Hello:

I'm swapping a 350 in my 1986 Iroc. Had a MAF 305 now I'm doing the MAP swap also. I'll be ordering a new computer harness for the swap since the old is too hacked up.

There's the square connector besides the brake booster that I have a diagram for, so no problem there.

My question is about the remaining harnesses:

There's a harness coming from a circle hole right besides the steering column. It has a hose, a square connector with plugs of different shapes, a flat, gray female connector with 5 terminals, and a weatherpack male connector with two terminals.

Can anybody tell me what are these for?

There's another harness right behind the engine, which I'm pretty sure is for HVAC. I did a search for a wiring diagram for this but only found one hosted on tripod and wouldn't work. Anybody have a diagram so I can figure out which connector goes where? BTW, previous owner had removed the A/C. I'm putting it back now.

I'll try to post more pics tomorrow so it's easier.

Any help greatly appreciated.

 

The gray one is for the cruise control servo as is the vacuum hose. The hose runs to a switch on your brake pedal that kicks out cruise when you hit your brakes. The square one looks like it should hold a relay. Sorry I can't help more.