Question about 2002 Ford F150 Regular Cab

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My battery dies with the engine off in my 2001 F-150. At one point the fan that blows into the cab would run with the engine off. What could be the problem?

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This sounds like an issue some 97-03 MY F-150s have, where a windshield ( or roof panel ) leak down into the area by the Cab fuse panel, and soak the GEM ( Generic Electronic Module ), causing all sorts of strange problems.

Depending on how long this has been happening, resealing ( or replacing if bad enough ) the windshield is in order, and dry out of the dash area with a small space heater can cure the issue.

If this has been happening too long the GEM to Cab fuse panel ( it is bolted to the back of the cab fuse panel ) connector pins can be discolored / corroded and the fuse panel / GEM needs to be removed and the pins cleaned ( hard to do on the female connector ).

Here is the manual section on GEM removal for the 1997, the process is very similar on the '02 MY F-150

Posted on Nov 12, 2010


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