I never said I knew the answer, but I am confident that lack of refrigerant isn't the problem. I'm hoping that someone has encountered something similar with their a/c that can help. Also, as stated in post #6, I tried the ac switches and got nothing 0v. Could there be something else that would cause the compressor to not have power? If someone wouldn't mind offering their own hi side/low side readings with a similar outside ambient temp of 107°F that would also be great, just to confirm that my readings fall within proper range.

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1990 190E 3.0L