Hazard Warning Lamps

The BCM monitors a hardwired input from the hazard switch in the lower instrument panel switch pod located in the center of the air conditioner and heater control head to determine whether the hazard warning system has been selected. When the hazard warning system is selected, the BCM controls hazard warning system operation and flash rate by energizing and de-energizing high side drivers, which controls battery voltage outputs on the right and left turn signal feed circuits. The BCM also sends electronic hazard switch status  messages to the IPC over the CAN data bus to control the illumination and flash rate of the left and right turn signal indicators, as well as to control the click rate of an electromechanical relay soldered onto the IPC electronic circuit board that emulates the sound emitted by a conventional hazard warning flasher.