A/C Switch and Compressor Clutch Relay
OPERATIONThe air conditioning switch applies the battery voltage to the engine control module when the air conditioning is turned on.
When the air conditioning ON signal is input, the engine control module drives the idle air control motor and turns ON the power transistor. As a result, the air conditioning compressor clutch relay coil is energized to turn ON the relay switch, which activates the air compressor magnet clutch.