Whoa! -Confusion with '71 alternator wiring W/idiot lights

[averagef250]

I have a '71 F-250 4x4 that has the idiot light dash in it, I must assume the idiot lights make a HUGE difference in the wiring harness because I have 4 complete wiring harnesses from 70-72 trucks with gauges and they are completely different from this '71 harness. Lucky for me this truck hasn't run in a decade or better and has had some real keen past owners that cut alot of the wiring putting an engine in it.

I have what I believe to be most of the correct alternator wiring harness that plugs in by the starter relay and hooks into the regulator, but the wires that go to the alternator have been cut. I figure the fat wire must be the "batt" wire, but what are the other three? The other three wires are black/white, orange and black w/red stripe. Thanks for any help.

[averagef250]

If anybody has an idiot light truck could you take a quick peak at the wires on the rear of the alt? Thanks.

[fordman]

i was hoping someone would have helped you by now but i do some checking on this and see what i can figure out., i have a similar problem about a wire that is missing and i don't know what it is but its been cut out in the same area. whjat color is your big wire? yellow?

[ICEMAN6166]

ok, here goes:
fat wire is + or batt
orange is f or field
blk w red stripe is ground
the other wht/blk is hooked to a little round condensor? on the back of some alts.
not needed if you dont have that.

[averagef250]

THANKS A MILLION!!!! You saved the day!