Compressor Controls

COMPRESSOR CONTROLS
The Compressor for the Air Conditioning System is driven by the engine by means of a belt drive and the A/C Compressor Clutch. The Clutch allows the Compressor to be disengaged when Air Conditioning is not required. Power to the A/C Compressor Clutch is supplied by the HTR A/C Fuse.

The A/C Compressor Clutch Diode is connected across the terminals of the A/C Compressor Clutch. Whenever the clutch is de-energized, the magnetic field around it collapses. generating an induced voltage in the clutch coil. The Diode provides a path for the current resulting from the induced voltage so other circuit components are not damaged.

With the A/C-Heater Selector Switch in any mode except HEAT or VENT voltage flows from the A/C-Heater Selector Switch through the LT GRN (66) wire to the Evaporator Pressure Switch. Battery voltage is passed through the Evaporator Pressure Switch to the A/C Compressor Clutch through the DK GRN (59) wire. The A/C Compressor Clutch is grounded through the BLK (150) wire and ground G150.