Test F: The Headlamps Are On Continuously

PINPOINT TEST F: THE HEADLAMPS ARE ON CONTINUOUSLY

F1:

F2-F4:

F5-F7:

Normal Operation
Under normal operation, when the headlamps are turned OFF, the headlamp switch sends a ground signal to the smart junction box (SJB) through circuit 1400 (TN/WH).

When the headlamps are turned ON, the headlamp switch sends a ground signal to the SJB through circuit 1402 (RD/WH). The SJB then sends voltage to the headlamp low beams through (LH) circuit 1338 (WH) and (RH) circuit 1336 (LG/WH).

When the high beams are selected, the multifunction switch provides a ground signal to the SJB through circuit 1394 (WH/RD). The SJB then provides ground to the headlamp high beam relay through circuit 1708 (LG/BK). The bussed electrical center (BEC) provides voltage to the relay coil and switch. When the relay is energized, voltage is provided to the headlamp high beams through circuits (RH) 1335 (YE/WH) and (LH) 1337 (VT/YE).

When the flash-to-pass feature is activated, the multifunction switch provides a ground signal to the SJB through circuit 1395 (RD/PK). The SJB then provides ground to the headlamp high beam relay through circuit 1708 (LG/BK). The BEC provides voltage to the relay coil and switch. When the relay is energized, voltage is provided to the headlamp high beams through circuits (RH) 1335 (YE/WH) and (LH) 1337 (VT/YE).

Possible Causes
- An open in circuit 1400 (TN/WH)
- A short to voltage in circuit 1338 (WH), 1337 (VT/YE) or 1336 (LG/WH)
- A short to ground in circuit 1402 (RD/WH), 1395 (RD/PK) or 1394 (WH/RD)
- Headlamp switch
- Multifunction switch
- Bussed Electrical Center (BEC)
- Smart junction box (SJB)