Test C: A/C Compressor Function Control Test

Test C A/C Compressor Function Control Test:

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

^ If battery voltage is not present, go to Step 2.
^ If battery voltage is present, check for normal refrigerant charge. If the refrigerant charge is normal, replace the A/C Low Pressure Cutout Switch.

C2. Measure the voltage at terminal B of the A/C Compressor Control Relay with a fused jumper connected across the terminals of the A/C High Pressure Cut-Off Switch connector (disconnected).

^ If battery voltage is present, replace the A/C High Pressure Cut-Off Switch.
^ If battery voltage is not present, check the wiring between the switches back to the A/C Control Head (see schematic).