so im trying to get the ac up and running and i accidentally cut the original wires going to the compressor... but i think i figured it out. this is for my 95 truck using the compressor from the TBI motor.

i found the lt blue wire coming from the relay that goes to the HPS (located on back of R4 pump correct?) which i cut. i need to hook it to one side of the connector then the other side, dk grn, will jump over the top of pump to green wire for clutch right? then just ground the blk wire... there was a splice on the green that went to the pcm but i guess the new pcm needs data instead of 12v... so i just leave it out i guess. does this sound right so far???

but what the heck is the diode for? i drew a big red arrow if you didnt notice.... i tried searching and it seems like its built into the factory harness... well thats long gone.... so do i need this thing? if so, what are the specs on it cuz ill need to go to radio shack and pick one up and wire it in...

i just cant see what it does and why its there. anybody know what the deal is?