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Easiest way to test is to pull of the relay G17 (this is for a 86 car but it should be the same for yours) test between pin 4 of the relay socket and ground it should be about 3 ohms or so. If it is 0 then the pull in coil on the compressor is shorted, if it shows open then either the low pressure switch is bad or the compressor pull in coil is open, or you have low pressure in the system. If it is open you can test direct from the switch connector to compressor to figure out which is bad.
Sox
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"Little problems always come back and bring bigger friends with them".
1986 951"MADDOG" black
Dual port WG, 4 port control valve with EBC
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