Test B: The Control Illumination Is Always On - All Hardwired Illumination

PINPOINT TEST B: THE CONTROL ILLUMINATION IS ALWAYS ON - ALL HARDWIRED ILLUMINATION

B1-B3:

Normal Operation
The smart junction box (SJB) then supplies a pulse-width modulated (PWM) voltage signal to the dimmable illumination sources on circuit VLN04 (VT/GY) (Navigator) and VLN18 (BU/WH) (Expedition).

DTC B2A32 - is an on-demand DTC that sets when the SJB detects a short to voltage on the LED backlighting output circuit.

DTC B29B7 - is an on-demand DTC that sets when the SJB detects a short to voltage on the white lighting output circuit.

Possible Causes
- Circuit VLN04 (VT/GY) short to voltage
- Circuit VLN18 (BU/WH) short to voltage
- SJB