Originally Posted by zip439

Inside the black plastic box that holds the RCM, PCM and BCM there is an electrical connector mounted on the front of the big box. That connector is for the AC compressor. You can bypass the control module input/safety limits and test the compressor clutch by directly applying 12v jumped from the battery directly to the compressor at that connector. If the clutch engages you know it is a safety switch/low pressure problem or control module problem. If the clutch does not engage then it is the clutch compressor problem. I've forgotten what color the wire is, but you can see it in the wiring diagrams in the service manual.