Test C: A/C Compressor Function Test

Test C A/C Compressor Function Control Test:

C1. Measure the voltage at terminal A of the A/C Compressor Control Relay with a fused jumper connected across the terminals of the A/C Low Pressure Switch connector (disconnected).

^ If battery voltage is not present, check the wiring between terminal A of the A/C Compressor Control Relay and terminal A of the Heater and A/C Control Assembly (see schematic).
^ If battery voltage is present, check for normal refrigerant charge. If refrigerant charge is normal, replace A/C Low Pressure Switch. If charge is low, follow procedures for refrigerant diagnostics.