Panel Lamp Driver Failure

When Monitored: Ignition in RUN and IOD fuse/connector installed.

Set Condition: This condition is set if the panel lamp driver that illuminates the instrument panel shuts down from an over temp condition for at least 5 seconds.

Possible Causes are:

• DRIVER HEATED SEAT SWITCH SHORTED TO GROUND
• PASSENGER HEATED SEAT SWITCH SHORTED TO GROUND
• HVAC CONTROL PANEL SHORTED TO GROUND
• PRNDL ILLUMINATION SHORTED TO GROUND
• ASH RECEIVER BULB OR SOCKET SHORTED TO GROUND
• RADIO SHORTED TO GROUND
• PANEL LAMPS DRIVER CIRCUIT SHORTED TO GROUND (HVAC)
• PANEL LAMPS DRIVER CIRCUIT SHORTED TO GROUND (PRNDL)
• PANEL LAMPS DRIVER CIRCUIT SHORTED TO GROUND (RADIO)
• PANEL LAMPS DRIVER CIRCUIT SHORTED TO GROUND (ASH RECEIVER)
• PANEL LAMPS DRIVER CIRCUIT SHORTED TO GROUND (HEATED SEATS)
• BCM - PANEL LAMP DRIVER FAILURE

1. Turn ignition off. Disconnect the Drivers Heated Seat Switch. Turn ignition on. Erase Body Diagnostic Trouble Codes. Wait 5 seconds then read BCM DTC's. Is the PANEL LAMPS DRIVER DTC present? If yes, go to next step. If no, replace the drivers heated seat switch. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
2. Turn ignition off. Disconnect the Passengers Heated Seat Switch. Turn ignition on. Erase Body Diagnostic Trouble Codes. Wait 5 seconds then read BCM DTC's. Is the PANEL LAMPS DRIVER DTC present? If yes, go to next step. If no, replace the passenger heated seat switch. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
3. Turn ignition off. Disconnect the appropriate HVAC Control panel connector C1 for manual or C2 for automatic system. Turn ignition on. Erase Body Diagnostic Trouble Codes. Wait 5 seconds then read BCM DTC's. Is the PANEL LAMPS DRIVER DTC present? If yes, go to next step. If no, replace the HVAC control panel assembly. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
4. Turn ignition off. Disconnect the PRNDL/Transfer Case Illumination connector. Turn ignition on. Erase Body Diagnostic Trouble Codes. Wait 5 seconds then read BCM DTC's. Is the "Panel Lamps Driver" DTC present? If yes, go to next step. If no, repair or replace the shorted PRNDL/Transfer Case Illumination. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
5. Turn ignition off. Disconnect the ash receiver. Turn ignition on. Erase Body Diagnostic Trouble Codes. Wait 5 seconds then read BCM DTC's. Is the "Panel Lamps Driver" DTC present? If yes, go to next step. If no, repair the ash receiver bulb or socket for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
6. Turn ignition off. Disconnect the radio C1 connector. Turn ignition on. Erase Body Diagnostic Trouble Codes. Wait 5 seconds then read BCM DTC's. Is the "Panel Lamps Driver" DTC present? If yes, go to next step. If no, repair or replace the Radio. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.
7. Turn ignition off. Disconnect the appropriate HVAC Control panel connector C1 for manual or C2 for automatic system. Disconnect the BCM C1 connector. Measure the resistance of the Panel Lamps Driver circuit in the BCM C1 connector (cavity No. 10). Is the resistance less than 5 ohms? If yes, repair the Panel Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
8. Turn ignition off. Disconnect the PRNDL/Transfer Case Illumination connector. Disconnect the BCM C1 connector. Measure the resistance of the Panel Lamps Driver circuit in the BCM C1 connector (cavity No. 9). Is the resistance less than 5 ohms? If yes, repair the Panel Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
9. Turn ignition off. Disconnect the radio C1 connector. Disconnect the BCM C1 connector. Measure the resistance of the Panel Lamps Driver circuit in the BCM C1 connector (cavity No. 13). Is the resistance less than 5 ohms? If yes, repair the Panel Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
10. Turn ignition off. Disconnect the ash receiver lamp. Disconnect the BCM C1 connector. Measure the resistance of the Panel Lamps Driver circuit in the BCM C1 connector (cavity No. 8). Is the resistance less than 5 ohms? If yes, repair the Panel Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
11. Turn ignition off. Disconnect the driver and passenger heated seat switches. Disconnect the BCM C1 connector. Measure the resistance of the Panel Lamps Driver circuit in the BCM C1 connector (cavity No. 12). Is the resistance less than 5 ohms? If yes, repair the Panel Lamp Driver circuit for a short to ground. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS. If no, go to next step.
12. If there are no possible causes remaining, replace the Body Control Module. Perform BODY VERIFICATION TEST VER 1  under VERIFICATION TESTS.