QuestionQUESTION: The 1997 Expedition that I bought new on 12/24/1996. The car has 130000 miles and the wipers and windows stopped working on the same day. All of the fuses are good and relays have been checked by interchanging. Where else do I look? My other problem is the Check Engine light is on and the engine is missing.
ANSWER: One thing in common with the wipers and windows is the GEM module, checking for codes in this module might help narrow the diagnostics for you.
If the CEL is on and engine missing, you need to have PCM codes checked to see if there are misfire codes. Depending on which engine you have, could be worn out plugs, bad plug wires, or bad coils if it is a 5.4 engine.
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QUESTION: Ok, I will check the GEM module but where is it?
Changed all of the plugs and it seems to be running great.
AnswerThe GEM is mounted to the backside of the fuse panel under the left side of dash. I would not suggest replacing it until checking for codes.
Expeditions and F series trucks had problems with the windshield leaking on the left side causing water to drip on the GEM and fuse panel, most of the time you can see the result as green corrosion on the connectors between the GEM and fuse panel. When this happens all kinds of electrical problems can occurr.
