Question about 1998 Ford Expedition
Posted by Anonymous on
Did you hook up a scan tool an see if it communicates with the instrument cluster an the GEM module ! An check for DTC'S in the GEM !
Inspection and Verification
NOTE: When installing a new instrument cluster, reset the PCM ID and carry out the PATS parameter reset procedure. Refer to Instrument Cluster Parameter and PCM ID Reset Procedure in this section.
Posted on Mar 31, 2015
Check the pcm or the ecm plugins or the ignition switch that powers the accessory power make sure power is going in the swich and back out to the accessories when the key is in the run position
Posted on Mar 31, 2015
The dash lights are not necessarily a part of the gauge package because they will light up when you turn on the parking or headlights regardless of the engine and its gauges being off. Look up a search on the year and model of your vehicle with the words "wiring diagrams". A collage of answers will emerge.
I suspect that since each gauge is getting an impulse from a separate sender, like oil, water, or temperature and RPM, the only common thing is the ground wire. Why not attach another ground wire to the dash cluster? If any signals are getting through they should react if they are connected. Leaving an extra ground wire attached will not hurt anything.
Check the wiring diagram for sister functions that may be hooked on the dash gauges like some low voltage lights and see if those parts are dead.
Also check for relays or even your ignition switch.
Posted on Mar 30, 2015
Just out of curiosity, did you check the fuses under the steering wheel to the right as well as the fuses under the hood drivers side?
Posted on Mar 30, 2015
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Posted on Jan 02, 2017
I had a similar problem. In my 1966 Mustang gas tank, the fuel pick-up was on a "float." My float developed a hole, filled with gasoline, and sank to the bottom of the tank, therefore, the gauge always read empty, but the car ran well. All the other gauges of course worked correctly. The repair was a relatively simple soldering job (after removing the float from the tank), but if that is indeed the problem, ensure all the gasoline is drained from the float before beginning the soldering job.
Posted on Dec 05, 2008
SOURCE: GEM module replacement
try a salvage yard that has an expedition or an f150 pickup and take the parts off and install in yours disconnect the negative side of the battery and you shouldn't have to have it reprogrammed
Posted on Jan 25, 2009
SOURCE: dash gauges not working
Check the large multi-pin connector in the electronics bay in the engine compartment. The bay is a fairly large black plastic box on the driver's side. Open it and disconnect the largest connector inside (one screw). Spray electrical contact cleaner on the pins and re-mate the connector. This worked on my '99 with the exact same problem. You can find other examples of this with a Google search. It may not solve your problem (could also be a wiring harness problem), but it is incredibly simple and worth a shot.
Posted on May 18, 2009
best bet is get a WIRING DIAGRAM. you should have current (12 volts) on both sides of the fuse that works the tailights.if not there is probably a broken wire or a shorted wire leading up to the fuse. you kinda need the wiring diagram so u can see in which order the current "flows" which will help point u in the right direction.
Posted on Sep 06, 2009
This 1997 Ford F150 needs the GEM module changed due to multiple conditions. To see testing that lead to this repair please click here. The GEM module is located t the rear of the interior fuse box.
The first step is to remove the trim panel that covers the gap between the upper side of the steering column and the dash. It just unsnaps from the dash. It makes it a little easier to remove if you move the shifter all the way down to drive 1.
With that out of the way the lower dash cover can now be removed. Most of the screws have 7 mm heads but there are two that have 8 mm heads.
Those two are at the lower edge of the fuse box.
One wiring harness needs to be disconnected from the panel.
Now the screws for the fuse box can be removed.
The wiring harnesses can be removed from the back of the fuse box. Two 10 mm headed bolts at the center of each connector.
Next remove the tube brace from around the bottom of the steering column. Four fasteners with 13 mm heads.
Now wiggle, pry and twist the fuse box and GEM module assembly down.
After the assembly is down far enough unplug the remaining harness connectors from the GEM module.
The assembly is now free of the vehicle.
The GEM module is held to the back of the fuse box by three phillips headed screws.
Easy to remove Now.
With the three screws removed the GEM unplugs from the back of the fuse box.
I put it all back together and checked my repair for power to the driver's power window switch.
Posted on Jan 10, 2012
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