Exterior lights

EXTERIOR LIGHTS

OPERATION

Headlamp levelling

To prevent dazzle to oncoming vehicles the headlamps can be adjusted by a switch located on the fascia. When an increased load is placed on the rear of the vehicle raising the front, it is possible to move the headlamps to one of four positions. Battery voltage is supplied from the lighting switch via fuse B3 in the passenger compartment fuse box on an R wire to the headlamp levelling switch and both headlamp levelling motors. Earth paths are on B wires. The headlamp levelling units, fitted to the back of each headlamp, adjust position in response to voltage changes sensed at the levelling switch.

Headlamp levelling switch When the headlamp levelling switch is operated it switches in different value resistors dependent on the position selected. This provides the headlamp levelling motor with one of four different voltages on UG wires. The levelling motor uses internal electronics to compare the voltage from the switch with the battery voltage from fuse B3 on an R wire. Dependent on the difference between the two figures, since both headlamp levelling motors have one terminal permanently connected to earth on B wires, the headlamp moves to a set position.