Well I bought my car without AC, I have now installed AC on it, it's all plugged in, but I can not get the AC panel to turn on the compressor, switch won't light up when button is pressed. I've searched and searched and tried alot of things

Swapped AC relay on rad support for a good one, checked fuse, tried another actual switch on ac panel, car is running power FC, tried putting stock computer in to see if that fixed it, so far have had nothing, fuse under the hood is getting power. Any other ideas?

 

Might be obvious but does the system have a charge? Try jumping the compressor to see if it kicks on.

 

Yes I just installed all the AC components and jumped compressor to charge the system

 

I've also jumped pressure switch to make sure it wasn't a bad switch

 

Well I swapped out everything under the dash from mana to Denso and apparently forgot to plug in the thermo switch, which was why the panel wasn't lighting up, now panel lights up but still not switching compressor on

 

The PFC has an AC problem since 1999. It will not run the AC on some cars and some others it depends on which fan speed is being used.

Go to the PFC Forum and look it up. The best fix is installing a small relay. The PFC problem is that it does not apply a true full ground to the circuit to turn on the AC.