Blower motor runs when car is off — Ford Expedition
Some 2000-era Ford Expeditions develop a condition where the blower motor runs when car is off. — Ford has experienced some leaking windshields. The water from those leaks can find its way into the fuse box (Central Junction Box) and the generic electronic module (GEM). When that happens, it corrodes the contacts and can cause shorting or goofy electrical gremlins
One of those gremlins is that the blower motor runs when car is off even with the key removed from the ignition. Head right for the fuse box and examine it for corrosion. Also check fuse #22. If you pull that fuse and the blower stops running, it’s evidence of an internal fuse box short. The fuse box must be replaced with a new one– It CANNOT be repaired (thanks Ford).
Oh, and fix the windshield leak or it will happen again.
© 2012 Rick MuscoplatPosted on by Rick Muscoplat