Test C: The High Beams Are Inoperative

PINPOINT TEST C: THE HIGH BEAMS ARE INOPERATIVE

C1-C3:

C4:

Normal Operation
The smart junction box (SJB) receives voltage from the battery junction box (BJB) through circuit 54 (LG/YE). The SJB sends a reference signal to the multifunction switch through circuit 12 (LG/BK). When the multifunction switch is placed in the HIGH BEAM position, the voltage signal is routed to ground through circuit 570 (BK/WH). When the SJB detects the multifunction switch in the HEADLAMPS ON and HIGH BEAM position, the SJB sends voltage to the high beam headlamps.

Possible Causes
- Fuse
- Circuit 12 (LG/BK) open
- Circuit 54 (LG/YE) open
- Multifunction switch
- SJB