I'm losing my mind over one single wire that I can't seem to figure out what its for. 1990 Camaro, this wire is in the same location in my TBI harness and TPI harness. Its a single dark green wire with a flat connector, comes out on the drivers side of the engine. The closest wire that comes out of the loom by it is the purple oxygen sensor wire. I had labeled it as "knock sensor" but thats wrong, I'm guessing it was some sensor screwed into the block though. I can't find anything for a dark green wire in the service manual.

Any ideas?

 

Temp gauge sending unit; driver's side head, between #1 & #3 plugs

 

... Guess I can stop thinking my gauge cluster is broke because the temp gauge doesn't move

Thanks!

 

Exactly... see my signature.

 

That was easier than a Dallas cheerleader on a Friday night after a 12pack of beer!

 

also known as the wire that's missing from my harness