AC wiring is testing my soul!!

I'm getting aggravated with the AC wiring.. I bought a harness from PSI, everything with it is fine, truck is running great.. I cannot get the AC to function properly.... here is what I have done so far...


Installed the PSI harness and left the entire stock 98 model harness in place. I removed the stock (black) PCM from the truck and mounted the newer 411 PCM in the bracket.. I removed the pins on the AC system on the old harness and re-pinned them into the corresponding pins on the newer PCM but the AC system is not working... I have checked all fuses and nothing is wrong with them... is there something else I should be looking for??

It could be in the programming.I would call PSI they are very helpful when you have questions.

grab a volt meter and start looking