Test F: The Autolamps Are Inoperative

PINPOINT TEST F: THE AUTOLAMPS ARE INOPERATIVE

F1-F2:

F2-F4:

Normal Operation
The lighting control module (LCM) sends a voltage reference signal to the light sensor through circuit 218 (WH/VT). When a request for the autolamps is detected by the LCM, the LCM monitors the state of circuit 218 (WH/VT). When a low ambient light condition is present, the signal circuit is high, and the LCM will supply voltage to the exterior lamps. When a high ambient light condition is present, the light sensor pulls the voltage signal low, and the LCM deactivates the voltage to the exterior lamps. The light sensor is provided ground through circuit 676 (PK/OG).

Possible Causes
- Circuit 218 (WH/VT) short to ground
- Light sensor
- LCM