The head, side and tail lamps are operated via the lighting switch located on the steering column. The lighting switch has two positions. Position I switches on the tail lamps, the number plate lamps, and the front side lamps. Position II additionally switches on the front headlamps. When the headlamps are on, the column switch can be used to switch between main and dipped beam. The headlamps can be flashed with the lighting switch in any position, by pulling the column switch towards the driver.
Operation
Td5
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 1, fusible link 5, and fusible link 6 of the under seat fuse box (C0632) on an R wire. Fusible link 1 is connected in series with fuse 3, which is also located in the under seat fuse box. Fuse 3 (C0572) provides a constant battery feed to the column switch (C1739 on LHD, C1042 on RHD) on an NP wire.
Fusible link 6 (C0571) provides a constant battery feed to the lighting switch (C1082 on LHD, C0041 on RHD) on an NU wire, and the dim dip resistor (C0014) on an NU then NW wire.
Fusible link 5 (C0570) is connected to the ignition switch (C1043 on LHD, C0028 on RHD) 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 (C0282) and the dim dip relay (C0048) on WG wires.
Side Lamps
When the lighting switch is moved to the side lamp position, current flows across the switch (C1082 on LHD, C0041 on RHD) to fuse 18 fuse 19 and fuse 20 of the passenger compartment fuse box (C0581) on an R wire. Fuse 18 (C0581) provides a feed to the following on RO wires:
- The RH front side lamp (C0537)
- The RH tail lamp (C0125 on 90 & 110 vehicles, C0489 on 130 vehicles)
- The trailer socket (C0499)
All are earthed on B wires.
Fuse 19 (C0581) provides a feed to the following on RB wires:
- The LH front side lamp (C0538)
- The LH tail lamp (C0121 on 90 & 110 vehicles, C0490 on 130 vehicles)
- The number plate lamp (C0138 on 90 & 110 vehicles, C0140 on 130 vehicles)
- The trailer socket (C0499)
- The side lamp warning lamp (C0233) located in the instrument pack.
All are earthed on B wires.
Fuse 20 (C0581) provides a feed to the dim dip relay (C0048) on an RO wire.
Headlamp Dim Dip
The dim dip relay (C0048) is provided an ignition feed from fuse 15 of the passenger compartment fuse box (C0580) on a WG wire. With the lighting switch in the side lamp position, the dim dip relay (C0048) is earthed on a B wire.
Fusible link 6 of the under seat fuse box (C0571) provides a constant battery feed to the dim dip resistor (C0014) on an NU then NW wire. The dim dip resistor (C0014) provides a reduced feed to the dim dip relay (C0048) on an NG wire. The energised dim dip relay (C0048) provides a feed to fuse 22 and 23 of the passenger compartment fuse box on a UR wire.
Fuse 22 (C0581) provides a reduced feed to the RH headlamp dipped beam bulb (C0011) on a UB wire. Fuse 23 (C0581) provides a reduced feed to the LH headlamp dipped beam bulb (C0009 on a UK wire. Both bulbs are earthed on B wires.
Headlamps
The headlamp relay coil (C0282) is provided an ignition feed from fuse 15 of the passenger compartment fuse box (C0580) on a WG wire. The relay coil (C0282) is earthed on a B wire. 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 switch (C0282) on a U wire. The energised headlamp relay (C0282) provides a feed to the column switch (C1739 on LHD, C1042 on RHD) and the dim dip relay (C0048) on U wires.
NOTE: The feed on the U wire de-energises the dim dip relay.
With the column switch in the dipped beam position, current flows across the switch (C1739 on LHD, C1042 on RHD) to the dim dip relay (C0048) on a UR wire. Current flows across the dim dip relay switch contacts to fuse 22 and fuse 23 of the passenger compartment fuse box (C0581) on a UR wire.
Fuse 22 (C0581) provides a feed to the RH headlamp dipped beam bulb (C0011) on a UB wires. Fuse 23 (C0581) provides a feed to the LH headlamp dipped beam bulb (C0009) on a UK wire. Both bulbs are earthed on B wires.
With the column switch in the main beam position, current flows across the switch (C1739 on LHD, C1042 on RHD) to fuse 24 and fuse 25 of the passenger compartment fuse box (C0581) on a UW wire. Fuse 24 (C0581) provides a feed to the RH headlamp main beam bulb (C0011) on a UO wire. Fuse 25 (C0581) provides a feed to LH headlamp main beam bulb (C0009) on a US wire. Both bulbs are earthed on B wires.
When the column switch is in the main beam position, it also provides a feed to the main beam warning lamp located within the instrument pack (C0233). The warning lamp (C0230) is earthed on a B wire.
Headlamp Flash
Fuse 3 of the under seat fuse box (C0572) provides a constant battery feed to the column switch (C1739 on LHD, C1042 on RHD) on an NP wire. When the column switch is pulled forward against spring pressure, current flows across the column switch (C1739 on LHD, C1042 on RHD) to fuse 24 and fuse 25 of the passenger compartment fuse box (C0581) on a UW wire. Fuse 24 (C0581) provides a feed to the RH headlamp main beam bulb (C0011) on a UO wire. Fuse 25 (C0581) provides a feed to LH headlamp main beam bulb (C0009) on a US wire. Both bulbs are earthed on B wires.
When the column switch is pulled forward against spring pressure, it also provides a feed to the main beam warning lamp located within the instrument pack (C0233). The warning lamp (C0230) is earthed on a B wire.
300 Tdi
Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 1, fusible link 5, and fusible link 6 of the under seat fuse box (C0632) on an N wire. Fusible link 1 is connected in series with fuse 3, which is also located in the under seat fuse box. Fuse 3 (C0572) provides a constant battery feed to the column switch (C1739 on LHD, C1042 on RHD) on an NP 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 LHD, C0094 on RHD) 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 headlamp relay coil (C0282) is earthed on a B wire.
Side Lamps
When the lighting switch is moved to the side lamp position, current flows across the switch (C1082 on LHD, C0041 on RHD) to fuse 18 and fuse 19 of the passenger compartment fuse box (C0581) on an R wire. Fuse 18 (C0581) provides a feed to the following on RO wires:
- The RH front side lamp (C0537)
- The RH tail lamp (C0125 on 90 & 110, C0489 on 130 vehicles)
- The trailer socket (C0499).
All are earthed on B wires.
Fuse 19 (C0581) provides a feed to the following on RB wires:
- The LH front side lamp (C0538)
- The LH tail lamp (C0121 on 90 & 110 vehicles, C0490 on 130 vehicles)
- The number plate lamp (C0138 on 90 & 110 vehicles, C0140 on 130 vehicles)
- The trailer socket (C0499)
- The side lamp warning lamp (C0233) located in the instrument pack.
All are earthed on B wires.
Headlamps
When the lighting switch is moved to the headlamp position, current flows across the switch (C1082 on LHD, C0041 on RHD) to the energised headlamp relay (C0282) on a U wire. The headlamp relay (C0282) provides a feed to the column switch (C1739 on LHD, C1042 on RHD) on a U wire.
With the column switch in the dipped beam position, current flows across the switch (C1739 on LHD, C1042 on RHD) to fuse 22 and fuse 23 of the passenger compartment fuse box (C0581) on a UR wire.
Fuse 22 (C0581) provides a feed to the RH headlamp dipped beam bulb (C0011) on a UB wires. Fuse 23 (C0581) provides a feed to the LH headlamp dipped beam bulb (C0009) on a UK wire. Both bulbs are earthed on B wires.
With the column switch in the main beam position, current flows across the switch (C1739 on LHD, C1042 on RHD) to fuse 24 and fuse 25 of the passenger compartment fuse box (C0581) on a UW wire. Fuse 24 (C0581) provides a feed to the RH headlamp main beam bulb (C0011) on a UO wire. Fuse 25 (C0581) provides a feed to LH headlamp main beam bulb (C0009) on a US wire. Both bulbs are earthed on B wires.
When the column switch is in the main beam position, it also provides a feed to the main beam warning lamp located within the instrument pack (C0233). The warning lamp (C0230) is earthed on a B wire.
Headlamp Flash
Fuse 3 of the under seat fuse box (C0572) provides a constant battery feed to the column switch (C1739 on LHD, C1042 on RHD) on an NP wire. When the column switch is pulled forward against spring pressure, current flows across the column switch (C1739 on LHD, C1042 on RHD) to fuse 24 and fuse 25 of the passenger compartment fuse box (C0581) on a UW wire. Fuse 24 (C0581) provides a feed to the RH headlamp main beam bulb (C0011) on a UO wire. Fuse 25 (C0581) provides a feed to LH headlamp main beam bulb (C0009) on a US wire. Both bulbs are earthed on B wires.
When the column switch is pulled forward against spring pressure, it also provides a feed to the main beam warning lamp located within the instrument pack (C0233). The warning lamp (C0230) is earthed on a B wire.