Hazard Warning Lamps: Description and Operation

HAZARD LAMP OPERATION

Power is supplied at all times
- through 50 A fusible link [letter M, located in the fuse and fusible link box]
- to BCM (body control module) terminal 55
- through 10 A fuse [No. 19, located in the fuse block (J/B)]
- to combination meter terminal 8
- through 10 A fuse [No. 20, located in the fuse block (J/B)]
- to rear combination lamp control unit terminal 1.

Ground is supplied
- through BCM (body control module) terminals 49 and 52
- to grounds M35, M45 and M85
- through rear combination lamp control unit terminal 7
- to grounds E21, E50 and E51
- through combination meter terminals 5, 6 and 15
- to grounds M35, M45 and M85.

When the hazard switch is depressed, ground is supplied
- through BCM terminal 29
- to hazard switch terminal 2
- through hazard switch terminal 1
- to grounds M35, M45 and M85.

When the hazard switch is depressed, BCM (body control module) output turn signal from BCM (body control module) terminals 45 and 46, interpreting it as turn signal is ON.

Connected from BCM (body control module) terminal 45 and 46 to front combination lamp terminal 4.

Turn signal lamp turns on
- through front combination lamp terminal 8
- to grounds E21, E50 and E51.

Connected form BCM (body control module) terminals 45 and 46 to rear combination lamp control unit terminals 4 and 5.

Rear turn signal (LED) turns on
- through rear combination lamp control unit terminal 11
- to rear combination lamp LH terminal 3
- through rear combination lamp LH terminal 4
- to rear combination lamp control unit terminal 10
- through rear combination lamp control unit terminal 9
- to rear combination lamp RH terminal 3
- through rear combination lamp RH terminal 4
- to rear combination lamp control unit terminal 8.

BCM (body control module) sends signal to unified meter and A/C amp. through CAN communication lines, and turns on turn signal indicator lamp with combination meter.

When rear turn signal lamp (LED) does not turn on, Rear combination lamp control unit sends signal to and unified meter and A/C amp. unified meter and A/C amp. turn LED burnout status signal to BCM (body control module) through CAN communication lines for speeding up turn signal blinking.