At the relay there must be 2 terminals with battery voltage with ignition switch turned on.
Toggling the switch makes the compressor works could be due to a faulty switch which has 2 circuit, 1 for the indictor light and the other for the compressor to know the switch is turned on.
You would need a test light or DVOM to test.
Friday, August 3rd, 2012 AT 6:29 PM