Thermo Control Amp. Check

Check power supply circuit for thermo control amp. with ignition switch ON and air conditioner switch ON.

1. Disconnect thermo control amp. harness connector.
2. Connect voltmeter from harness side.
3. Measure voltage across terminal No. (1) and body ground.








Check body ground circuit for thermo control amp. with ignition switch ON and fan switch ON.

1. Disconnect thermo control amp. harness connector.
2. Connect ohmmeter from harness side.
3. Check for continuity between terminal No. (2) and body ground.