Passenger side engine compartment, located near the a/c components, a single heavy gauge wire, looks to be yellow color (maybe with a blue or green hash?), no mating plug to be found.
Possibly the underhood Lamp connector? Check for 12v.
Hood lamp is my guess too.
Compare the two plugs in this pic. I think the blueish arrow indicates the hood light, the yellow indicates the plug I'm trying to ID. It's a little bigger, and darker grey.
They're both 12V key off.
What year / engine is this? On my 88 V8 car, the light gray connector is the hood lamp, no other single-wire connector in that area.
'85 tc
If nobody else finds it for ya, I'll look at my 85 XR-7 next time I am over to the building where it's sleeping for the winter...
I don't have my EVTM handy so I can't tell you what it is, but I looked through some pictures I have of my dissassembly process and mine is (was) connected to a plug that goes into the passenger compartment grommet right above the HVAC support stud.
Brent
Yeah, I don't remember what it does but I can tell you that my car couldn't start without those connectors being joined.
Hmmm.
Mine will definitely start without it connected. I don't see what it would connect to. Did Ford leave unused plugs lying about the harness? I wonder if it's for an option mine didn't have (and Eric's did)?
I've got the same wire coming through the firewall, It connects to the starter solenoid.
But as for behind the firewall... I'm not sure.
It's also different on the 3.8, Due to the fact that it does not have the coupler. unless its shoved down in the firewall...
Does the rear window defroster work?
I think that wire may be the power feed to the rear window defrost control.
softtouch, no RWD