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Cooling fan not working

Tiny
DENOTS74
  • MEMBER
  • 2 POSTS
  • 1990 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 236,856 MILES
Engine Cooling problem
1990 Jeep Cherokee 6 cyl Four Wheel Drive Automatic 236856 miles

I got a 1990 jeep cherokee and the electric cooling will not come on, but if put 12volts directly to fan if runs great can not find fuse or what ever feeds voltage to the fan
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Monday, May 29th, 2017 AT 3:58 PM (Merged)
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Check the relay it is located on the Left Fender Panel in Front of the Washer Bottle.

If that checks out then most likely its the Coolant Temp Sensor and is located at the top front of cylinder head.
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+1
Monday, May 29th, 2017 AT 3:58 PM (Merged)
Tiny
DENOTS74
  • MEMBER
  • 2 POSTS
Thankyou for your time and effort it is good to see that thre people in this country who will still help people when they need it have a great day
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Monday, May 29th, 2017 AT 3:58 PM (Merged)
Tiny
FLINGER
  • MEMBER
  • 1 POST
  • 2001 JEEP CHEROKEE
My wife has either a 2000 or a 2001 Jeep Grand Cherokee. The AC blows cold when at sustained high speeds but it blows hot at idle and the engine begins to overheat. I read about the cooling fan and I checked to see if it was running with the AC on, and it is not. I can spin it with my fingers so I know it isn't obstucted. It also has a rattle/jingle type of sound that I notice at slow speeds like in a parking lot. Does it sound like I need a new fan? Is that something I can do myself? I am fairly mechanical. Does it require special tools?
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Thursday, August 15th, 2019 AT 7:21 PM (Merged)
Tiny
DPWD23
  • MECHANIC
  • 136 POSTS
First check the connections to the fan. If you can rig up a set of jumper wires with alagator clips you can test the fan by touching the wires directly to your battery for a second or two, just make sure you don't have anything in the way of the fan. They can cut your finger off, or hurt you pretty bad if not careful.

If it works, check fuses.
If all that fails, report back, and we'll go from there.
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Thursday, August 15th, 2019 AT 7:21 PM (Merged)
Tiny
POKERCHEF5
  • MEMBER
  • 2 POSTS
  • 2000 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 108,000 MILES
I have a 2000 Jeep Cherokee Grand Ltd. And my radiator fan does not spin. I check the relay and the cooper connection looks to be in one piece. The fan spins freely whwen I turn it. Do I need to replace the fan and if so what would be an estimate cost to replace/repair?
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Thursday, August 15th, 2019 AT 7:21 PM (Merged)
Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello,

How did you check the relay?

I ask this next question because some people look up relay location and relays for a cherokee and not the grand cherokee. And they are different.

Were was the relay located?

Did you hot wire the fan directly to the battery? If so did it come on... If not then most likely you need a coolant fan motor...

Here is a picture of the relay for a Grand Cherokee..


https://www.2carpros.com/forum/automotive_pictures/188069_coolantfanrelaychryslerdodge_4.jpg



This is the location of the relay....Behind bumper on passenger side


https://www.2carpros.com/forum/automotive_pictures/188069_01grndcherokeeradfanrelay_2.jpg

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Thursday, August 15th, 2019 AT 7:21 PM (Merged)
Tiny
VNAPP
  • MEMBER
  • 6 POSTS
  • JEEP CHEROKEE
97 jeep cherokee country, 6cly, 4.0L, 100000, cooling fan keeps cycling, runs for 5 second shuts off, waits about 20 sec, runs 5 sec then off, is this normal operation? Temp. Indicates 195 deg. To 205
consistantly at idle.
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Thursday, August 15th, 2019 AT 7:22 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Is it running with the AC comp
watch the clutch on the AC comp. If its cycling on and off
it may be low on AC gas 134A
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Thursday, August 15th, 2019 AT 7:22 PM (Merged)
Tiny
VNAPP
  • MEMBER
  • 6 POSTS
Is it running with the AC comp
watch the clutch on the AC comp. If its cycling on and off
it may be low on AC gas 134A[/quote:b0326bca59]

the AC was off, I had the heater on. Should the fan on cycle be longer?
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Thursday, August 15th, 2019 AT 7:22 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
What really matters is what happens when you turn on the A/C? Does the fan stay on? Right now it seems to be controlling the temperature well!
Fan should run with a/c on. Other times it will cycle!
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Thursday, August 15th, 2019 AT 7:22 PM (Merged)
Tiny
VNAPP
  • MEMBER
  • 6 POSTS
[quote="merlin2021"]What really matters is what happens when you turn on the A/C? Does the fan stay on? Right now it seems to be controlling the temperature well!
Fan should run with a/c on. Other times it will cycle![/Quot
Just thought the fan was cycling too much on and off and only stayed on for 5 sec., Thought mayby some temp sensor was going or what ever controls the fan cycles. Sounds like the fast on cycles may be normal? What is normal ops for fan cycles with AC off?
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Thursday, August 15th, 2019 AT 7:22 PM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Even so u have the heat on the AC COMP STILL CYCLE.S
CHECK THE CLUTCH ON THE FRONT OF THE COMP AND NOTICE IF ITS OPERATING WITH THE FAN
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Thursday, August 15th, 2019 AT 7:22 PM (Merged)

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