Normal Operation - Low Beams

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The smart junction box (SJB) sends reference signals to the headlamp switch through circuits CLF19 (VT/GN) (AUTOLAMPS), CLF23 (WH/VT) (OFF), CLS34 (GY) (PARKING LAMPS) and CLF18 (BU/WH) (HEADLAMPS). At any given time, the headlamp switch routes one of the input circuits to ground through joint connector 6 through circuit GD116 (BK/VT).

When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB provides voltage through circuits CLF04 (BN/BU) and CLF05 (BU/GN) to the LH and RH low beam headlamps, respectively.

On vehicles equipped with autolamps, the SJB also monitors input from the windshield wiper motor through circuit CRW01 (WH) for the headlamps on with wipers on feature.