I have a follow up question: I was told that I needed the GEM module, however, if the air suspension module in on the left of the radio opening (I have the radio out and the opening clear, the center console out, and the dash pulled down for access behind the dash) and that operates the air suspension; the engine PCM controls the transmission; with the transfer case being in default "Auto", and I have an 'Auto-4Hi-4Lo' switch which I will install to operate the transfer case to switch from 'Auto'' to '4Hi' or '4Lo' as I may need - what does the GEM module do that I would need it for?
The person who told me that I needed the GEM module may not have fully understood that I was completely removing the body and separating it from the chassis, so I would not need any 'body' controls, alarms, monitors, etc The person who told me I needed the GEM module was the Service Manager at the local Ford dealership, but then our discussion continued and he later made the comment 'Oh, I didn't know how much you were taking off and disconnecting.' - at the time I didn't tie that to maybe not needing the GEM module. The air suspension module, yes, that makes sense because the chassis has the rear air load leveling suspension.
I'm just trying to make sure I understand why I am taking what I am taking so that I will be able to connect things back up to operate the chassis without the body.
I won't need any: anti-theft, no alarms; lights (head/stop/turn/hazard/etc); no horn; etc; which would be controlled by the GEM and the body electronics. This is because I am putting the body of another vehicle on the chassis and that body will already have all those items self-contained within itself.
The only "connections" between that body and the Explorer chassis (other than body mounts) will be: 1) steering wheel shaft connection to chassis steering shaft; 2) brake pedal connection to the chassis brake system using the chassis master cylinder and vacuum booster; 3) accelerator pedal connection to the engine's cable; 4) transmission gear selector lever connection to the transmission shift cable; 5) parking brake connection to the chassis parking brake cable; 6) a battery positive connection to the body; 7) chassis ground connection from the body back to the battery. That will (basically speaking): power the body lights and etc, start the engine, drive the chassis, steer the chassis, stop the chassis.
There were four connections from the body down to the transfer case area from the floor under the driver's seat: one went to an air bag sensor on the driver's side frame rail - I don't need this one; one went to the transfer case; two went towards the back (I presume one is for the fuel pump, sending unit, etc; and the other one is for the air suspension).
With the engine PCM controlling the transmission, and I have the wiring harness from the engine compartment and the power circuit fuse box - all to reconnect the power circuits, engine, engine PCM, etc, back together by reconnecting the connections to each other and for the anti-lock braking system.
What does the GEM module control that the chassis needs?
Thank you for your help in understanding what is needed and what it does.
Saturday, January 13th, 2018 AT 9:01 PM