fcrm is the controller for pcm power, fuel pump power, fan power, and a/c power. not sure what it stands for exactly. there are fuses and relays inside the fcrm. you will have to take the cover off to run the hot wire(heavy gauge red). there are 3 heavy gauge wires, black, red, orange. the red goes to positive(+) batt post. black goes to negative(+) batt post. and orange is the power for the electric fan, it has a 40 amp relay and fuse built in the the dunne rite fcrm, so you can hook it up directly to the positive fan wire, or run a relay for the fan to keep the amp load off the fcrm(thats what i did, just use the orange wire from the dunne rite to a trigger for a relay mounted under the hood.) fuel is controlled off a FPDM this is a actual ford part, dunne rite should have sent you a extra harness, plugs into the dunne rite main harness under the PCM and you run the harness back toward the rear of your car and mount the FPDM and then run the pump power wires from there. also in this small harness is a couple other wires, the tach wire is the yellow wire(hook up to tach or tach adapter) orange is for the a/c selector switch, and on my dunne rite was a white wire, this wire goes to the ignition switch, positive power when key is in start and run. let me know if there is any differences or questions, ive talked to dunne a few times and they are vague about things, some wires on my harness were assembled with the wrong color so it made me question a few things so i called to clear them up, and they still have not returned my email on how to wire the a/c correctly.
