Test D: The Control Illumination Is Always On

PINPOINT TEST D: THE CONTROL ILLUMINATION IS ALWAYS ON

D1:

D2-D3:

Normal Operation
With the parking lamps or headlamps on, the smart junction box (SJB) supplies a pulse width modulated (PWM) voltage signal to the dimmable illumination sources on circuit VLN04 (VT/GY).

Possible Causes
- Circuit VLN04 (VT/GY) short to voltage
- SJB