Control Module HVAC: Testing and Inspection

Check power supply circuit for auto amp. with ignition switch ON.

1. Disconnect auto amp. harness connector.
2. Connect voltmeter from harness side.
3. Measure voltage across terminal No.1 and body ground.
If NG, check 7.5 A fuse (# 11) at fuse block.









Check body ground circuit for auto amp. with ignition switch OFF.
1. Disconnect auto amp. harness connector.
2. Connect ohmmeter from harness side.
3. Check for continuity between terminal No.3 and body ground.
If NG, repair harness or connector.