For future information, The a/c system I installed was out of a 86 2wd and I installed it into a 84 4wd w/ towing package. The main plug is different.The main plug is located just below the windshield on top of the evaporator, 4" out of the main harness.

The 86 2wd has a 4 wire plug, coil, compressor wire, and two wires for the VSV.

The 84 4wd towing package has a six wire plug, coil, compressor, two for VSV, thermal switch, and warm up relay wire.

I had to run a couple of wires to hookup the coil, compressor, and two VSV for the four wire plug into the six wire plug. <img src="/forums/images/graemlins/lol.gif" alt="" />


1984 X-cab 4x4, chevy one wire alternator, 22r, looking for mods