ESOF either GEM or motor how do I tell?
I have a 99 f250 with ESOF. I just bought the truck and when I got it it would not go into 4 wheel low. No deal so I bought it. Well, I got it home and replaced the glow plugs. Started it and drove around, tried 4 wheel drive and it would not come out of 4H? So I crawled under and hooked 12 volts to the motor and put it back in 2H(motor works???).
I have checked the switch and it is good. I have 12volts supply at the relays, but no clicking with the switch.
Reason I suspect the GEM
1.) I also have an intermittent problem with the "off" light on the passanger side air bag which flashes 27 on the airbag light.
2.) I have a ABS light?????
3.) Intermittent door ajar.
Does anyone know how/can you test a GEM?
Does any one have a print of the wiring diagram so I can ring out the connections?
I have read that the GEM is either behind the glove box(did not see) or behind the fuse panel(I assume the internal) any know for sure?
Finally, where can i get a GEM reasonable? Preprogrammed would be good.