Vanity Mirror Lamp Malfunction

Vanity Mirror Lamp Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category

Circuit/System Description

The vanity mirror lamps are supplied voltage from the BCM via the inadvertent power courtesy lamp circuit. When the mirror cover is open, the mirror cover switch is closed, providing a ground path for the vanity mirror lamps and illuminating the lamp.

Reference Information
Schematic Reference

Interior Lights Schematics (Interior Lights Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Interior Lighting Systems Description and Operation (Interior Lighting Systems Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)for Scan Tool Information

Circuit/System Verification

Ignition ON, lower the sunshade and open the vanity mirror cover. The vanity mirror lamps should illuminate.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate sunshade.
2. Test for less than 10 ohms of resistance between the ground circuit terminal B and ground.

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

3. Ignition ON, verify a test lamp illuminates between the control circuit terminal A and ground.

• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

4. If all circuits test normal, test or replace the appropriate vanity mirror lamp bulb.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Vanity Mirror Lamp Replacement (Service and Repair)
* Control Module References (Programming and Relearning)for BCM replacement, setup, and programming