Why does my Jeep Grand Cherokee Fan quit working?

In this one we take a stab at permanently fixing a common issue with the 1999-2004 Jeep Grand Cherokee. The electric cooling fan will quit working, and your jeep will overheat, due to a failure in the electronic fan control relay. This is a heat related failure and I add a large heat sink and relocate the relay to try and avoid further issues.

Where is the temperature sensor on a Jeep Grand Cherokee?

To test the solenoid unplug the temperature sensor located between the A/C compressor and the alternator just in front of the intake manifold. If the solenoid is working properly the fan will go into Hi-speed. If there is no change in RPM of fan the solenoid or the wiring from ECM to solenoid is at fault.

Is there a way to override a jeep cooling fan?

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Where is the fuse box on a 1999 Jeep Grand Cherokee?

Fuse box diagram Jeep Grand Cherokee 1999-2004 For the Jeep Grand Cherokee second generation 1999, 2000, 2001, 2002, 2003, 2004 model year. Fuse box located. The fuse panel is on the lower instrument panel just to the left of the steering column. A label is stamped on the fuse panel cover to identify each fuse for ease of replacement.

How big is the fuel pump relay on a Jeep Grand Cherokee?

Fuel Pump Relay, Automatic Shut Down Relay, Powertrain Control Module, Transmission Control Relay (4.7L)

Where is the power distribution center on a Jeep Grand Cherokee?

The Power Distribution Center is located near the battery (left or right depending on the version). How to check the fuses? How to replace a blown fuse? Why do car fuses blow?

How to troubleshoot a jeep PWM fan relay test?

Radiator Fan Motor Circuit Wiring Diagram (1999-2003 4.0L Jeep Grand Cherokee). TIP 1: The way I’ve designed the Jeep PWM fan relay test, you’ll need a scan tool that can read live data (not a code reader), since you’ll need to keep an eye on the engine’s coolant temperature with it.

What is the PWM code for a Jeep Grand Cherokee?

This tutorial will help you to diagnose the Pulse Width Modulated (PWM) fan relay on the 1999-2003 Jeep 4.0L Grand Cherokee SUVs and/or the codes P1491 ( Radiator Fan Control Relay Circuit ). The dealer, at the time of this writing, will charge you $95 (US) to diagnose it.

What are the symptoms of a bad fan relay?

Symptoms Of A Bad PWM Fan Relay. FAN RELAY TEST 1: Checking For Power. FAN RELAY TEST 2: Checking For Ground. FAN RELAY TEST 3: Checking For The Relay Control Signal. FAN RELAY TEST 4: Calculating the Amperage Draw of the Fan Motor.

Why is the air conditioning not working on my Jeep Grand Cherokee?

What are common reasons my Jeep Grand Cherokee has air conditioning problems? While there are a variety of reasons your Jeep Grand Cherokee air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

What causes an AC control switch to stop working?

As the AC control switch is an electrical switch, it contains electrical contracts and knobs that can wear and break. A broken knob or completely worn out electrical contact inside of the switch may cause one or more of the settings not to work, or to work intermittently.

Why are my coolant fans not running when AC is turned on?

Coolant fans not running when ac is turned on. AC compressor clutch engage then it will disengage. System has freon in it. It was working find but now nothin7. My car has 234565 miles. My car has an automatic transmission.

How to fix AC and heater in 1999 Jeep Grand Cherokee?

Clarify it by editing! The 1999-2004 Jeep Grand Cherokee has a common failure where the blower fan wire adapter overheats and melts. Use this guide to fix and repair this connector and get your AC and Heater working again! No parts specified. Place the car in park, activate the parking brake, and leave the car running.

Where is the blower motor on a Jeep Grand Cherokee?

The blower motor is located under the dash on the passenger side of the vehicle. For easier access to the wiring push the seat back, and place your tools on the floor of the car .

When does the radiator fan turn on in a jeep?

The radiator fan only turns on once the temperature reaches a certain temperature I believe its about half. But on highway speeds it should run very cool. Your electric fan WILL turn on with your A/C switched on, I was 100% certain it did BEFORE I went out to test it simply so I could say I tested it.

Where is the blower motor adapter on a Jeep Grand Cherokee?

The blower motor adapter is a bundle of three wires located on the left side. While the vehicle’s ignition is on, push and pull gently on the wire connection. If the blower motor turns on, you have identified the problem and following this guide will help you fix it

Where are the wires on a Jeep Grand Cherokee?

Push the seat back, and place your tools on the floor of the car. There are a few wires hanging below the passenger side dash. The blower motor adapter is a bundle of three wires located on the left side. While the car is on push and pull gently on the wire connection. If the fan turns on you have identified the problem and we will fix it.

How do you replace a cooling fan relay?

Pay specific attention to the physical dimensions of the relay, and more importantly, to the number and orientation of the pins on the replacement. Step 4: Install replacement cooling fan relay. Plug the electrical connector into the replacement cooling fan relay and reinstall it back into place.

What are the symptoms of a bad cooling fan relay?

Relays bridge the gap, making it possible for small currents to activate larger ones. One of the first symptoms commonly associated with a bad or failing cooling fan relay is; an engine that runs hot or overheats. Non-functional cooling fans are another common symptom of a potential problem with the cooling fan relay.

Why does my 2003 Jeep Grand Cherokee overheat?

i have a 2003 ,overheated. solution: change the fan motor. faulty fan motors due to faulty windings from factory. LISTEN TO THIS IMPORTANT MESSAGE!!!!!!!!!!!!!!!!!! For anyone having overheating problems with their Jeep Grand Cherokees take these necessary steps before taking your vehicle to a dealership………. 1.

Is there coolant coming out of my Jeep?

I bought a 2000 Jeep Cherokee Sport with 45k mile (yes, that’s right) three days ago. Had them change the timing belt at the dealer before I took it. Have driven it 200 miles. Pulled in the driveway just now and fluid (I think it is coolant) pouring out from under the front.

How does the cooling fan work on a Jeep Grand Cherokee?

The cooling fan in a Jeep Grand Cherokee keeps engine temperatures at the correct level by kicking on during times when the engine reaches higher-than-average temperatures. Without it, the engine can reach dangerous temperatures and damage engine components.

What should I do if my Jeep Grand Cherokee is overheating?

In the Cherokee XJ you should fill the radiator with coolant and let the engine work and reach normal working temperature for at least 5-10 minutes. then, install the radiator cap in place, turn off the engine and fill the coolant bottle to the max. In the Grand Cherokee WJ there is a screw that should be open, we will publish an article soon.

What causes the radiator on a jeep to overheat?

Check the radiator cap – a radiator cap that won’t hold pressure might cause overheating problems. If you replaced any of the cooling system components (besides the fan/fan clutch) you should bleed the air out of the system.

Why does my AC fan control module stop working?

Since this relay works the blower motor as well, you may notice that the air flow in the cabin of the vehicle is significantly reduced. The module helps to regulate how hard the blower motor works when needed, which is why it will cease to work with this part.

How can I tell if my radiator fan is working?

When a radiator fan works it usually makes a whirring sound that is easily noticeable. However, the radiator fan does not always start spinning on ignition. The ECU signals the radiator fan to work at the precise time. So, do not worry if the fan doesn’t immediately start working. Visually check the fan if you don’t hear its noise. 1. Broken Fuse

What to do if your Jeep Grand Cherokee cooling fan is not working?

If the fan does not operate, continue troubleshooting. Switch the wires to the opposite terminals. If the fan still does not operate, the cooling fan motor and assembly must be replaced. If the fan does operate, the vehicle must be taken into a professional service center for testing on the PCM, which controls the cooling fan relays.

Why is the radiator not working on my Jeep Liberty?

If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your Liberty is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.

When to replace an AC fan control module?

Usually, these fans will come on when the system gets a bit too hot and the go off once the desired temperature is reached. If you notice that the cooling fans run for a very long time without shutting off, then the A/C fan control module may need to be replaced.

Why are my cooling fans not coming on?

Cooling fans not running at all If the cooling fans are not coming on at all, then this may also be a sign that the fan control module is damaged. Without the cooling fans running properly, you will be at risk of having the car overheat. Running a car hot for a long period of time can lead to other damages like a blown head gasket. 3.

Why does my car blower motor not shut off?

If you have a vehicle with climate control system and a variable speed blower motor and the blower motor won’t shut off and stays on HIGH with the car turned off and the key out, chances are the blower motor motor control processor is toast or the HVAC control module is damaged.

What to do if your climate controlled blower wont shut off?

If your climate controlled blower processor is shot, be prepared to spend mucho bucks for a replacement. But before you start throwing expensive parts at the problem, you’ll have to do some checking. Start by testing the gray/black wire at the blower motor control processor. First, try grounding the wire. Then try removing it.

Why is the heater on my Jeep Cherokee not working?

May 2, 2019. One of the most common (and inconvenient) problems with the Jeep Cherokee is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working.

What does the thermostat on a Jeep Cherokee do?

Never touch the radiator cap unless the vehicle is ICE COLD. The job of your Cherokee’s thermostat is to regulate the temperature of the engine. It does this by allowing water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up.

What to do if your Jeep Cherokee overheats?

An oil change could be just the thing your Cherokee needs to chill out. Draining old oil, and refilling it with fresh oil, plus changing the oil filter will make it run better. But if the oil level is too low, you will definitely experience overheating. 6.

What to do if your Jeep Grand Cherokee radiator is not working?

The first thing that you would want to do is locate the fuse for your Grand Cherokee’s radiator fan and make sure that it hasn’t blown. If it is blown, replacing the fuse will only solve the problem for a very limited period of time. Unless the wiring issue is fixed, the fuse will blow again. The wiring harness itself can go bad.

Why is my radiator fan not turning on?

The fan will turn on after the temperature reaches about half. Usually comes on when the car is standing still due to the small amount of air circulating through the radiator. No the AC will turn the radiator fan on to pull air across the condensor.

Why is my Jeep radiator not turning on?

The fan will turn on after the temperature reaches about half. Usually comes on when the car is standing still due to the small amount of air circulating through the radiator. Too many mods to list… No the AC will turn the radiator fan on to pull air across the condensor.

Can a radiator fan be turned on with a / C on?

Your electric fan WILL turn on with your A/C switched on, I was 100% certain it did BEFORE I went out to test it simply so I could say I tested it. So for clarification, I just tested it on my own rig, and the electric fan turns on with the A/C on.

What should the fan temp be in a Jeep Wrangler?

Actually, 226 is pretty average for the engine in traffic. Mine runs up to 228 or so in Houston, then backs off pretty rapidly once the fans kick in. The highest I’ve ever seen is 231 and that was getting stuck in an accident on Pikes Peak.

Why does my Jeep overheat while sitting idle?

I have a 2004 Jeep Cherokee that keeps overheating. It overheats when I am sitting idle for about 5 minutes with the air running. When I drive, the gauge goes back down quickly. I have replaced thermostat, fan, flushed the radiator system.

Why is my screen not working on my 2019 Jeep Cherokee?

Today it happened to me no screen and no radio on jeep cherokee 2019 23 people found this helpful. My Jeep did the same. Turn ignition on and hold both the volume and tube button at the same time. Should fix the issue. 83 people found this helpful. Just picked up a 2019 Jeep Cherokee Limited High Altitude. Touch screen unusable.

Why is there no heat in my Jeep Grand Cherokee?

This feature is not available right now. Please try again later. If you are having heat problems in your Jeep Grand Cherokee this is one of the first places you should look. This is a common problem with the Jeep Grand Cherokee. As a tip the drivers side actuator has a gear around it, these commonly break that you will need from the dealer.

Why does the a / C quit blowing on my 1999 Jeep Grand Cherokee?

The A/C (and heater) quit blowing on my Dad’s 1999 Jeep Grand Cherokee a while back so I took a look at it. The fresh air/recirculate blend air door seems to have broken up in the air duct causing it to suck up against the blower intake and stop all the air flow.

How to fix no air flow Jeep Grand Cherokee?

The proper fix would be to disassemble to dash and then the blower and duct assembly out from under the dash in order to replace the broken parts however this simple fix will get the air working again quickly and cheaply. The only thing is you will loose the control to allow in 100% fresh air. Loading…

Why is my Jeep Grand Cherokee heater not working?

While there are a variety of reasons your Jeep Grand Cherokee heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

What does the thermostat on a Jeep Grand Cherokee do?

Never touch the radiator cap unless the vehicle is ICE COLD. The job of your Grand Cherokee’s thermostat is to regulate the temperature of the engine. It does this by allowing water to enter the engine when it is getting hot, and by keeping coolant from entering while the vehicle warms up.

Why does my Chevy Camaro heater not work?

They both should feel warm or hot to the touch with the engine on. If one of the hoses is hot, and the other one is cold, that is a pretty good indication that the heater core is clogged. If the neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure.

Where is the relay on a Jeep Grand Cherokee?

A Jeep has more than one relay that are the same (go by the relay number on the top or side of the relay) in the fuse box on the driver’s side fenderwell. Remove a known good relay and swap it with the radiator fan relay. Operate the vehicle and check the operation of the unit replaced.

Why does my Jeep Grand Cherokee radiator not turn on?

When the negative wire is attached to the relay, the relay should have an audible click as it activates. If the relay fails to click, move the jumper wires to the second set of terminals in the event the wrong terminals were being used. If the relay fails to click it is bad. Check the radiator fan switch if the relay proves to be good.

What to do if your radiator fan is not working?

No the AC will turn the radiator fan on to pull air across the condensor. Your going to need to check for power at the fan, the fan can still be failed and spin just fine by hand, considering you dont have high or low I would lean towards a fan or fan connector concern.

Where does the radiator fan go when its hot?

Having said that Matt, as I already suggested, when its hot out I run right at the middle hash mark, when its cool I run just mm or 2 below, with a known fully functional fan. It has done this for the 1.5 years I have had it, first noticed while I was towing and it freaked me out for a second but it has NEVER gone above the 1/2 hash mark.

How to install an electric fan in a Jeep Cherokee?

Remove fan retaining screws from radiator upper crossmember (Fig. 41). Disconnect the electric fan connector. Lift fan straight up out of vehicle. Align lower retaining tabs of fan shroud with slots in bracket at bottom of radiator and push fan down into position. Tighten the mounting screws to 4.07 N•m (36 in- lbs).

How to check battery voltage in Jeep Cherokee?

Check for battery voltage at terminal 2 of the fan relay connector (Fig. 43). If battery voltage is not present replace the fan diode assembly. With engine running, A/C on, and fan relay removed, check for battery voltage at terminal 2 of fan relay connector (Fig. 43).

Why is my air conditioning not working on my Jeep Grand Cherokee?

There are many reasons why air conditioning may not be working properly on your Jeep Grand Cherokee. When looking for the reason, you should always start with the most obvious cause, low refrigerant level in the system. In any case, it is advisable for laypersons to visit a workshop.

Why does my Jeep Grand Cherokee make a clicking sound?

The most common symptom of faulty blend door actuator on Jeep Grand Cherokee is a slight clicking sound repeatedly coming from under the dashboard. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. Sometimes changing the temperature can temporarily stop the sound.

How can I tell if my Chevy Aveo radiator fan is bad?

You can test the voltage going from the fan relay to the fan itself. If it is getting 12+ volts, the fan should be coming on. But if it’s not, which means the fan has gone bad. This video from Ratchets and Wrenches is a phenomenal resource on how to properly diagnose a wiring problem.

What to do if your air conditioner is not working?

Replacement of most air conditioning components requires complete evacuation of the air conditioning system with a refrigerant recovery machine. Once components are re-installed, the technician will remove all air from the system in preparation for recharging the system with new refrigerant.

Where can I buy a jeep radiator fan assembly?

Shop AutoZone for Jeep Grand Cherokee Radiator Fan Assembly. 10% OFF $75. Use Code: DIYSAVE10 Online Ship-to-Home Orders Only

Where are the fuse diagrams on a 2002 Jeep Grand Cherokee?

2002 Jeep Grand Cherokee Fuse Diagrams for Junction Box in cabin and Power Distribution Center under hood 10. Radiator fan relay 40A Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period. They include wiring diagrams and technical service bulletins. In most cases, their diagrams are right from the factory manuals.

Where is the fan on a Jeep Grand Cherokee?

Unplug the electrical connector running to the fan motor, which is in the middle on the rear of the fan shroud. Attach a fused jumper wire to the terminal on the cooling fan that is more exposed after unplugging the electrical connector.

What happens when the air conditioner compressor fails?

When the compressor fails, the most common symptom is warm air from the vents. A squealing or grinding noise may also be heard from the compressor in the event of mechanical fai… Read More When the condenser fails, the air conditioner will fail along with it.

1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.

How does the cooling fan relay work on a car?

The cooling fan relay is the relay that controls the engine’s cooling fans. When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature…

Where are the fuses in a Jeep Cherokee?

Here you will find fuse box diagrams of Jeep Cherokee 1997, 1998, 1999, 2000 and 2001, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay. Cigar lighter (power outlet) fuses in the Jeep Cherokee are the fuses #1 and #2 in the Instrument panel fuse box.

Why does my Jeep Cherokee air conditioner not work?

However, over years of use, many Jeep Cherokee air conditioning systems begin to work less effectively, making summer drives very hot and uncomfortable. Before repairing this problem, assess what is causing it by troubleshooting the system to see why the ice-cold air that was once blowing out of the air vents is now warm.

When to test a radiator cooling fan relay?

If no power is observed at either 87 or 30, the fusible link or maxi fuse has shorted. Example: Testing the radiator cooling fan relay, the cooling fan should be operating. Step 14 – When replacing a relay be sure to match up the terminal location from the old relay to to the new unit.

What should I do if my relay has failed?

Turn the ignition to the “ON” position and jump terminals 87 and 30 the relay is now jumped and the accessory should activate, if so the relay has failed. If no power is observed at either 87 or 30, the fusible link or maxi fuse has shorted.

Why is the trigger circuit on my relay not working?

If so the trigger circuit of the relay electrical system is working, if not continue to next step. ( Note: If the relay clicks and the circuit is still not working there is a good chance the contacts inside the relay have shorted.)

How old is my 1995 Jeep Grand Cherokee Laredo?

I have a ‘95 Jeep Grand Cherokee Laredo which I bought in ‘98 when it was three years old. I like my Jeep; It still looks good and has less than 100,000 miles on it. The problem is the VIC, which thinks the driver’s door is ajar all the time.

Why are the lights on my Jeep not turning off?

Short simple answer to why Interior lights won’t turn off on my Jeep or Chrysler. No need to pull bulbs, Fuses, or disconnect the battery. Sam at ACD Auto Centre has the answer. Category Autos & Vehicles Show moreShow less Loading… AutoplayWhen autoplay is enabled, a suggested video will automatically play next. Up next

What’s the problem with my 1995 Jeep Vic?

The problem is the VIC, which thinks the driver’s door is ajar all the time. The VIC beeps and flashes a warning message. I couldn’t find a procedure for removing the VIC on this model Jeep, so I decided to document my experience in the hope it might be useful to another ‘95 Jeep owner.

Where is the cooling fan relay located on a car?

The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator. To replace the cooling fan relay, there are two methods that we will cover for the positions mentioned above.

What happens when a cooling fan relay fails?

If the relay fails, it will be unable to supply power to the fans, and as a result they will not operate. This can lead to overheating, especially when the vehicle is at a stop, where there is no forward motion by the vehicle to pass air over the radiator. 3. Cooling fans stay on at all times

Why are the cooling fans not working on my car?

1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

How does the cooling fan work on a Jeep Cherokee?

Jeep Cherokee Electric Cooling Fan Diagnosis & Repair. When the air-conditioning is used the engine ECU grounds the A/C relay coil allowing current to flow through it. This activates the A/C relay which then supplies current to the A/C clutch, fan diode assembly and cooling fan relay.

How does an air conditioner relay work on a car?

When the air-conditioning is used the engine ECU grounds the A/C relay coil allowing current to flow through it. This activates the A/C relay which then supplies current to the A/C clutch, fan diode assembly and cooling fan relay. The cooling fan relay is activated and the fan operates.

What to do if cooling fan does not work?

If fan motor does NOT operate, check continuity between terminal 4 of the relay connector (Fig. 43) and body ground connections on the fender panel back from the relay connector (Fig. 42). If continuity exists replace the fan motor.

How does the cooling system work on a Jeep Cherokee?

When coolant temperature is below 190*F (88*C) the switch is open preventing the relay from being grounded and the cooling fan from being energized. When the air-conditioning is used the engine ECU grounds the A/C relay coil allowing current to flow through it.

How to troubleshoot the air conditioning on a 2001 Jeep?

Turn on your Jeep’s engine and turn on the air conditioning. Let it idle and check to make sure that the electric fan in front of the air conditioning compressor is on. If it is not, then this could cause your air conditioning system to perform badly at idle.

Can a Jeep Cherokee Drive without air conditioning?

Depending on what kind of climate you live in, driving a car without air conditioning can be almost impossible. However, over years of use, many Jeep Cherokee air conditioning systems begin to work less effectively, making summer drives very hot and uncomfortable.

How do I stop no air from dashboard vents?

This door is controlled by a thumb wheel that when activated will open and close the vent air flow door. Work the thumb wheel from one side to the other while checking the airflow. The flow should stop and start again, if the thumb wheel does not make a difference the problem is somewhere else.

When do you turn on the fan relay?

When the correct parameters are met, a temperature switch or the computer will activate the relay, which will allow power to the fans. The relay will usually be activated once it is detected that the vehicle’s temperature approaches excessively high temperatures.

Why is the air blower on my Jeep not working?

I will start the Jeep and the air blows fine, then without rhyme or reason it completely stops (there is no specific duration between work/failure). Depending on the length of the trip, it may come back on again. I replaced the blower motor resistor and I thought that fixed the problem, but unfortunately it did not.

Is the a / C heater on my 2004 GC failing?

My 2004 GC’s a/c – heater blower is failing intermittently. I will start the Jeep and the air blows fine, then without rhyme or reason it completely stops (there is no specific duration between work/failure).

Where is the blower connector on a jeep?

The blower motor sits right next to the resistor or controller (resistor is for manual AC, controller is for automatic AC system), so the connector can be found on the blower motor itself. Since the state of the blower changes after switching ignition off/on, the problem can be inside the AC control panel.

What are the symptoms of a bad PWM fan relay?

Symptoms Of A BAD PWM Fan Relay. The most obvious symptom of a BAD PWM fan relay is that your Jeep is gonna’ overheat. You’ll also see one or all of the following symptoms as the engine overheats:

Why does my floor fan not turn on?

If you turn on your fan and the fan motor hums even though the fan blades won’t move, the cause may be that the gears are stuck. Once you’ve cleaned the fan as outlined in the previous step, try unscrewing the motor housing so you can see the electric motor parts.

Why is my Jeep Wrangler fan not working?

Recently the fan on my 2001 TJ stopped. It does not work on any speed or on heat or A/C. I pulled the blower motor and straight wired it to the battery. It worked. I also pulled the speed selector switch. I ohm the switch. It appeared to be ok.

How to diagnose a Jeep JK radiator fan issue?

The Relay in the TIPM (K11) labeled “Radiator Fan Low” The dual relays over by the brake master cylinder labeled “Fan Relays” on the internet (Mopar Part 56055666AB) The lack of a P069X style code being thrown led me to believe this was a unique problem with only the “high” speed part of running the fan.

What to do if your Jeep Grand Cherokee won’t start?

take your key and turn the drivers side door lock to the right , then left and then right again …this will reset the security system. 23 people found this helpful. 2002 Grand Cherokee. Here’s what happened to me: At every start, the engine would run for ~3 seconds, then die.

What’s the problem with my Jeep Grand Cherokee?

Please help very long experience in my Grand Jeep Cherokee model 2005 Problem, after long or short run i will shut off , then few minutes i will started but after about 5 seconds it shut off and we need to standby almost 8 hours to start again, please help me to solve this problem , Im here now in Saudi Arabia but I m no is the Pilipino. Thanks

How to reset the security system on a Jeep Grand Cherokee?

take your key and turn the drivers side door lock to the right , then left and then right again …this will reset the security system. 26 people found this helpful. 2002 Grand Cherokee. Here’s what happened to me: At every start, the engine would run for ~3 seconds, then die. Here’s the solution: Use only a Jeep key made by Jeep.

How can I Fix my Jeep Cherokee heater?

Every Cherokee in this range either has, or will have, this common failure. The pictures show the hardware provided for the fix. All work is done from the foot area of the passenger side of the Jeep, with a Dremel cut in the bottom of the heater box…no removal of the dash panel or evacuating the AC system and draining the radiator.

Why is my Jeep Cherokee heater not working?

What are common reasons my Jeep Cherokee has heater problems? While there are a variety of reasons your Jeep Cherokee heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

How to regulate between heat and AC in Jeep Cherokee?

You can grasp the axle with your fingers and feel the extents of movement of the door by turning the knob. You should be able to manually regulate between heat and AC by turning the axle. The door should hit a hard stop point when you turn it to heat or AC and not have any play beyond that point.

Is there a hydraulic radiator fan for a Grand Cherokee?

Hi all I have a 2001 Grand Cherokee Limited with the 4.7L engine 2wd if that matters. This one has the Hydraulic fan which blows me away. I spent a good deal of time trying to figure out where the relay was ands there is not one. Anyway my unit is running hot after idle for say 5-10 minutes. As soon as I start moving it cools down.

When did the Jeep Grand Cherokee radiator fail?

The failure occurred fifteen months after the radiator was replaced by the mechanic. The failure mileage was 20,000. See all problems of the 2002 Jeep Grand Cherokee . Tl- the contact owns a 2015 Jeep Grand Cherokee echo diesel.

Is the blower motor on a 2011 Jeep Laredo?

Blower motor intermittently stops on a 2011 Jeep Grand Cherokee Laredo. New blower motor and resister. Also chkd all 3 gear motors under dash – all good.

What is the problem with my Jeep Grand Cherokee?

2011 JEEP GRAND CHEROKEE. IT APPEARS I HAVE BLEND DOOR ACTUATOR PROBLEM. I AM ALSO HAVING A PROBLEM WITH FAN. FAN USE TO START ABOUT 10 SECONDS AFTER I STARED THE CAR. NOW IT IS ABOUT ONE MINUTE.

What should I do if my Jeep Cherokee cooling fan does not work?

Check for battery voltage at terminal 2 of fan relay connector (Fig. 43). Connect a jumper wire across the radiator temperature switch harness connector. If fan operates proceed to next step. If fan does not operate replace radiator temperature switch once the engine has cooled down.

Blower motor intermittently stops on a 2011 Jeep Grand Cherokee Laredo. New blower motor and resister. Also chkd all 3 gear motors under dash – all good.

What’s the problem with my Jeep Grand Cherokee air conditioner?

Air Conditioner. Cold Air On Left Side, Hot/ Very Warm On Left. I Am Having A Problem With Fan. Fan Use To Start About 10 Seconds After I Stared The Car. Now It Is About One Minute. Then The Fan Shuts … read more Second opinion] Blower motor wont shut off….. ignition off, key removed, and controller head removed and unplugged.

Why does the radiator fan stay on all the time?

If your radiator fan stays on all the time when the car is started or with the ignition being on we will explain what is causing that. Radiator fan should not stay on all the time. The radiator fan is supposed to be activated at certain coolant temperature or the radiator might be on if you have the AC turned on.

Why is my Jeep running hot while sitting still?

If your Jeep is running hot while sitting still your fan must be near non-functional. I will see if I can locate the operation explanation for the fan… Sounds like maybe a plugged rad or thermostat. These jeeps tend to run a bit hotter to begin with so I put a 180 degree t-stat in mine when I was chasing my cooling issues recently.

Is the hydraulic radiator fan 4.7L still working?

I have a 2002 GCL 4.7L with the hydraulic fan and it has continued to work great. I had at one point considered swapping it out for an electric fan, since I am more familiar with those, but the hydraulic unit has continued to perform admirably. The fan always seems to be turning at some speed, even when cool.

How do you replace a cooling fan on a Jeep Grand Cherokee?

Pull the cover from the fuse box on the end of the panel. Using the fuse diagram on the inside of the cover, locate the fuse for the cooling fan and remove it with needle-nose pliers. If the metal link inside the fuse is broken, replace the fuse.

How does a hydraulic radiator fan on a jeep work?

Instead of using an electric fan or a mechanical fan with a viscous clutch, Jeep uses a hydraulic radiator fan. The hydraulic radiator fan receives power steering fluid pressure from the power steering pump. How does the Jeep diesel regulate engine cooling? Jeep uses a hydraulic radiator fan on the 5.7L and 3.0L diesel engine.

What kind of fan does a jeep diesel engine use?

The Jeep diesel radiator fan is completely different than anything you’ve seen on other engines. Instead of using an electric fan or a mechanical fan with a viscous clutch, Jeep uses a hydraulic radiator fan. The hydraulic radiator fan receives power steering fluid pressure from the power steering pump.

What kind of blower motor does a 2004 Grand Cherokee have?

2004 grand Cherokee limited v8 4.7 here. blower motor (sensor) replaced last month (Not OEM part) due to A whisper of hot and cold air only. The cold and hot air is coming out now but not nearly enough like before to cool entire interior. Have to keep fan on high just to feel slightly comfortable in driver seat.

What causes the blower motor to go out on a jeep?

The resistor is the most common part that goes out. You can check the blower motor by running a separate power line to it, it should run full blast when you do this. 28 people found this helpful.

Why is there no air in my Jeep Grand Cherokee?

Found broken vacuum hose under battery platform going into reservoir, replaced that (my cruise control started working). Cleared check valve in vacuum line near firewall, got a bit of air blowing but still not enough. Finally after reading your idea here, pulled the blower motor to check direction of flow.

Are there any problems with the Jeep radiator?

Jeep Grand Cherokee owners have reported 66 problems related to radiator (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Jeep Grand Cherokee based on all problems reported for the Grand Cherokee.

The cooling fan relay has an electrical connector that will need to be disconnected and switched over to the replacement cooling fan relay. Most commonly used connectors are a push type connector. Disconnect connector and remove cooling fan relay. Step 3: Compare the replacement cooling fan relay to the one being removed.

What happens when the fan relay does not work?

By using a lower voltage signal to control the relay, there is less stress on the rest of the wiring and charging system. When the fan relay does not work, then the proper signal will not be received and the fan cannot cool the system down.

What does Dorman radiator fan relay Kit do?

Restore the radiator fan to proper operation with Dorman’s Radiator Fan Relay Kit. The Relay is quality-engineered to provide power to the Radiator Fan, controlling the fan’s speed and ensuring efficient cooling. It comes with everything necessary for a complete repair.

How to shut down a jeep ASD relay?

1 Lost 12 volt DC electric power. 2 Sees the spark weak or dead on the ignitor drive to Ignition coil primary pin. 3 Crank sensor bad. 4 Cam sensor bad, or misfiring, CMP. 5 ASD input read back pin fails. 6 Same ASD output read back. 7 Immobilizer active.

What are the symptoms of a bad ASD relay?

One of the most common symptoms of a bad (ASD) relay is an engine that will start. But, Stalls almost immediately, or at random times. The (ASD) relay supplies power to the vehicle’s ignition coils and fuel injectors.

Why is my automatic shutdown relay making a clicking noise?

Automatic Shutdown (ASD) Relay Making A Clicking Noise (Common On Jeep) Most likely the clicking noise is because there wasn’t enough voltage going to the relays to engage them. As a result, The (ECU) was detecting a low battery condition even though it had a good battery.

Where are the fuses on a Jeep Cherokee?

Jeep Cherokee (XJ) 1997 – 2001 Fuse & Relay Information FUSE NUMBER FUSE CURRENT RATING CIRCUIT INFORMATION (What the fuse is fo 1 25 Amp Power outlet – Located top left column i 2 25 Amp Cigar lighter 3 10 Amp Left headlamp

Why is my a / C blower not working in my Grand Cherokee?

However, over the next few weeks the A/C blower problem returned intermittently. It seems to be a problem when the temp is around 80 degrees or higher and the car has been sitting in the sun. The problem again happened on 6 October (a warm day) and it was exactly the same problem originally described.

When did I replace the blower motor on my Jeep?

I brought the Jeep back in on 3 August 2016 to have the parts replaced. Two parts were replaced at that time: 1. Module/resistor/power, blower motor (P/N 68079480AA Module – Power)

Why does the a / C blower motor cycle on and off?

The A/C blower motor cycling on and off is definitely the A/C system informing you of a problem. It’s identifying a fault. That fault is usually a broken blend door actuator gear on the driver or passenger side. If the blend door motor actuates past its normal travel… the A/C unit acts in this manner.

Is the HVAC blower on my Jeep Laredo working?

Blower motor intermittently stops on a 2011 Jeep Grand Cherokee Laredo. New blower motor and resister. Also chkd all 3 gear motors under dash – all good. Won’t switch from defrost to floor either … read more Air Conditioner. Cold Air On Left Side, Hot/ Very Warm On Air Conditioner. Cold Air On Left Side, Hot/ Very Warm On Left.

I brought the Jeep back in on 3 August 2016 to have the parts replaced. Two parts were replaced at that time: 1. Module/resistor/power, blower motor (P/N 68079480AA Module – Power)

How can I tell if my Jeep Grand Cherokee is overheating?

Coolant temp sensors don’t measure air temp. If there was no coolant in your engine the gauge will read cool when acualy the engine will be turning itself in to a molten pile of steel. Sounds to me like your head gasket blew out, or wore you cracked a head. There is a easy way to tell.

What makes the radiator fan turn on or off?

A radiator temperature-sensing switch activates the fan relay at 198 degrees F turns the fan on and controls its operation. Make sure the key is off. Switching relays is the fastest way to check for a bad relay when possible.

What should I do if my radiator fan is not working?

A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan. The fan itself often uses a big fuse of around 50A, while there might also be a separate small fuse to the fan control module.

Why does my Jeep Grand Cherokee not have an air conditioner?

Blower Motor – If there is no air blowing from your Grand Cherokee at all, the blower motor is at fault. They are not that expensive and are easy to replace (most of the time). Blend Door – The blend door controls how much air conditioned and heated air enters the cabin.

What to do if your Jeep Cherokee does not have power?

If the blower motor does not have power, check the fuses, and if they are good, check to make sure there is power to the blower motor resister. If there is power to the resister, the resister is bad; if not, the control switch is bad.

Why is my Jeep Grand Cherokee fan not working?

If the fan comes on you know the fault is before, if the fan doesnt come on you know its after, in that circuit or the fan itself. 2005 Jeep Grand Cherokee – Under the knife getting a complete overhaul. So It ended up being the fan motor.

Why does the AC not come on in my Jeep Cherokee?

If they are lower and the compressor did not come on, then it is undercharged and needs Freon to make the low side switch come on and activate the compressor. Start the car and turn the AC on. Open the low side only valve and allow the charge to build to 30 lbs. on the low side and 150 lbs. on the high side.

Why does my Jeep Grand Cherokee not start?

The engine would turn over as usual but wouldn’t start until several tries. It first happened to my wife and, after making sure she was applying the brake and that the transmission was in park, it finally started after several attempts. For two weeks after that it started as normal but then it happened to me.

Is there a recall on my Jeep Grand Cherokee?

The brake booster recall was simply to reinstall a new water seal around the booster which, while a bit involved, was straight-forward. Apparently the original instructions for that recall were incorrect and they had to install a new seal positioned further back on the booster so it sealed against the firewall.

Is there a problem with my Jeep Grand Cherokee?

Very often, this will solve the problem. But Jeep Grand Cherokees seem especially prone to more serious transmission problems, and some owners are quite vexed at their inability to determine the causes.

Where are the fuses located in a Jeep Grand Cherokee?

The Totally Integrated Power Module is located in the engine compartment. This center contains cartridge fuses and mini fuses. A description of each fuse and component may be stamped on the inside cover, otherwise, the cavity number of each fuse is stamped on the inside cover that corresponds to the following chart.

Why does my Jeep Grand Cherokee not shift gears?

For example, you may find that you’re only able to drive the car in the automatic transmission’s third gear, only being able to select the other two gears when you shift the transmission manually. The most common cause of transmission problems is the easiest to fix: check the fluid level in the transmission and restore it to the proper levels.

What do the flashes on a Jeep Cherokee mean?

There will be two sets of flashes, separated by a pause. The number of flashes in each group indicates the first and second digit in the flash codes. A code 55 identifies the end of flash code transmission. Below, you’ll find the list of Transmission Fault Codes for Jeep automatic transmissions.

Where is the relay on a radiator fan?

The fan relay is often located in the engine bay’s fuse box, but the best way is to check your repair manual to find where it is located. Testing a 4 pin relay is often very straightforward. Remove the relay and give 12 volts to pin 30 and 85. Ground pin 86 and check if there is voltage coming out from pin 87.

What should I do about my Chrysler cooling fan?

Chrysler cooling fans are a common fault. However they can be a little puzzling to test. Review the electrical diagram before you begin and this should help Chrysler cooling fans are a common fault. However they can be a little puzzling to test. Review the electrical diagram before you begin and this should help Skip navigation Sign in

What does it mean when your radiator fan is not working?

This is what we call a blown fuse. A blown fuse is no big deal, and changing one does not cost a lot of money. If your car’s radiator fan is non-functional, check your car’s user manual and locate the fuse for the radiator fan controller or the fan.

What to do if your heater fan relay is not working?

Put everything back together the way it came and re-program the code into the radio if needed. If you’ve checked the fuse panel, and the fan motor doesn’t run at all, or if it runs only on the lower speeds, the blower motor relay may be at fault. Relays are used to carry electrical loads that are too large for conventional switches.

What’s the difference between blower relay and AC relay?

If it says blower relay, you’re golden; if it says AC relay, you might have what you want. If it says cooling fan relay, it’s talking about the relay that controls the radiator fans. Some cars have something called a power relay or an “unloader” relay. These relays power the blower fan as well as some other accessories.

Where is the blower Motot relay on a 1998 Jeep Gran Cherokee?

Where is the blower motot… Where is the blower motot relay on a 1998 Jeep Gran Cherokee Submitted:12 years ago. Category: Jeep Show More Show Less Ask Your Own Jeep Question Share this conversation Answered in 6 minutes by: 11/26/2008 Jeep Mechanic: Jerry, Master Mechanic replied 12 years ago Jerry, Master Mechanic Category: Jeep

What kind of fuses does a Grand Cherokee have?

This power center houses plug-in “Cartridge” fuses which replace in-line fusible links. The power center also contains “Mini” fuses and plug-in full and mini ISO relays.

How many fuses are in a Jeep Grand Cherokee?

Engine Compartment Fuse Box № A Protected Component 16 15 Gasoline (2001): Oxygen Sensors, Oxygen 16 10 Gasoline (1999-2000): Oxygen Sensors 16 10 Diesel: Air Conditioner Compressor Clutc 17 20 Gasoline (1999-2000): Oxygen Sensor Down

Fuel Pump Relay, Automatic Shut Down Relay, Powertrain Control Module, Transmission Control Relay (4.7L)

The Power Distribution Center is located near the battery (left or right depending on the version). How to check the fuses? How to replace a blown fuse? Why do car fuses blow?

What to do if your Jeep radiator is overheating?

Most of the overheating issues are being solved while cleaning the radiator or replacing it with a new one. As written before, check the coolant pump. Check the radiator cap – a radiator cap that won’t hold pressure might cause overheating problems.

What causes a Jeep Cherokee engine to overheat?

There are several belts that may cause overheating just by being loose or worn out. Similarly, hoses can deteriorate or become loose. Belts like the serpentine belt may wear out. When it wears out, your water pump will not be able to do its job if water cannot be pumped in to cool the engine and radiator.

What happens when the thermostat is stuck open on a Jeep Cherokee?

When the thermostat is stuck open, the vehicle will be getting too much coolant. On the other hand, if it is stuck in the closed position, the radiator will not be getting any coolant at all.

What causes an empty coolant reservoir in a jeep?

The cause of an empty coolant reservoir can mean leaks. The most obvious leak would be in the reservoir itself. They are made of plastic that can corrode or crack over time. 3. Radiator An overheating vehicle often has a root cause of issues with the radiator.

What to do if your Jeep Grand Cherokee overheats?

I have a 2002 jeep grand Cherokee Laredo 4.0. overheating, replaced thermostat and gasket, temp gauge sensor. jumped out fan, fan would run but fab will not operate with A/C defrost. replace control module for fan, operated 3 times then quit. we have no blown fuses. please help.

Why is my Jeep Grand Cherokee not cooling?

With that being said, one very common problem is the radiator’s cooling fan not working. Jeep Grand Cherokees that have a factory tow package will have a mechanical fan attached to the water-pump in addition to the electric fan located closer to the radiator underneath the plastic shroud.

Why is my radiator on my Jeep not working?

Caution DO NOT open the radiator cap on any hot cooling system. With that being said, one very common problem is the radiator’s cooling fan not working.

What are the new models of the Jeep Grand Cherokee?

Overall, 2006 Grand Cherokee retains the rugged spirit of the Jeep brand, combined with engineering and quality control closer to the Daimler-Benz tradition. The 2006 Jeep Grand Cherokee lineup features two new models, the luxurious Overland and the high-performance SRT8.

What kind of chassis does the Jeep Grand Cherokee use?

Jeep Commander (2021- Grand Cherokee L) The Jeep Grand Cherokee is a range of mid-size SUVs produced by the American manufacturer Jeep. While some other SUVs were manufactured with body-on-frame construction, the Jeep Grand Cherokee has always used a unibody chassis.

Where does the Jeep Grand Cherokee come from?

European Grand Cherokees are manufactured in Austria by Magna Steyr. The Grand Cherokee “played a significant part in reviving Chrysler’s fortunes by moving it into the then nascent market for high-margin sports utility vehicles.”

Where is the fan relay on a jeep?

But if you have more time than money, you can easily diagnose it yourself, and I’ll show you how. Testing the fan relay is easy, the hardest part is getting to it, since Jeep in all its wisdom, located the fan relay behind the right side (passenger side) of the front bumper and you’ll probably have to remove it to access it.

Why is the radiator fan not working on my Jeep Grand Cherokee?

Remove a known good relay and swap it with the radiator fan relay. Operate the vehicle and check the operation of the unit replaced. If the unit works with the fan relay it proves that the relay is not the problem. Test the relay using jumper wires and a voltmeter.

What causes a bad or failing blower motor relay?

Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current…

How to repair a Jeep Grand Cherokee heater resistor?

How to repair Jeep Grand Cherokee Heater Blower Resistor. I own a 2005 Jeep Grand Cherokee. I haven’t had any major problems with my Jeep until the heat started fading. First the low speeds went out and then medium…until I was left with high. This might not seem too annoying, but trust me.

Where is the fuse panel on a Jeep Grand Cherokee?

The fuse panel is on the lower instrument panel just to the left of the steering column.

Where is the blower resistor on a Jeep Laredo?

This 2006 Jeep Grand Cherokee Laredo came in with the complaint that the blower will only work on high speed. The blower resistor is located behind the glove box area. I started by removing the two 7 mm screws that attached the lower hush panel to the bottom of the dash.

Where is the blower control switch on the dashboard?

The blower control switch on the dashboard controls the circuit flow of the blower motor to adjust the voltage from low, to medium, to medium-high, to high. When on high, the circuit bypasses the blower resistor.

What to do if your Jeep Grand Cherokee has no heat?

If you are having heat problems in your Jeep Grand Cherokee this is one of the first places you should look. This is a common problem with the Jeep Grand Cherokee. As a tip the drivers side actuator has a gear around it, these commonly break that you will need from the dealer.

What to do if your Jeep Grand Cherokee AC unit overheats?

The 1999-2004 Jeep Grand Cherokee has a common failure where the blower fan wire adapter overheats and melts. Use this guide to fix and repair this connector and get your AC and Heater working again! No parts specified. Place the car in park, activate the parking brake, and leave the car running.

What are the switches on a Jeep Cherokee?

Instrument Cluster, Radio, Rear Wiper/Washer Switch, A/C Heater Control or Heater Control, Rear Window Defogger Switch, Extended Idle Switch, Front Fog Lamp Switch, Rear Fog Lamp Switch, Transmission Range Indicator Illumination (PRNDL), Transfer Case Switch Illumination

How many amps does a Jeep Cherokee have?

Jeep Cherokee (XJ) 1997 – 2001 Fuse & Relay Information 21 15 Amp Horn (s) 22 20 Amp Rear wiper switch & motor 23 10 Amp Right side marker, turn, parking and tai 24 – – – Spare Fuse

What kind of fan does a Jeep Grand Cherokee have?

APPLIES TO: This tutorial applies to the following vehicles: 1999, 2000, 2001, 2002, 2003 4.0L Jeep Grand Cherokee. Radiator Fan Motor Circuit Wiring Diagram (1999-2003 4.0L Jeep Grand Cherokee).

How much does it cost to repair a jeep fan relay?

Most auto repair shops charge between $75 and $150 per hour. When is the code detected? With the key on or engine running, system voltage over 10v, fan relay commanded on, the Powertrain Control Module ( PCM) detects a shorted or open condition in the relay control circuit.

What should the resistance of the fan relay be?

With the key on or engine running, system voltage over 10v, fan relay commanded on, the Powertrain Control Module ( PCM) detects a shorted or open condition in the relay control circuit. Test the fan relay resistance (it should be 30-70 ohms).

What’s the problem with my 2011 Jeep Laredo?

My wife just recently began experiencing an issue with her 2011 Jeep Grand Cherokee Laredo. She will have the blower motor running and it will just quit, then cycle back on again maybe a moment or two later. Sometimes the motor will quit running for up to a minute.

The blower motor is located under the dash on the passenger side of the vehicle. For easier access to the wiring push the seat back, and place your tools on the floor of the car .

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