71 Cheyenne AC Help

[hammered68]

I have been in the process of bringing my heater and a/c to life on my 71 Cheyenne. A few months back, after replacing the high speed relay, switch ect., I was able to get it to work on only low and medium speeds. I traced down my lack of high speed issue to the anti diesel relay. I was unable to find a new relay at the local parts stores, however I located another relay lying around the shop and tried it out. Everything worked as it should until three weeks ago. While out on an afternoon trip this relay apparently burned out. Not only did I loose high speed on my a/c, but the compressor would not engage. I am able to place a jumper wire in the actual harness that the anti-diesel relay plugs into, and it will allow the blower to blow on high speed, and will also allow the compressor to engage however, the compressor will stay engaged unless this jumper is unplugged. I've sense bought a new anti diesel relay off of ebay, which came in today. It's NOS, but did not fix the issue. I've been hoping to keep everything as original as possible but I'm at my wits end on this a/c issue. I have researched the anti diesel relay and learned the original part number from GM was 3996203, which is the first relay I took out. I also learned that GM replaced it with part 6273301, which is what I found on ebay. Long story short, does anyone have any ideas? I truly dont want to have a jumper wire hanging there on an original un-butchered bb truck.