Re: headlights shutting off
 

Yeah, those "parts" stores dont carry much in the way of factory harnesses. The yard is your best bet OR

What I was forced to do on a failed harness: get a bunch of those blade fittings and hack the harness of altogether. Attach the blade recievers to the individual wires and slide them over the blades on the back of the switch. You will need to wrap the recievers in e-tape so they dont touch eachother and you will need to solidly tape the wires together and tape/ziptie them to a surface near the switch since these little wire connectors dont have resitance to pulling. All that said, it's a quick convenient solution and it does last.

Good luck

Re: headlights shutting off
 

does anyone have a spare harness from a parts car or something? i have posted this WANTED item in the classifieds here with no luck. anyone got one? reply or PM me, thanks

Re: headlights shutting off
 

I might be able to hook you up. Let me make a phone call tomorrow, and I'll PM ya with the goods. :D

Re: headlights shutting off
 

You also might want to hook up a relay between your switch and headlights using your battery as the power wire to the relay. The reason the switch overheats is because that switch was poorly designed and the load is too great for the wiring. By using the relay, it takes the load off of the switch. It is a very common problem with '87-'93 Stangs. I had the same problem and after installing the relay, I never had the problem again after 7 years with it installed.
Just a thought for ya.
I'll look around and try to find the wiring diagram if you're interested! :)

Glad you got it working, though! :)