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Jeep Grand Cherokee A/C Heating Ventilation

407 messages,  Last post on Feb 21, 2010 at 5:57 AM

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What is this discussion about? Jeep Grand Cherokee, Heating / Cooling, SUV

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#91 of 407 2001 Grand Cherokee fan runs after shifting into 4 wheel drive by savagejeep Feb 25, 2007 (1:05 pm)
Hi we have a similar problem to those that have already posted! However, a little quirker than the previous posts! The cooling fan stays on continously only after shifting into 4 wheel drive while stopped (not on the fly).   We had to jump the car because the fan caused the battery to die. Then we noticed that when we removed the cooling fan relay that the lowbeams did not work. However, once we replaced the relay with a new one and took the car out of 4 wheel drive (on the fly) the lowbeams once again worked and the cooling fan turns off!   Does anyone know if the relay has to do with either the shifting of the 4 wheel drive or the lowbeams?? Also has anyone who owns a 2001 grand cherokee found a good website with diagnostic codes. If so I would appreciate the info!!   Thanks,   Mark Replies to this message: champ218 (Mar 01, 2007 4:21 pm)
#92 of 407 Re: 2001 Grand Cherokee fan runs after shifting into 4 wheel drive [savagej by champ218 Mar 01, 2007 (4:21 pm)
Replying to: savagejeep (Feb 25, 2007 1:05 pm) Here is a link to fault codes for the GJC: http://www.wjjeeps.com/faultcodes.htm   As far as the problem with the cooling fan staying on after the car is shut off, I had the same problem a while back. Now the cooling fan wont turn on at all. I took it to a diagnostics place and they said it was my Powertrain Control Module (PCM) Hope this helps everyone out.
#93 of 407 Re: COOLING FAN NOT TURNING OFF [bbernander] by pahefner01 Mar 08, 2007 (9:11 pm)
Replying to: bbernander (Jun 10, 2006 8:04 pm) Another participant that thinks you should check the relay. There are not that expensive and cheap insurance against overheating. Replies to this message: pahefner01 (Mar 14, 2007 7:29 pm)
#94 of 407 Re: COOLING FAN NOT TURNING OFF [pahefner01] by pahefner01 Mar 14, 2007 (7:29 pm)
Replying to: pahefner01 (Mar 08, 2007 9:11 pm) I would also check the relays under the hood first. They are not expensive, easy to get to and fail at a rather alarming rate.
#95 of 407 Re: Fan comes on when 2003 Saturn L Series is cranked! [susanproctor1] by saturncat Apr 03, 2007 (1:10 am)
Replying to: susanproctor1 (Feb 08, 2007 8:53 am) If it's defective, then perhaps the dealership will fix it for free. The warranty ran out a YEAR ago...and I have been having numerous problems ever since. The closest dealership to me is about 40 miles away. I doubt I will buy another car where there is no local dealership!   Thanks for the info.
#96 of 407 Re: COOLING FAN NOT TURNING OFF [quadring] by spider16 Apr 26, 2007 (6:20 am)
Replying to: quadring (Sep 30, 2006 7:21 pm) Can you give any dimensions / coordinates for where to cut the hole to access the relay? how large a hole? Replies to this message: tuggajb (May 22, 2007 6:51 pm)
#97 of 407 Re: COOLING FAN NOT TURNING OFF [tidester] by skippytcg May 22, 2007 (6:41 pm)
Replying to: tidester (Jun 10, 2006 10:31 pm) I was in another forum and they said there is a relay located by the passenger headlamp. they said it is a little bit of a pain to get to but that may help. Replies to this message: spider16 (May 22, 2007 8:04 pm)
#98 of 407 Re: COOLING FAN NOT TURNING OFF [spider16] by tuggajb May 22, 2007 (6:51 pm)
Replying to: spider16 (Apr 26, 2007 6:20 am) link to photos of relay replace ment   http://www.carspace.com/billnick/Albums/Jeep%20Overheat%20Fix%20Fan%20Relay%20Re- /
#99 of 407 Re: COOLING FAN NOT TURNING OFF [skippytcg] by spider16 May 22, 2007 (8:04 pm)
Replying to: skippytcg (May 22, 2007 6:41 pm) That is the secret. The fan relay is located under the passenger headlight. i just replaced mine . Problem solved. The trick is you must remove the headlight then cut about a 3 inch round hole in the shroud under the light to access the relay. The engineers strike again.Just use a hole saw and you can leave the hole open after finished.If you need more info contact me.
#100 of 407 Re: COOLING FAN NOT TURNING OFF [bbernander] by kzoojeep Jun 01, 2007 (2:33 pm)
Replying to: bbernander (Jun 10, 2006 8:04 pm) Easy fix it's the fan relaycontrol module(AKA relay) behind the front bumper on the passenger side. very common problem the hardest part is getting to it, you have to remove the front bumper to do the repair.

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