Test A: Both Low Beams Are Inoperative

PINPOINT TEST A: BOTH LOW BEAMS ARE INOPERATIVE

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 or high intensity discharge (HID) relays (if equipped). The headlamps share a common ground through circuit 1205 (BK).

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- BEC
- SJB

A1:

A2-A3:

A4: