My car was the same as yours when I picked it up and had to go to a local bone yard and was able to pull a complete wiring harness for the whole car from a 84 malibu wagon (everything works now) and I only gave $50 for the whole thing since I removed it all (they said they would have but wouldnt make any cash off the deal due to the labor of removing it, plus that way I could lable and have an idea where things go) also look on e-bay and you might be able to score a gm shop manuel on wiring (I got one for all GM's in 1979 and it helped alot! cause the guy had things backwards and crossed like nobodys business) I'm no wiring pro but when you start all over (remove all old) and read and i.d. whats what its pretty easy to fallow