Ac compressor won’t engage when I bridge pressure switch plug wires?

I have a 99 Sierra 1500 and put almost new everything. New compressor new accumulator new condenser new lines. But the compressor won’t engage when bridging the wire plug that goes into the pressure switch. The compressor does click when I bridge at the fuse box but not at the pressure switch. Any ideas?

1 Answer

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  • Anonymous
    1 month ago

    there are usually TWO of them ...................

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