B1011-12

B1011-12-LICENSE PLATE LAMP - CIRCUIT SHORT TO BATTERY

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Body Control Module (BCM) receives the input from Left Multi-function Switch requesting park lamp illumination. The BCM provides a voltage output through the license plate lamp control circuit. The control circuit connects to the License Plate Lamps, which are part of the Park Lamp lighting system. A ground path for the lamps is present through the harness to the body sheet metal. For additional information on the Park Lamps operation, Exterior Lamps - Operation.

- When Monitored:
With the park lamps off.

- Set Condition:
When the Body Control Module (BCM) detects a high condition on the (L3) License Plate Lamp Driver circuit.





1. CHECK FOR AN INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all DTCs.
3. Turn the Park Lamps on and off.
4. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE (L3) LICENSE PLATE LAMP DRIVER CIRCUIT FOR A SHORT TO VOLTAGE IN THE HARNESS
1. Turn the ignition off.
2. Disconnect the Exterior Handle License Bar Lamp harness connector.
3. Disconnect the BCM C2 harness connector.
4. Turn the ignition on.
5. Measure the voltage between ground and the (L3) License Plate Lamp Driver circuit.

Is there any voltage present?

Yes

- Repair the short to voltage in the (L3) License Plate Lamp Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE BCM FOR CORRECT OPERATION
1. Turn the ignition off.
2. Reconnect the BCM C2 harness connector.
3. Connect a 12-volt test light between the (L3) License Plate Lamp Driver circuit and the (Z941) Ground circuit at the Exterior Handle License Bar Lamp harness connector.
4. Turn the ignition on.
5. Turn the Park Lamps on.

Does the test light illuminate brightly?

Yes

- Replace the License Plate Lamp. License Plate Lamp - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the BCM. Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.