Quote:
Originally Posted by Knufire
It powers the compressor directly AFAIK.
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Yep, the compressor +12v and ground wires plug straight into the PCM. There's some very intelligent circuitry in the PCM to make sure the large start current required by the compressor or any potential shorts in the system doesn't blow the fuse on the PDB's control system supplies. (The solenoid outputs have the same protection.)