Courtesy Lamps Inoperative-All Lamps

Possible Causes:

• Junction Block
• Courtesy Lamps Driver Circuit Open
• Body Control Module

Testing

1. Gain access to the junction block C24 Harness connector. While back probing, measure the voltage of the Courtesy Lamp Driver circuit. Is the voltage above 10.0 volts? If yes, go to next step. If no, replace the Junction Block. Perform BODY VERIFICATION TEST  .
2. Using a jumper wire, test the Courtesy Lamps Driver circuit to the Junction Block C24 connector and ground. Do the courtesy lamps come on? If yes, replace the Body Control Module. Perform BODY VERIFICATION TEST  . If no, repair the Courtesy Lamp Driver circuit for an open condition. Perform BODY VERIFICATION TEST