Battery voltage for the courtesy lamps is supplied at all times, from the INT LIGHTS Fuse located in the underhood fuse block, to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it applies voltage through the courtesy lamps supply voltage circuits to the courtesy lamps listed below.

Battery voltage must be between 9-16 volts.

DTC B2615 00 will set for the following conditions:

The BCM will not illuminate any courtesy lamps supplied by the courtesy lamps control circuit.

Schematic Reference

Interior Lights Dimming 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

1. Ignition OFF, disconnect the X4 harness connector at the BCM.
2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.

⇒	If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the X4 harness connector at the BCM.
4. Disconnect the harness connectors at the following components.

•	Left I/P Courtesy Lamp

•	Right I/P Courtesy Lamp

•	Dome Lamp - Coupe

•	Dome/Reading Lamp - Sedan

5. Ignition ON, clear the DTC with a scan tool.
6. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.

⇒	If the DTC resets, test the control circuits for a short to ground. If the circuits test normal, replace the BCM.

7. Reconnect each component one at a time and verify that the DTC does not reset.

⇒	If the DTC resets, test or replace the component responsible for setting the DTC.

8. If all circuits and components test normal, replace the BCM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.