Hazard Warning Lamps: Description and Operation

DIRECTION INDICATOR / HAZARD WARNING LAMPS

DESCRIPTION

General
The hazard warning switch is mounted on the centre of the fascia. When pressed, both sets of direction indicator lamps operate simultaneously.

OPERATION

Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fusible link 3, fusible link 4, and fuse 53 of the passenger compartment fuse box (C0632) on an R wire. Fusible link 3 (C0589) and fusible link 4 (C0590) provide constant battery feeds to the Light Check Module (LCM) (C0937 & C2039 respectively) on a pair of R wires.

Fuse 53 of the passenger compartment fuse box (C0583) provides a constant battery feed to the ignition switch (C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 'auxiliary' position, current flows across the switch (C0028 on V8 vehicles) to fuse 9 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 9 (C0587) provides an auxiliary ignition feed to the Light Check Module (LCM) (C2040) nn a PY wire.

When the ignition switch is turned to the 'ignition' position, current flows across the switch (C0028 on V8 vehicles) to fuse 4 of the passenger compartment fuse box (C0585) on a G wire. Fuse 4 (C0587) provides an ignition feed to the LCM (C2040) on a GS wire.

The LCM (C2039) is earthed on an N wire.

Hazard Warning Lamps
If an impact severe enough to trigger the airbags is detected, the SRS DCU sends a K bus message to the instrument pack requesting the hazard warning lamps be initiated. This is relayed to the LCM (C2040) via the I bus on a WSY wire.