Here are the wiring diagrams:
First off you need to see if your selector switch is working:
Take your radio bezel off and see if the grey/yellow wire has 12V with the iginition on.
Now select AC with your switch and see if the Purple or Violet wire has 12V if it doesn't try another switch. The violet wire goes to the pcm to tell it to turn on the compressor.
If this checks out you need to use the above diagram to check the other switches and relays.
Obviously if your car is running your PCM relay is working (top left in photo).
Take out the plug to your high pressure switch. if you are getting 12v to the red yellow wire then your problem could be your pressure switch. If not it is either your relay, cycling switch (you just replaced) or something wrong with the pcm.
The diagram should help you out. IF you have any questions post them. i check here and my email notifications often.