Turn Signals: Description and Operation

With the Ignition Switch in RUN, BULB TEST or START, voltage is applied through the TURN B/U Fuse and the Turn Flasher to the normally closed contact of the Hazard Switch in the Turn/Hazard-Headlight Switch Assembly.

With the Turn Switch in the LEFT position, voltage is applied to both the LH Turn Indicator and the LH Front Park/Turn Light (LT BLU wires). Voltage is also applied to the LH rear Turn Light (YEL wire). The lights go on immediately. They begin to flash when the current flow heats up the timing element in the Turn Flasher and it repeatedly opens and closes the circuit.

The voltage applied to the LH Front Park/Turn Light will also be applied to the LH Front Marker Light. If the Headlight Switch is OFF, the LH Front Marker Light will find a path to ground through splice S105 and the Front Park/Turn Lights. These lights provide low resistance paths to ground. The Marker Light will flash with the Turn Lights. The lights used for the ground path will not flash, however, since the voltage drop across the Marker Light is much higher than that across the other lights.

When the Headlight Switch is in either PARK or HEAD, voltage is applied through the PK/TURN Fuse, the Headlight Switch, and splice S105 to the Marker and Park Lights. If the Turn Switch is in LEFT, the LH Front Marker Light will have voltage at both connections and will not light. When the Turn Flasher stops voltage to the Turn Light, the Marker Light will be grounded through the Turn Light and will go on. In this way, the LH Front Marker Light will flash on when the LH Front Park/Turn Light goes off, and off when the Turn Light goes on.

With the Turn Switch in RIGHT, voltage is applied to the RH lights in a similar way.