Test A: Both Headlamps Are Inoperative

PINPOINT TEST A: BOTH HEADLAMPS ARE INOPERATIVE

A1-A3:

A4-A5:

Normal Operation
The smart junction box (SJB) receives voltage from the battery junction box (BJB) through circuits 1682 (RD/LB), 1695 (YE/WH) and 54 (LG/YE). The SJB sends a reference signal to the multifunction switch through circuit 1033 (RD/YE). When the multifunction switch is switched to the headlamps ON position, the voltage signal is routed to ground through circuit 570 (BK/WH). When the SJB detects the multifunction switch is in the headlamps ON position, the SJB sends voltage to the headlamps.

Possible Causes
- circuit 54 (LG/YE) open
- circuit 570 (BK/WH) open
- circuit 1033 (RD/YE) open
- circuit 1682 (RD/LB) open
- circuit 1695 (YE/WH) open
- multifunction switch
- SJB