Control Module HVAC: Testing and Inspection

Auto Amplifier Check:

POWER SUPPLY CHECK
- Disconnect auto amp connector.
- Turn ignition switch ON.
- Measure voltage across terminals 1, 2, and 3. Should equal 12 volts.

Auto Amplifier Check:

GROUND CHECK
- Disconnect auto amp connector.
- Turn ignition switch OFF.
- Probe from terminal 8 to ground. Should have continuity.