Main Power Supply and Ground Circuit Check

POWER SUPPLY CIRCUIT CHECK FOR AUTO A/C SYSTEM
Check power supply circuit for auto air conditioning system.
Refer to "POWER SUPPLY ROUTING" and Wiring Diagram.

AUTO AMP. (LCU) CHECK




Check power supply circuit for auto amp. (LCU) with ignition switch ON.
1. Disconnect auto amp. (LCU) harness connector.
2. Connect voltmeter from harness side.




3. Measure voltage across terminal (26), (27), (33) and body ground.

Check body ground circuit for push control unit.
1. Disconnect push control unit harness connector.




2. Connect ohmmeter from harness side.




3. Check for continuity between terminal (32) and body ground.