GEM and Electrical Systems

[Geezer1]

98 Ranger XLT 4x4. Very basic truck with no A/C. cruise control, power windows, etc. First the winndshield wipers, then speedometer, and 4x4 control stopped working. Suspect the Generic Electronic Module (GEM). Cleaned the circuit card with alcohol and checked all fuses. Finding a replacement GEM for this vehicle is not easy nor I am sure one will work. Any suggestions? Also, where can I find a complete and accurate electrical schematic for this vehicle?

 

[franklin2]

1998 Ford Ranger Electrical Vacuum Troubleshooting Diagram Wiring Shop Manual 22 | eBay

Hello thanks for looking at my items for sale you are bidding on the item in the pictures. It’s used but in good working shape. If you have any questions please feel free to message me. Thanks Nate

www.ebay.com

1998 Ford Ranger Truck Wiring Diagrams Schematics Drawings Color Codes | eBay

It shows the various electrical circuits, fuses, distributor, etc. It also includes electric windows, seats, wipers, etc.".

www.ebay.com

You can also go to your local library, get a library card, and many local libraries subscribe to Chiltons online repair. Their diagrams are ok, but they are free.

Here are the different GEM modules you could have that year. You need to get the number off your GEM.


Multifunction, (behind center dash), 4x2, remote keyless entry, ID F87B-14B205-DA
Multifunction, (behind center dash), 4x2, remote keyless entry, ID F87B-14B205-DB
Multifunction, (behind center dash), 4x2, remote keyless entry, ID F87B-14B205-DC
Multifunction, (behind center dash), 4x2, remote keyless entry, ID F87B-14B205-DD
Multifunction, (behind center dash), 4x2, w/o remote keyless entry; gasoline, ID F87B-14B205-AA
Multifunction, (behind center dash), 4x2, w/o remote keyless entry; gasoline, ID F87B-14B205-AB
Multifunction, (behind center dash), 4x2, w/o remote keyless entry; gasoline, ID F87B-14B205-AC
Multifunction, (behind center dash), 4x2, w/o remote keyless entry; gasoline, ID F87B-14B205-AD
Multifunction, (behind center dash), 4x4, ID F87B-14B205-EA
Multifunction, (behind center dash), 4x4, ID F87B-14B205-EB
Multifunction, (behind center dash), 4x4, ID F87B-14B205-EC
Multifunction, (behind center dash), 4x4, ID F87B-14B205-ED
Multifunction, (behind center dash), 4x4, ID F87B-14B205-EE
Multifunction, (behind center dash), 4x2, w/o remote keyless entry; electric

 

[RonD]

+1 ^^^

Welcome to TRS

The GEM is what all 3 of those issues have in common in a 1998-2000 Ranger
Other than the GEM they don't have any wiring, fuses or relays in common

You could check the wiring at the GEM to make sure its getting 12v power from the 3 fuses(10, 20 and 25) at its connectors
Also that it's 3 grounds are good
It could be all sections of the GEM are not turning on

Don't recall ever seeing a GEM schematic