Hazard Warning Lamps: Description and Operation

HAZARD LAMP OPERATION
Power is supplied at all times
- through 50 A fusible link (letter F, located in fuse, fusible link and relay box)
- to BCM terminal 55,
- through 10 A fuse [No. 18, located in fuse block (J/B)]
- to BCM terminal 42,
- through 10 A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 21.

Ground is supplied
- to hazard switch terminal 1
- through grounds M30 and M66,
- to BCM terminal 52
- through grounds M30 and M66,
- to combination meter terminals 1, 24 and 25
- through grounds M30 and M66.

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

BCM then supplies power
- through BCM terminal 45
- to front combination lamp LH terminal 6, and
- to rear combination lamp LH terminal 3,
- through BCM terminal 46
- to front combination lamp RH terminal 6, and
- to rear combination lamp RH terminal 3.

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

The BCM also supplies input to combination meter terminals 4 and 5 across CAN communication lines. This input is processed by unified meter control unit in combination meter, which in turn supplies ground to the left and right turn signal indicator lamps.
With power and input supplied, BCM controls flashing of hazard warning lamps.