Test T: The Exterior Lamps Are Inoperative

PINPOINT TEST T: THE EXTERIOR LAMPS ARE INOPERATIVE

T1-T3:

T4:

Normal Operation
The instrument cluster monitors the headlamp switch position by sending out voltage reference signals to the headlamp switch. If a problem is detected with the circuits to the headlamp switch, the instrument cluster will default the headlamps and parking lamps on. When the headlamp switch is in the parking lamps ON position, the instrument cluster sends a signal to the front electronic module (FEM) and the rear electronic module (REM) to illuminate the parking lamps.

Possible Causes
- Circuit 8-LF14 (WH/BU) open
- Headlamp switch
- Instrument cluster