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1998 Ranger 4.0 G.E.M Module replace..


raggedyann

Well-Known Member
Joined
Feb 20, 2013
Messages
87
Vehicle Year
1998
Transmission
Automatic
this morning was gonna use 4x4 but no lights when I flipped switch, no 4x4.
no wipers, no power windows or dome light.
I replaced the GEM from a 1998 Explorer , now I have my wipers, dome light, and power windows. but the O.D light flashes and I drove it a couple miles and 4 high and 4 low 4x4 light flashes now and then.

the numbers on the GEM box are different but plugs all the same.
wandering if they wont interchange ??? or will I need one identical ??

I replaced one on my wifes 2001 ranger several year ago and DID NOT require reprogramming. worked perfect.
 
well, I removed the one from the Explorer and reinstalled original, everythings working ? hum, something stuck, or what ? but glad everythings working again !!
 
I had a GEM problem on my 02. Just weird stuff would happen off and on when key went from run to start or back to run.

I had to replace the battery (just very old and weak). All the GEM problems just plain went away. Don't know if the low voltage from the old battery at start up or just resetting the GEM when I replaced the battery that fixed it.

That was almost a year ago, Ed
 
GEM modules are programmable, so they are programed for the options the vehicle has when made.
Swapping GEMs from similar vehicles can be fine, if not a match then not fine.
Ford dealers can reprogram GEM, not sure on the cost.
 
Enjr, low batt voltage will cause the GEM to go out. when my wifes 2001 went out, the battery was almost dead and I tried cranking with the weak battery is when it went out.
 

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