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.
Where are the cooling fan relays on a radiator?
The electric cooling fan (s) are controlled by the Body Control Module (BCM) which enables the fans through the PCM. The PCM enables the ground path for the three cooling fan relays. The relay (s) are used to control the high current flow to power the cooling fan motors.
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.
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 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.
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.
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.
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. A label is stamped on the fuse panel cover to identify each fuse for ease of replacement. Fuse box diagram. legend.
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.
Where are the fuses on a 2004 Jeep Grand Cherokee?
2004 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 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.
How do you replace a cooling fan relay?
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’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.
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.
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.
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.
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.
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.
Where is the fuse panel on a Jeep Cherokee?
The interior fuse panel is located in the passenger compartment on the left side dash panel behind the storage compartment.
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.
Where are the fuse panels on a Jeep Grand Cherokee?
Here you will find fuse box diagrams of Jeep Grand Cherokee 2005, 2006, 2007, 2008, 2009 and 2010, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.
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 are the symptoms of a bad cooling fan relay?
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.
If the fuse blows again, have the vehicle inspected at a qualified service center. The interior 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.
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.
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 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.
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.
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 are the fuses on a 2003 Jeep Grand Cherokee?
2003 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.
What to know about the Jeep fan relay test?
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. Real Life Case Study. You can find this tutorial in Spanish here: Cómo Probar El Relé PWM del Ventilador (4.0L Jeep) (at: autotecnico-online.com ).
Where is the cooling fan relay ( or switch ) located?
Where is the cooling fan relay (or switch) located. I want to replace it in an attempt to get the fans to work again. Where is it located. The radiator cooling fans will not come and it causes overheating. It may be the fan relay or switch (whatever it is called).
When to replace the fan relay in a radiator?
3.4L V6 I replace the water pump, the thermostat (twice), the cooling senor (twice) replace all fan relays, but the fans will not come on till it reach 220-225. What else can I try? Is there another senor somewhere?
Why is my radiator cooling fan not working?
The radiator cooling fans will not come and it causes overheating. It may be the fan relay or switch (whatever it is called). My problem is trying to locate it. Is it near the battery or where is it so I can install the one sold to me by Autozone automotive parts store.