A/C fuse pops as soon as I turn A/C on

As soon as I turn on the A/C using the climate control knob, the 10amp fuse in the under-the-hood fuse box pops. (Even with compressor clutch unplugged) I also tried a 20a fuse as well, it also pops immediately.

Even with the two-pin compressor clutch coil unplugged. Was the first thing I checked.

Swapped horn relay with ac relay to test if it was shorted, and the relay is good. The fuse does not pop with the ac relay removed/missing.

Can anyone share A/C wiring diagram for my vehicle listed above 1500 5.7L V8?
As well as a cooling system diagram?
This van has rear A/C as well. Both blows warm.

And what are some first things I should try? Could the diode or VCM/computer be damaged (but only affecting the A/C) (Read below) and popping the fuse?

Backstory: just bought it from a neighbor. The A/C went out on him like "a year ago" and he paid a shop to replace compressor, drier, and other stuff. He said it worked well and blew cold up until a week or two ago, but then every once in a while, it wouldn't work so he would need to go in and unplug and reinsert the compressor clutch coil wire when it stopped working. And then it would magically start working again.
He suspected the connector was just worn so he bought a replacement and removed the old one and installed a new one. Poorly I might add - the wires are just twisted together and then each is covered by heat shrink tubing that is not even shrunk yet. They easily slide down the wire and expose the splices that are a part.

Those two wires are properly secured now. But if those two wires touched. Would that of have fried something? Or would it have just immediately popped the fuse and that's it?
Could the control module/computer have that circuit fried or something?
And lastly. Could the diode be damaged and immediately popping the fuse?