Test A: The Low Beams Are Inoperative

PINPOINT TEST A: THE LOW BEAMS ARE INOPERATIVE

A1-A2:

A2-A3:

A4:

Normal Operation
The smart junction box (SJB) is supplied voltage for the low beams through circuit 1052 (TN/BK) from the bussed electrical center (BEC). When a request for the low beams is detected, the SJB provides voltage to the low beams. The headlamps share a common ground through circuit 1205 (BK).

Possible Causes
- Fuse
- Circuit 1052 (TN/BK) open
- Circuit 1205 (BK) open
- BEC
- SJB