Got the heater/blower to work. Part of the electrical fried itself and melted the waire in half. I saw that when I bought it but only recently got around to working on it and totally forgot, so I spent an hour fumbling around with a multimeter and reading schematics. The melt was just before plugging into the heater inside the engine bay.
Also figured out I dont have a horn and that the long white wire that goes all the way to the front is likey for the AWOL piece of gear.
Still have a black/white stripe wire from the fuse box hanging by the parking brake. Its about 2.5/3ft long. Any ideas?
Edit: No continuity between this and seatbelt buzzer, thought since that doesnt work (not that i want it to) that might be it.
Also trying to figure out why I have no wait light, but the truck has been starting fine. I usually just turn to "on" and wait about a minute rolling down the window, lighting a smoke and putting in a headphone to queue up some music before starting. Always turns over just fine.
Edit: After some listening the relay comes on and turns off after about 12 seconds in cold weather. I can hear it click. Still starts up fine, still no wait light (Bulb confirmed good)
Cleaned Gen 1 bulb recepticle with pencil eraser, that comes back on now.