In doing some snooping around the truck, I've happened upon several wires that appear to be factory wires, and yet they're not hooked up to anything. I don't want to start cutting things out before I know what they are, but I want the engine bay de-cluttered as much as possible.

 

 

first one comes off the battery negative terminal, and goes to the rad support rite? that is a body ground. it needs to be reconnected.
second one is the AC clutch power wires. you can see in the picture where it is unplugged on top of the compressor, rite behind the pulley.
third one i am not sure where it goes.

 

3rd looks like it's in the neighborhood of the vac res? vac warning light circuit?

 

Thanks for the input, guys.

I got the ends replaced on the ground wire and hooked them up, but ran into a problem with the AC clutch wires. The retaining clip on the receptacle on top of the compressor has been broken off, so the plug doesn't snap into place. Is that something that can be replaced without disassembling the pulley and compressor?

 

nope. it should stay in place though.
does it ever got hot enough to use AC up there?

 

Occasionally. I don't have a very high tolerance for heat. A zip tie saved the day

 

that is what i was going to recommend if it did not stay there.

 

Zip ties save the world

 

Last one is the rabs sensor test connector, should have a red/black and green/black wires going to it