Hazard Warning Lamps: Description and Operation

Turn Signal And Hazard Warning Lamps Schematic

HAZARD LAMP OPERATION
Power is supplied at all times
- through 50 A fusible link (letter j, located in fuse, fusible link and relay box)
- to BCM terminal 70,
- through 10 A fuse [No. 21, located in fuse block (J/B)]
- to BCM terminal 57,
- through 10 A fuse [No. 19, located in fuse block (J/B)]
- to combination meter terminal 1.

Ground is supplied
- to hazard switch terminal 1,
- to BCM terminal 67, and
- to combination meter terminals 3 and 21
- through grounds M57 and M61.

When hazard switch is depressed, ground is supplied
- through hazard switch terminal 2
- to BCM terminal 29. BCM then supplies power
- to front combination lamp LH terminal 4 and
- to rear combination lamp LH terminal 6
- through BCM terminal 60,
- to front combination lamp RH terminal 4 and
- to rear combination lamp RH terminal 6
- through BCM terminal 61. Ground is supplied
- to front combination lamp LH and RH terminal 2
- through grounds E9, E15 (all models) and E24 (with MR20DE),
- to rear combination lamp LH and RH terminal 4
- through grounds B7 and B19.

The BCM also supplies input to combination meter across the 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.