Test B: The High Beams Are Inoperative

PINPOINT TEST B: THE HIGH BEAMS ARE INOPERATIVE

B1-B2:

B2-B4:

Normal Operation
Under normal operation, when the high beams are selected, the multifunction switch provides a ground signal to the smart junction box (SJB) through circuit 1708 (LG/BK). The SJB then sends voltage to the headlamp high beams through circuit 1337 (VT/YE).

Possible Causes
- An open in circuit 1337 (VT/YE) or 1708 (LG/BK)
- Multifunction switch
- Smart junction box (SJB)