Okay, my 87 Firebird has a bum passenger headlight motor. Well, I thought it was the motor. I cannibalized my passenger motor out of my GTA, direct fit, they're both the two-wire kind. The GTA's motors both work perfectly. Stick the 'dead' motor on the GTA, just loose, not plugged onto the light assembly, it spins in both directions fine, I go ahead and finish installing it in the GTA. So, the 87 DIDN'T have a mtor problem, or so I think. The GTA motor gets shoved into the 87, still doens't want to work. I suspect that the module is bad, but I can't find it on the 87 - something about being on the firewall somewhere...

After finishing up all the work, I go to flip the lights for the GTA - the passenger side doesn't work. WTH? It JUST spun around in both directions... Firebird doens't work. Okay, it must be the module in the 87, I hope I didn't goober the motor I yanked out of the GTA...

Now my GTA has a dead passenger motor - I guess that the motor was really bad, and the module was bad too on my 87. On both cars, the driver's side goes up and down normally. I'm going to un-do my motor swaps, just so my GTA has working motors again, and put the new motor I JUST bought into the Firebird. My question is this - How do I go about checking the module, where is it, and does anyone have any pictures of what this thing looks like?

Thanks!

 

The module is on the firewall, next to the windshield washer motor, right behind(but a bit higher than) the brake master cylinder. It's flat-ish and about 3"x3" with two indentical connectors plugged into it, one on each side. It might be hard to see at first because a large conduit of the wiring harness passes between it and the master cylinder.

But since your driver's side still works, the module is probably good, so maybe one connector isn't securely plugged into the module. Try unplugging and replugging them, making sure they're very secure.

I had the same problem, and that's all it was--passenger side wasn't plugged in well.