With the lighting switch in either the side lamp or headlamp position, the interior controls and gauges are illuminated so they can be easily located during night driving. Interior illumination is not controlled by the ignition switch.
Operation
Feed from the battery positive terminal is connected to fusible link 6 of the engine compartment fuse box (C0632-1) by a brown wire. Current flows across fusible link 6 (C0571-3) to the lighting switch (C0041-1) on a brown/blue wire. With the lighting switch in either the side lamp or headlamp position (C0041-2), current will flow to fuse 12 of the passenger compartment fuse box (C0581-1) on a red wire. Fuse 12 (C0581-4) supplies a feed to the following switches and gauges on red/orange wires:
- The cigar lighter (C0074-1).
- The fuel gauge (C1055-1).
- The engine coolant temperature gauge (C1053-1).
- The clock (C0232-1)
- The LH heater control (C1199-1).
- The RH heater control (C1200-1).
- The speedometer (C1060-4).
All the above are earthed on black wires.