Head, Side and Tail Lamps - Canada

Description
Daylight running lamps are fitted to Canadian specification vehicles only. The following lamps will operate when the engine is running, irrespective of lighting switch position.

NOTE: Daylight running lamps are extinguished when the vehicle is in 'Park'.

^ Headlamps (dipped beam only)
^ Side lamps
^ Tail lamps
^ Side marker lamps
^ Number plate lamps.

NOTE: Instrument illumination is not operational until the lighting switch is moved to the side or headlamp position.

Operation
Feed from the positive battery terminal (C0192) is supplied to fusible link 3, fusible link 9, and fusible link 12 (C0632) on an R wire. Fusible link 12 (C0575) provides a constant battery feed to the lighting switch (C0041) and the daylight running relay (C0212) on an RN wire. A second constant battery feed is provided by fusible link 12 (C0570) to the lighting switch (C0041) and the daylight running relay (C0212) on a UN wire.

Fusible link 9 (C0570) provides a constant battery feed to the headlamp main/dipped beam relay (C0587) on an N wire. The headlamp main/dipped beam relay is 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 fuse 3 of the passenger compartment fuse box (C0588) on an NW wire. Fuse 3 (C0581) provides an ignition feed to the daylight running relay (C0212) on a GR wire.

The ignition switch (C0028) also provides a feed to fuse 18 of the passenger compartment fuse box (C0588) on a G wire. Fuse 18 provides an ignition feed to the Central Control Unit (CCU) (C0593), which is mounted directly onto the rear of the passenger compartment fuse box.

Side Lamps
When the lighting switch is turned to the side lamp position, current flows across the switch (C0041) to the daylight running relay (C0212) on an RW wire. Current flows through the daylight running relay (C0212) to fuse 7 and fuse 17 of the passenger compartment fuse box (C0587) on an R wire. Fuse 17 (C0580) provides a feed to the following on RO wires:
^ The RH side lamp (C0011).
^ The bumper mounted RH tail lamp (C0125).
^ The E-post mounted RH tail lamp (C0489).
^ The rear number plate lamp (C0138).
^ The trailer pick-up (C0499) (RO then B wire).

All are earthed on B wires except the trailer pick-up, which is earthed on a W then B wire.

Fuse 7 (C0581) provides a feed to the following on RB wires:
^ The LH side lamp (C0009).
^ The bumper mounted LH tail lamp (C0121).
^ The E-post mounted LH tail lamp (C0490).
^ The trailer pick-up (C0499) (RB then N wire).

All are earthed on B wires except the trailer pick-up, which is earthed on a W then B wire.

Headlamps

Dipped Beam
When the lighting switch is turned to the headlamp position, current flows across the switch (C0041) to the daylight running relay (C0212) on a UG wire. Current flows through the relay (C0212) to fuse 19 and fuse 20 of the passenger compartment fuse box (C0587) on a UO wire. Fuse 19 (C0581) provides a feed to the RH dipped beam bulb (C0011) on a UB wire. Fuse 20 (C0581) provides a feed to the LH dipped beam bulb (C0009) on a UK wire. Both are earthed on B wires.

Main Beam
When the lighting switch is turned to the headlamp position, and pulled back to the main beam position, current flows across the switch (C0041) to the main/dipped beam relay coil (C0586) on a UW wire. The main/dipped beam relay coil is located within the passenger compartment fuse box (C0587) and is earthed on a B wire.

The energised main/dipped beam relay allows a feed from fusible link 9 of the engine compartment fuse box (C0570) to provide a feed to fuse 14 and fuse 34 of the passenger compartment fuse box. Fuse 14 (C0584) provides a feed to the RH headlamp main beam bulb (C0011) on a UG wire. Fuse 14 (C0589) also provides a feed to the warning lamp located within the instrument pack (C0233) on a UG wire. Both are earthed on B wires.

Fuse 34 (C0587) provides a feed to the RH main beam bulb (C0009) on a US wire. The bulb (C0009) is earthed on a B wire.

Headlamp Flash
When the LH column switch is pulled back (but not past) spring pressure, the headlamps operate in exactly the same way as described in the 'Main Beam' section until the switch is released.

CCU
When the lighting switch is turned to the main beam position, current flows across the switch (C0041) to the CCU (C0428) on a UG wire. The CCU also monitors the condition of the driver door switch (C0441) on a PS then PW wire, and the ignition switch. If the driver door switch is closed and the ignition switch in the 'off' position, the CCU will power its integral 2 KHz sounder.

Daylight Running Lamps
The daylight running lamps will be operational if the following conditions are met:
^ The ignition switch is in the 'ignition' position.
^ The engine is running.
^ The automatic transmission isn't in 'Park'.
^ The lighting switch isn't in the 'Headlamp' position.

The CCU (C0593) is provided an ignition feed via fuse 18 of the passenger compartment fuse box, and registers if the engine is running via the oil pressure switch. The CCU (C0592) provides a feed to the oil pressure switch (C0187) on a WN wire. The oil pressure switch contacts are closed when there is no oil pressure. When the engine is started, the rise in oil pressure causes the switch contacts to open.

If 'Park' is selected, the automatic transmission selector (C0244) provides a feed to the CCU (C0593) on a KO wire.

The CCU (C0428) monitors the condition of the lighting switch (C0041) via a UG wire. A feed will only be provided to the CCU when the lighting switch is turned to the 'Headlamp' position.

If all of these conditions are met, the CCU (C0593) provides an earth path for the daylight running relay (C0212) on an RG wire. This allows a battery feed from fusible link 12 of the engine compartment fuse box (C0570) to flow through the relay (C0212) and power the headlamp dipped beam bulbs as described previously.