Porbably the radiator cooling fan relay switch is bad; check it; this is
located behind the bumper on the passenger side underneath the
headlight.
There are two ways of accessing it:
* Remove the bumper.
* Remove the pasenger side headlight assembly and cut a hole in the
plastic underneatch click on the
link below for more info:
WJ site - Cooling RelayThe 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 helps (remember rated this).
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