I am having issues with the A/c system in my new to me 91 Previa. The A/C button when depressed, lights up, but the engine does not idle up and from what I can tell, the compressor clutch does not engage. There is no cold air. Blower fan works great. There is power at the A/C fuse. There is no power at the A/C idle up VSV. I am wanting to test the AC cut relay, and the magnetic cluitch switch relay, as well as the A/C amplifier, but I cannot locate the A/C cut relay, the magnetic switch relay, or the A/C amplifier. Anyone know where these are located?

I also read another thread while searching with the same issue, and it turned out to be the pressure switch. Would it be ok to jump the pressure switch connector terminal and bypass the pressure switch, or is that inviting more problems?