Turn Signal Indicator: Operation

The turn signal indicators give an indication to the vehicle operator that the turn signals (left or right indicator flashing) or hazard warning (both left and right indicators flashing) have been selected and are operating. These indicators are controlled by two individual hard wired inputs received by the cluster from the turn signal switch circuitry and hazard warning switch circuitry within the left multi-function switch. Each turn signal indicator Light Emitting Diode (LED) is grounded on the instrument cluster electronic circuit board at all times. Therefore, these indicators remain functional regardless of the ignition switch position. Each LED will only illuminate when it is provided battery current by the circuitry of the left multi-function switch.

The turn signal indicators are connected in series between the output of the combination flasher on the left multi-function switch and the left or right turn signal inputs to the instrument cluster, but in parallel with the other turn signal circuits. This arrangement allows the turn signal indicators to remain functional, regardless of the condition of the other circuits in the turn signal and hazard warning systems. The turn signal switch and hazard warning switch inputs to the instrument cluster can be diagnosed using conventional diagnostic tools and methods. (Refer to LIGHTING - EXTERIOR/LEFT MULTI-FUNCTION SWITCH - OPERATION ) for more information on the turn signal switch and the hazard warning switch.