The headlamp levelling feature is controlled via the four position rotary switch located on the fascia centre module. Headlamp levelling should be used under the following circumstances: 0 – Driver, or driver and front seat passenger only (no luggage) 1 – Driver and three passengers (no luggage) 2 – Driver, three passengers and full luggage compartment 3 – Driver only, full luggage compartment.
Operation
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 6 of the under seat fuse box (C0632) on an N wire. Fusible link 6 (C0571) is connected to the lighting switch (C1082 on LHD, C0041 on RHD) by an NU wire.
Headlamp Levelling Switch
When the lighting switch is turned to the side or headlamp position, current flows across the switch (C1082 on LHD, C0041 on RHD) to fuse 20 of the passenger compartment fuse box (C0581) on an R wire. Fuse 20 (C0581) provides a feed to the headlamp levelling switch (C0093) on an RO wire. The switch (C0093) is earthed on a B wire.
The headlamp levelling switch has four pre-set positions. At each of the four switch positions, the contacts in the switch connect to a different resistance value to provide one of four different output voltages.
RH Headlamp Levelling Motor
Fuse 20 of the passenger compartment fuse box (C0581) provides a feed to the RH motor (C0070) on an RO wire. The headlamp levelling switch (C0093) provides a feed to the RH motor (C0070) on a UY wire. By comparing the voltage supplied by fuse 20 with the voltage supplied by the switch, the motor moves the headlamp to the required position. The motor (C0070) is earthed on a B wire.
LH Headlamp Levelling Motor
Fuse 20 of the passenger compartment fuse box (C0581) provides a feed to the LH motor (C0071) on an RO wire. The headlamp levelling switch (C0093) provides a feed to the LH motor (C0070) on a UY wire. By comparing the voltage supplied by fuse 20 with the voltage supplied by the switch, the motor moves the headlamp to the required position. The motor (C0071) is earthed on a B wire.