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DTC B3883

DTC B3883

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions has overviews of all diagnostic categories.


DTC Descriptors

DTC B3883 02

License Plate Lamp Circuit Short to Ground

DTC B3883 04

License Plate Lamp Circuit Open

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
License Plate Lamp Control

B3883 02

B3883 04

1

-

1. License plate lamps always ON



Circuit/System Description

The headlamp switch is supplied with ground at all times. When the headlamp switch is placed in either the park or low beam position, ground is applied to the license plate lamp signal circuit to the body control module (BCM). The BCM responds by applying battery voltage to the license plate lamp control circuit. This energizes the left and right license lamp.

Conditions for Running the DTC

Headlamp switch in park or low beam position.

Conditions for Setting the DTC

B3883 02

The BCM detects a short to ground on the control circuit.

B3883 04

The BCM detects an open control circuit.

Action Taken When the DTC Sets

The appropriate license plate lamp is inoperative.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information

Schematic Reference

Exterior Lights Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for information on diagnostic tools

Circuit/System Verification

Ignition ON, perform the License Plate Lamps test. The license plate lamps should be ON/OFF.

Circuit/System Testing


1. Ignition OFF, remove the appropriate E7 License Plate Lamp bulb and inspect.

2. If bulb is faulty, replace bulb.

3. Disconnect the harness connector at E7 License Plate Lamp.

4. Test for less than 5 Ω between the license plate lamp ground circuit harness connector terminal 1 and ground.

5. If greater than the specified range, test the ground circuit for an open/high resistance.

6. Connect a test lamp between the control circuit harness connector terminal 3 and ground.

7. Command the License Plate Lamps test with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

8. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

9. If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Rear License Plate Lamp Replacement

• Control Module References for information on BCM replacement, setup, and programming