For the AC compressor, that is? The power plug that attaches to teh rear of the compressor has been broken off. I cannot find a replacement plug, so I improvised by using the connectors from a junk yard part that works. My AC didn't kick on, so I stuck the V/O meter on the wire (with the car running and the AC "ON", light showing operational), and I got a 3 volt reading. Is that all there is, or is there another problem?