Operation CHARM: Car repair manuals for everyone.

XB81 - Check Power to A/C Clutch Circuit For Short to Power



- Key "OFF".

- Disconnect A/C clutch.

- Disconnect Variable Control Relay Module (VCRM). Inspect for damaged or pushed out pins, corrosions, loose wires, etc. Service as necessary.

- Key "ON".

- Measure voltage between the power-to-A/C clutch circuit at the A/C clutch vehicle harness connector and the battery negative post.

- Key "OFF".

- Was the voltage less than 1.0 volt?

Yes -- Go to XB82. XB82 - Check Continuity of A/C Circuits

No -- Service power-to-A/C clutch circuit for short to power. Reconnect all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

A/C "OFF", defroster "OFF". Start engine. wait 15 seconds. Key "OFF". Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)