The reading lamps are supplied voltage through the inadvertent power supply circuit from the BCM.

Schematic Reference

Interior Lights Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Interior Lighting Systems Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, turn the reading lamps on and off. The reading lamps should turn on and off.

1. Ignition OFF, disconnect the harness connector at an affected courtesy/reading lamp center.
2. Test for less than 5 ohm 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 C 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 courtesy/reading lamp center, and remove the reading lamp bulb.
5. Connect a test lamp across the bulb terminals.
6. Turn the reading lamp switch on and off. The test lamp should turn on and off when changing between the commanded states.

⇒	If the test lamp is always on, replace the affected courtesy/reading lamp center.

⇒	If the test lamp is always off, replace the affected courtesy/reading lamp center.

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM replacement, setup, and programming