M1010 ac wiring

I was looking at my m1010 which doesn't have the ac working at the moment, I see a relay going to a breaker, going to the high pressure switch on the dryer, which then goes to the compressor, and grounds out the other side of the compressor. I have a red dot evaporator unit bolted to the back of the cab and it looks like the compressor gets its power from the switch on the unit. There should be a low pressure switch somewhere right? I'm not seeing it

I have an M1010 box if I can assist in any way. Complete with the wiring harness and A/C unit still attached. Let me know what it is you need.

I don't know anything about the 1010 wiring, but I think you'll find what you need in the TMs. Free for the downloading.