Ac switch

2004 Peterbilt 379, Ok so I am a bit confused on this, AC not working in truck, no power to compresoor, if I jump across the high and low pressure switch (which both have been replaced) I get power to the compressor, however I can not turn it off by the AC switch on dash it's just constantly on. I have power to the switch but as soon as I turn the switch on I have no power anywhere, including the power running into it. As far as I can tell no blown fuses just no power running out of the switch. But from my understanding of the wiring diagram I also should not have power running to the high and low pressure switches without power running out of the switch.

 

Everything in the system was replaced 3 years ago, I am working on wiring, system shows it is full on refrigerant. I will check that again, that was my one thought also, but I still think it is going to be something in the wiring, I will check for any fusible links, thank you.

 

Since I have power to the switches and no power running out of the dash switch, I am assuming the relay is bad or something to do with the relay. Will tear into it further after this week, thankfully the temp drops tomorrow and I can do with out for one more week, but today has been a hot sob in here.