Vanity Mirror Lamp Inoperative

Vanity Mirror Lamp Inoperative

Diagnostic Instructions

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

Circuit/System Description

The inadvertent power courtesy lamps supply voltage circuit of the body control module (BCM) provides battery positive voltage to each vanity mirror lamp. When the vanity mirror cover on the sunshade is opened, a switch closes to provide a ground circuit and the vanity lamp illuminates.

Reference Information
Schematic Reference

Interior Lights Schematics (Wiring Diagram Index)
Connector End View Reference

Component Connector End Views (Component Connector End Views)
Description and Operation

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

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Control Module References)for Scan Tool Information

Circuit/System Verification

Ignition On, fold down the sun visors and verify the vanity lamps illuminate.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at an affected vanity mirror lamp.
2. Test for less than 1 ohm 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 that a test lamp illuminates between the inadvertent power supply circuit terminal A and ground.

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

4. Connect the harness connector at the vanity mirror lamp, and remove the vanity lamp bulb.
5. Connect a test lamp across the bulb terminals.
6. Ignition ON, open and close the vanity mirror. The test lamp should turn on and off when changing between the commanded states.

• If the test lamp is always on, replace the affected vanity mirror lamp.

• If the test lamp is always off, replace the affected vanity mirror lamp.

7. If all circuits test normal, test or replace the affected vanity lamp bulb.

Repair Instructions

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

* Sunshade Illuminated Mirror Lamp Bulb Replacement (Service and Repair)
* Control Module References (Control Module References)for BCM replacement, programming, and setup.