Turn Signals: Description and Operation

TURN SIGNAL AND HAZARD LAMPS

Principles of Operation

Turn Signal Lamps

NOTE:The smart junction box (SJB) is also known as the generic electronic module (GEM).Voltage is supplied by the SJB to the indicator flasher relay when the ignition switch is in the RUN position. When the multifunction switch is placed in the LH or RH TURN position, voltage is routed to the multifunction switch, which then routes the voltage to the turn lamps. The electronic flasher relay then cycles the voltage on and off approximately 80 times per minute. If a front or rear turn bulb is inoperative, the electronic flasher relay cycles the voltage on and off approximately 160 times per minute.

Hazard Lamps

Voltage is supplied by the SJB to the indicator flasher relay at all times. When the hazard switch is engaged, voltage is routed to the multifunction switch, which then routes the voltage to all the turn lamps.