bulkhead wiring question

[D.E]

Upon reinstall wiring the bulkhead plug has a orange wire in the left side bottom of the bulkhead plug that I can't remember where goes under hood.I checked with a continuity tester and found it has no con anywhere.I did rewrap all the harness under dash and hood and can't seem to find out where that wire goes.Bought a wiring diagram from Ausley but not to good pics of that part of harness.Thanks for help

[stangeba]

It may help to list:

- Year

- With or W/O A/C

- Engine

Only orange wire that comes to mind on my 71 350 NO A/C is for the heater fan mtr.

[bobsmc]

picture is worth a thousand words.

i agree with bruce orange wire is for heater.

[Sam (Bones)]

orange wires are usually constant 12 volts, it may aslo be for a accessory your car doesn't have

[monte70car]

I have that same wiring book for a 70 and I could not even tell you were its at rather its in the house or out in the garage with the rest of the books. As other have already said it sounds like the blower motor wire for a non a/c car.

[D.E]

71 with factory A/C when I couple connector together outside on bench try to run a continuity tester to all wires and this wire has no continuity anywhere.If you look on fusepanel side of bulkhead they are no pins fro that wire.I do seem to remember a inline fuse up at the a/c box maybe when I put it all back on firewall it will come to me.Don't know how to add pis not a computer person.If anyone has a close up pic of that part of firewall would appricate it.That wire boo is not very good Thanks

[black07ss]

I'm not sure what you are calling a bulk head but if it is an orange wire located by the a/c and heater relays by the evaporator case. I do not think it is used on a/c cars. I think it was used on non a/c cars only for the blower