Radiator Fan Control Relay

Tiny
GRFRAZ
  • MEMBER
  • 2004 JEEP CHEROKEE
Engine Cooling problem 6 cyl Two Wheel Drive Automatic 940000 miles

I have a 2004 Jeep Grand Cherokee and I need to replace the fan control relay. My problem is that I can not find mine, it is not where the chilton book says it is.
It is not located under the passenger head light, I have the entire front end apart and there is no relay located there. There are holes in the sheet metal where it should be, but it is not there. Is there another hiding place for this relay?

Notice the radiator fan relay control just above the low and high speed fan relays, my fan runs on high from engine start thus not allowing engine to come up to operating temperature. And my MIL is on indicating P01489 and P01490, both of which are talking of this PWM relay. I am sorry for the long question but I have a new control relay that was purchased using my 4.0L engine size.
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Monday, November 17th, 2008 AT 1:55 PM

35 Replies

Tiny
RASMATAZ
  • MEMBER
If its a 4.0L engine its located in the power distribution box-see below 2-fan speed relay involved.

Here is the wiring diagram and relay location (below) along with some easy guides to help you with the testing.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and in case the motor is bad which happens alot

https://www.2carpros.com/articles/replace-electric-fan-motor

Please let us know what happens so it will help others.

Cheers,
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+20
Monday, November 17th, 2008 AT 2:48 PM
Tiny
RASMATAZ
  • MEMBER
Here is the fan control module (below)

It will show up on the cooling fan EWD as I've provided.

P1489. High Speed Fan Control Relay

P1490. Low Speed Fan Relay Circuit

Above these 2 relays is a hydraulic cooling fan module it is not a relay and only applies to 4.7L engine.

The coolant temperature sensor feeds the computer the engine temperature. The computer decides whether only one fan is needed or 2 fans depending on engine temperature and AC load-Have your computer tested its jobs is to energize the appropriate relay as needed.
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Tuesday, November 18th, 2008 AT 12:32 AM
Tiny
NICE7709
  • MEMBER
Hi for the person that was looking to find the radiator fan control rely, you have to remove the front bumper cover to find it. And it is located under the passenger headlight after you remove the bumper cover. I had the same issue trying to find it.

Dean
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+6
Saturday, April 9th, 2011 AT 5:04 AM
Tiny
KEN
  • ADMIN
Here are the engine wiring diagrams if anyone needs them (below)
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Friday, August 25th, 2017 AT 3:38 PM
Tiny
BABIKOW1
  • MEMBER
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 105,000 MILES
Where is the cooling fan relay located.
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Tuesday, December 25th, 2018 AT 9:37 AM (Merged)
Tiny
BMRFIXIT
  • EXPERT
In the power distribution center next to the battery

See the guide below on testing relays, it will help

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Attached below you will find the wiring diagram for the cooling fan as well as the relay location
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-2
Tuesday, December 25th, 2018 AT 9:37 AM (Merged)
Tiny
ANITA PREWITT
  • MEMBER
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 10,300 MILES
Where is the relay switch for the radiator fan motor located?
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-1
Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Under passenger side head light mounting panel. Both headlights must be removed along with the hood latch and mounting bracket to gain access to relay. Grand Cherokee

Thanks for using 2CarPros. Com!
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-1
Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
DARRELL DALE
  • MEMBER
  • 1999 JEEP CHEROKEE
Engine Cooling problem
1999 Jeep Cherokee 6 cyl Four Wheel Drive Automatic

Were is the cooling fan relay on this model
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
INTERNETMECHANIC
  • MEMBER
It's in the power distribution center, under the hood.
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
MIKE WALTER
  • MEMBER
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
I need a schematic for replacing the relay for my mechanic. Can you help?
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-1
Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
OBXAUTOMEDIC
  • EXPERT
Hello,

I take it since your mechanic cannot find the relay it is a Grand Cherokee not a Cherokee. The relay is located Behind Bumper Facia, Below Right Headlight...


http://www.2carpros.com/forum/automotive_pictures/188069_01grndcherokeeradfanrelay_1.jpg



The relay on a Cherokee is located in the Power Distribution Box under the hood
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
RMEYER
  • MEMBER
  • 2001 JEEP CHEROKEE
2001 Jeep Grand Cherokee 4.0 6 cyl 85M miles. The car overheated the other day and threw a P1491 code causing the Check Engine light to come on. I was in heavy stop & go traffic. After letting the car cool down for 45 mins I proceeded to destination and the temp stayed normal, 210 degrees. I checked all cooling systems and all seems to work. The electric fan comes on when the AC is switched on and or when the engine reaches temp. The electric fan doesn't turn as agressively as I have experienced in other cars though. Normally they torque right up to speed, this one slowly gets there but doesn't move the air I thought it would. The fan blade moves freely with no binding so it's not seized up any. Could the fan be bad or maybe the relay can't handle the currrent the fan wants to draw> Anyone have any ideas?

Thanks

Richard
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
LOSONE
  • MEMBER
I think your vehicle has two relays one for slow fan speed and one for high speed. It also could be a clogged radiator. If you haven't changed the coolant from the factory, that is the problem as the OEM coolant dies after about 40K miles and turns to juck in the radiator.
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
RMEYER
  • MEMBER
I didn't realize there were two speeds to the fan. I unplugged the fan and ran a full 13 volts to it and it ran the same as it did when plugged in. I just wasn't happy with the fan speed and the amount of air it moved.
Thanks
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
SINGKET
  • MEMBER
  • 2001 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
Hello I'm just to resolve why my 2001 jeep cherokee when it's Idling the temp goes high and the fan won't come on at all trying to find if it's the relay or the heating sensor if there is
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
RASMATAZ
  • MEMBER
Your probable causes here could be the fan motor itself, fan relay, coolant temperature sensor or the engine temperature gauge switch and computer controlled of the fan relay-
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
LUV2RUN1553
  • MEMBER
  • 2000 JEEP CHEROKEE
Six cylinder four wheel drive automatic

What would cause the electric cooling fan switch not to work and where is it located?
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
MERLIN2021
  • EXPERT
Hello,

Here is the cooling fan wiring diagrams so you can see how the system works. There is no switch that runs it just the PCM and a relay with a fuse. Here is the relay location and a guide to test the relay and power.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

and

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find.

Cheers
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)
Tiny
DRUSSELL45@COX.NET
  • MEMBER
I had this problem it was the relay. Thanks for the guides.
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Tuesday, December 25th, 2018 AT 9:38 AM (Merged)

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