12V source for dash AC compressor?
I am not ac tech, but have fixed one or two. No manual, no wire diagram to follow here. I have a 1994 Vectra 34RA, P30 Chevy workhorse, with a SCS Fridgette dash AC system uses Sanden 7803 compressor. The SCS fridgette material I have from factory is merely a list of repair shops. No system or wire diagrams.
Did vacuum leak check test, r134a fill to specified oz. However, AC compressor clutch not engaging. I checked Ohms resistance on compressor coil, 3.0 which should be a good coil. I am not sure where coil gets its 12v source to engage coil? I do not see on fuse panel or any circuit breaker for dash ac. I assume a relay? I have several relays none marked as dash ac. Thanks for any pointing in correct direction.
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