AboutDennis W Expertise I am a retired Ford master tech specializing in electrical, climate control, emissions, driveability, chassis, brakes, and any light repairs. Currently employed by an independent shop that appreciates my knowledge and abilities.
Cannot answer transmission or parts questions, these are not areas of my expertise.
Experience 32 years of auto repair, diagnosis, and emissions testing, in service staions, independent garages, and 20 years with Ford dealers.
Organizations National Street Rod Association (NSRA)
International Automotive Technicians Network (IATN)
www.blueovaltechs.com
IAMAW (retired)
National Street Rod Association
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Education/Credentials Riverside City College Automotive technology program
Ford Master Tech Certified Engine and Chassis Master (Over 500 hours)
ASE Certified in 7 categories
6 years training in Union 76 Pro-tech program
Awards and Honors 4-time Technician of the Year at Almaden Lincoln Mercury
Ford Master Tech
Union 76 Pro-tech Master tech
Question QUESTION: 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.
Answer The 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.
