Hazard Warning Lamps: Description and Operation

HAZARD LAMP OPERATION

Power is supplied at all times
- through 50 A fusible link (letter f , located in the fuse and fusible link box)
- to BCM terminal 70, and
- through 10 A fuse [No. 19, located in the fuse block (J/B)]
- to combination meter terminal 21.

Ground is supplied
- to hazard switch terminal 3
- to BCM terminal 67
- to combination meter terminals 23, 25 and 28
- through grounds F14, M57 and M61.

When the hazard switch is depressed, ground is supplied
- to BCM terminal 29
- through hazard lamp switch terminal 2.

The BCM then supplies power
- to front turn signal lamp LH terminal 3
- to front turn signal lamp RH terminal 3
- to rear turn signal lamp LH terminal 3
- to rear turn signal lamp RH terminal 3.

Ground is supplied
- to front turn signal lamp LH terminal 2
- to front turn signal lamp RH terminal 2
- through grounds E15 and E24, and
- to rear turn signal lamp LH terminal 5
- to rear turn signal lamp RH terminal 5
- through grounds B7 and B19.

The BCM sends a signal to combination meter across the CAN communication lines. This input is processed by the CPU of the combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.

With power and ground supplied, the BCM controls the flashing of the hazard warning lamps.