Hazard Warning Lamps: Description and Operation

HAZARD LAMP OPERATION

Power is supplied at all times
- to BCM (body control module) terminal 55
- through 50 A fusible link [letter F, located in the fuse and fusible link box], and
- to combination meter terminal 43
- through 10 A fuse [No. 19, located in the fuse block (J/B)].

Ground is supplied
- to hazard switch terminal 3
- through grounds M30 and M66,
- to BCM terminal 52
- through grounds M30 and M66, and
- to combination meter terminals 45 and 46
- through grounds M30 and M66.

When the hazard switch is depressed, ground is supplied
- to BCM terminal 29
- through hazard switch terminal 1.

The BCM then supplies power
- through BCM terminal 45
- to front combination lamp LH terminal 6
- to rear combination lamp LH terminal 5
- through BCM terminal 46
- to front combination lamp RH terminal 6
- to rear combination lamp RH terminal 5.

Ground is supplied
- to the front combination lamp LH terminal 4 through grounds E17 and E43
- to the front combination lamp RH terminal 4 through grounds E17 and E43
- to the rear combination lamp LH terminal 4 through grounds B5 and B103
- to the rear combination lamp RH terminal 4 through grounds B5 and B103.

The BCM also supplies input to combination meter terminals 27 and 28 across the CAN communication lines.

This input is processed by the unified meter control unit in the combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.

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