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A/C Condesor fan and Compressor


New member
I have had my 91 M30'S A/C Converted to 134a. The system will not engage with the A/C button in the car, however, when I jump the compressor and or condenser fan it works perfectly. I have replaced all relays and fuses. The fusible links look good.

What should I check next? Inside switch? ground?

Thank you for your suggestions and insight