• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

GEM and Electrical Systems


Geezer1

New Member
U.S. Military - Veteran
Joined
Jan 22, 2024
Messages
1
Reaction score
0
Points
1
Location
Portland,OR
Vehicle Year
1998
Make / Model
Ford Ranger
Transmission
Manual
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

Well-Known Member
Joined
Dec 24, 2019
Messages
3,411
Reaction score
1,752
Points
113
Location
Virginia
Vehicle Year
1984
Make / Model
Bronco II
Transmission
Manual


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

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,363
Reaction score
8,369
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
+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
 

Attachments


Sponsored Ad


Sponsored Ad

Staff online

Today's birthdays

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Shran
April Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top