Turn Signals: Description and Operation

Turn Signal

With the Ignition Switch in RUN, current flows through Fuse 5, the Electronic Flasher, the Turn Switch and on to the Turn Lamps and Indicators.

The Turn Switch sends the power to either the Left or Right Turn Lamps.

Front Park/Front Side Marker Lamps

The Front Side Marker Lamps are lit by either Front Park/Turn Lamp. Neither of the two wires to each of the marker bulbs is a ground wire.

With the Park Lamps in, battery voltage is supplied through the 14 (BR) wires to both Marker Lamps. The path to ground for the marker bulbs is through the Turn Lamps. The small marker lamp bulbs light up, but the larger Turn Lamp bulbs do not.

When the Turn Lamps are on, but the Park Lamps are not, battery voltage is applied through the 2 (W/LB) and 3 (LG/W) wires to the Marker Lamp. They glow since they are grounded through the entire Park Lamps system. As before, the smaller marker bulbs light up, but not all the parking lamp bulbs.

If both the Park Lamps and a set of Turn Lamps are on at the same time, the marker bulb for that side will not light up. With battery voltage on both the sides of a bulb, the bulb will not glow. When the Turn Lamps flash on and off, however, the marker bulb on that side will light up since it is now grounded through the Turn Lamps. The circuit makes the turn and marker lamp bulbs flash out of step with each other when the Park Lamps are on.