AC Compressor will not kick in

Pin 1 should have battery voltage as well from the pressure switch.
Unplug the amplifier and measure resistance between pins 2 and 10 and compare it with the temperature chart for the thermister.

 

Well, at my wits end with this, I found a new OEM AC Amplifier and Pressure Switch on eBay for a good price. A local Toyota dealer sold me a thermistor for peanuts also and I swapped all three out. I started charging the system and sure enough, the compressor engaged. Unfortunately, I did not have enough refrigerant to finish charging the system, but I will get that done tomorrow and hopefully have my AC back!

 

Hate firing parts at stuff without confirming they are bad but glad you got it fixed

 

I do to, but I was desperate lol. It's been 95-100 here the last couple days and I about had it.

 

By the way, thanks for all your help with this, Dm93! I really appreciate you sharing your knowledge on AC, it is something I feel that so few know or are willing to share on!