I just bought a 1988 GTA, 5.7L, digital dash.

Power windows, mirrors, power trunk etc.

EVERYTHING worked fine when I got the car. Got it out last night, was driving home with it. About 90km into the trip, the speedo read "0", trip "computer and odo went black. The horn, power mirrors, power locks, dome light are dead. I checked the 20amp courtesy fuse and it was blown, so I replaced (blows as soon as you put it in) So it is a dead short, somewhere.

So what is currently not working :

Speedo (Randomly like once every 3293839 hours will go from 0 to 40 or 53 or something for SPLIT second, then back to 0)
Trip comp. is blank
power locks
power mirrors
dome light/int lights
horn

Any advise? Whats on this circuit?

Thanks in advance!

 

check your lighter seems that they go bad and short out internally.
mine went bad and took out my acc fuse changed lighter and no more probs.

 

+1