If the system is wired properly and has insufficient pressure (i.e., low or no freon) no voltage will be sent to the compressor. You can not test the compressor wire with an empty system.
Quote:
Originally Posted by tim71
I'm confused on the AC response. I thought our ac systems are a non cycling system, the compressor is either on or off. The POA valve adjusts the flow of refrigerant so the evaporator doesn't freeze up. I haven't plumbed the under hood part of the ac system yet, I was just trying to detect current at the compressor switch if the dash controls are set for the ac system to be on.
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