The Gem Module is a relay that control the majority of the electrical functions in late model ford vehicles
The gem module on an 03 Ford Explorer is under the dash. It is just to the left of the radio.
where is the gem module located on a 2002 ford f 250
The GEM is $1200.00 plus labor. Better ideas by Ford
Check out http://www.wolfsourworldcheats.blogspot.com to find out what the latest Gem Codes are!
I believe the GEM is in the center stack of the dash and that the radio has to be removed to gain access
Generic Electronic Module
The GEM in a ford windstar is located up inside the dash, above and to the left of the gas pedal. it's held in with a single bolt.
in the fuse panel under dash
I'm not sure if your Ranger is the same , but on my 1995 Explorer with a similar dash the GEM is in the center stack of the dash , to the left of the radio On a 1997 Ford Ranget 4x4 the Gem module is located as stated above. Behind the radio and to the left.
I believe it is in the center stack of the dash , and that the radio is removed to gain access to the GEM
http://en.allexperts.com/q/Ford-Repair-811/Fuse-Box.htm