Question about 2000 Jeep Grand Cherokee

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How can i tell if my radiator fan relay is blown

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You will need to hold the engine at 2000 rpm in park till the temp gauge comes up too temp and then beyond. If the fan doesn't kick on and the engine is getting very hot try to turn on the a/c that usually turns on the fan but don't let it over heat.The best thing to do is to just change the fan relay (they are known for going bad) which is located behined the passenger head light inside the passenger fender.It is a pain to get to.Some like to remove the head light assembly and cut a hole in the sheet metal behind it to access the relay easier since they like to go bad.other than that you will have to go through the passenger wheel well by removeing all the plastics to get inside the fender.

Posted on Jan 31, 2010

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Posted on Jan 02, 2017

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ZJLimited
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SOURCE: Radiator fan not operating, radiator fan relay

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Jeep WJ Grand Cherokee

The Radiator Cooling Fan Relay Switch for a 2003 Jeep Cherokee is located behind the bumper on the passenger side underneath the headlight.
There are two ways of accessing it:
1. Remove the bumper.
2. Remove the pasenger side headlight assembly and cut a hole in the plastic underneatch click on the link below for more info.

The relay seems to be a common replacement item for this vehicle. One cause of the failure is that the relay overheats, per a note inserted in the replacement part packaging.

The cutout method is used by dealers. In one vehicle, the relay failed again after 40,000 miles or so. While replacing the relay it was noted that it was secured by one screw and it was not tight. This did not provide thermal contact with the chassis which helps cool the relay. The cause of the second failure was likely due to improper installation. Trying to work through a cutout would seem to make it difficult to get both screw isntalled securely. Furthermore, the new parts today use steel pop rivets for installation to help guarantee it will maintain proper thermal contact with the chassis. The pop rivets cannot be isntalled without removing the bumper.

It is not difficult to remove the bumper and grill to get to the relay. It sounds like a big deal but you are talking a half dozen screws and less than a dozen plastic rivets. The act of cutting a hole and working in cramped quarters has to be more difficult and it does not provide as quality a job.

Hope help with this (remember rated this post).

Posted on May 24, 2010

  • 7353 Answers

SOURCE: Radiator fans will not run. Cannot find the

left bottom of radiator supprt area. about the size of a matchbook.

Posted on Jun 11, 2010

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