The rear fog lamps only operate when the headlamps are switched on, and the ignition switch is in position II. The non-latching fog lamp switch is mounted in the fascia console, and contains a tell-tale LED. The fog lamps are automatically switched off every time the ignition is turned off.
Operation
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 5 and fusible link 6 of the under seat fuse box (C0632) on an N wire. Fusible link 6 (C0571) provides a constant battery feed to the lighting switch (C1082 on LHD, C0041 on RHD) on an NU wire.
Fusible link 5 (C0570) is connected to the ignition switch (C1043 on RHD, C0028 on LHD) by an NW wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C1732 on LHD, C0094 on RHD) to fuse 15 of the passenger compartment fuse box (C0580) on a W wire. Fuse 15 (C0580) provides an ignition feed to the headlamp relay coil (C0282) on a WG wire. The relay coil (C0282) is earthed on a B wire.
Fog Lamps
When the lighting switch is moved to the headlamp position, current flows across the switch (C1082 on LHD, C0041 on RHD) to the headlamp relay (C0282) on a BU wire. Current flows across the closed relay switch contacts (C0282) to fuse 26 of the passenger compartment fuse box (C0581) on a U wire. Fuse 26 (C0581) provides a feed to the fog lamp ECU (C1724 on LHD, C0543 on RHD) on a UP wire. The fog lamp ECU (C1724 on LHD, C0543 on RHD) is earthed on a B wire.
When the fog lamp ECU (C1724 on LHD, C0543 on RHD) receives a feed from fuse 26, it provides a feed to the fog lamp switch (C0064 on LHD, C1741 on RHD) on a BS wire. When the fog lamp is pressed, the switch contacts close, and a momentary earth path is created on a B wire. Sensing this earth, the fog lamp ECU (C1724 on LHD, C0543 on RHD) provides a feed to the following on RY wires:
- The tell-tale LED (C0064) located in the fog lamp switch
- The warning lamp (C0233) located in the instrument pack
- The rear fog lamp (C0512 on LHD, C2119 on RHD) – 90 and 110 vehicles only
- The rear fog lamp (C0515 on LHD, C2120 on RHD) – 130 vehicles only
- The trailer socket (C0499).
All except the trailer socket are earthed on B wires.