Operation

OPERATION

General

Feed from the positive battery terminal (C0192) is supplied to fusible link 3, fusible link 9, and fusible link 12 of the engine compartment fuse box (C0192) on an R wire. Fusible link 9 (C0570) provides a constant battery feed to fuse 22 of the passenger compartment fuse box (C0587) on an N wire. Fuse 22 is connected to the rear fog lamp relay, which is also located in the passenger compartment fuse box.

Fusible link 3 (C0571) is connected to the ignition switch (C0028) by an N wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C0028) to the rear fog lamp relay and fuse 8 of the passenger compartment fuse box (C0588) on a G wire. Fuse 8 provides an ignition feed to the Central Control Unit (CCU) (C0593), which is mounted directly onto the rear of the passenger compartment fuse box.

The earth path for the fog lamp relay coil is controlled by the CCU (C0593). The CCU (C0592) monitors the condition of the rear fog lamp switch (C0064) by providing a feed via the passenger compartment fuse box (C0589) on a RY wire. When the switch is pressed, a momentary earth path is created on a B wire.

The CCU also monitors the condition of the lighting switch. Fusible link 12 (C0570) provides a constant battery feed to the lighting switch (C0041) on a UN wire. When the lighting switch is turned to the side or headlamp position, current flows across the switch (C0041) to the CCU (C0428) on an OU wire. The CCU will now energise the rear fog lamp relay.

The energised rear fog lamp relay (C0583) provides a feed to both the LH fog lamp (C0490 on NAS vehicles, C0515 on all other vehicles), and the RH fog lamp (C0489 on NAS vehicles, C0512 on all other vehicles) on RY wires. The relay also provides a feed to the trailer pick-up (C0499) on a RY then U wire. The fog lamps are earthed on B wires.

The energised rear fog lamp relay (C0589) also provides a feed to the instrument pack warning lamp (C0230) on a UY wire. The warning lamp (C0233) is earthed on a B wire.