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).
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 my Jeep PWM fan not working?
The electric radiator fan motor does not come on. Coolant bubbling out of the coolant reservoir. Temperature gauge on the instrument cluster is maxing out. If your Jeep overheats beyond a certain point, you risk blowing the head gasket and/or cracking the cylinder head.
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.
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).
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.
The electric radiator fan motor does not come on. Coolant bubbling out of the coolant reservoir. Temperature gauge on the instrument cluster is maxing out. If your Jeep overheats beyond a certain point, you risk blowing the head gasket and/or cracking the cylinder head.
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.
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 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.
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.
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.
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.
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.
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 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:
What does a fuse do on a Jeep Grand Cherokee?
Fuse box diagram (fuse layout), location, and assignment of fuses and relays Jeep Grand Cherokee (WJ) (1999, 2000, 2001, 2002, 2003, 2004, 2005). A fuse is an element for protecting the electrical system. A fuse will trip (i.e. it will blow) in the event of a failure or improper interventions in the electrical system.
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
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:
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 cooling fan relay in my 2004 Jeep Grand Cherokee?
Where is the cooling fan relay in my 2004 Jeep Grand Cherokee? The hole under the passenger headlight has nothing and the relays are not in the fuse box either. Clicking this will make more experts see the question and we will remind you when it gets answered.
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.
Where is the cooling fan relay in my 2004 Jeep Grand Cherokee? The hole under the passenger headlight has nothing and the relays are not in the fuse box either. Clicking this will make more experts see the question and we will remind you when it gets answered.
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 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
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 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.