Question about 2004 Jeep Grand Cherokee

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Over heating at idle

2004 Grand Cherokee 90,000 miles will over heat at long idles, the low fan comes on with A/C, The high fan does not engege, Where is the fan relay swith? I pulled the passanger headlight cut and drill severlal holes in plastic and it is not there.

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  • Malm95 Aug 09, 2008

    I found another person with the same problem as me, we both have an "S" in our VIN. One person told him his Jeep did not use the PWM, ( what I called a realy that was suppoed to be under the headlight) Not sure what that means but needless to say I pulled the two relay in the PWC, swaped them, pulled the 40a fuse and put the same one back in. The Jeep now runs and idles in gear at 210 or just below. So that is normal. Not sure what I did to fix it but its working for now.

  • bjb1964 Mar 13, 2009

    I am dealing with the same issue locating the relay on my 2004 Jeep Grand Cherokee. I did pull the bumper and the relay is not there. I see the factory machined holes where it would normally be located. I also have a "S" in my VIN and the production date is 4/04

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You did exactly what I would do (and the dealer repair guy for that matter) by going after it thru the bottom of the headlight housing. But if you aren't having any luck finding it then I would go ahead and remove the bumper so you can have a better look at whats behind there. I have a 2004 cherokee too and that's where mine was. Hope this helps!

Posted on Aug 08, 2008

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