67Dart273 said

When you say "harness connector" are you referring to the WHITE thing in there? Bypass that whole mess!!!! That is a factory disaster that should have been federally recalled!!!!

There's a few possibilities.........

The compressor clutch magnet may be shorted. Research how much it should draw, "rig" it up with clip leads and MEASURE THE CURRENT with your meter!!!!

It could be the idle is too low RPM, and or that the idle mixture is way wrong and causes the engine to sag, and check timing while doing so as well

It is possible the compressor has an internal problem AKA worn out metal filings dragging, about to seize, or that the system is overcharged

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