Turn Signals: Description and Operation
GENERAL DESCRIPTI0NDirectional signal lamps are combined with the parking lamps on the front of the vehicle. Turn on the ignition switch in order to operate the directional signal lamps with the turn signal switch.
With the directional signal lever in the center position, stepping on the brake pedal illuminates the rear stoplamps on both sides. If the switch is operating on either side as a directional signal, stepping on the brake pedal turns on the stoplamp only on the side that is not flashing.
The flasher that is used in this circuit controls only the directional signals. The flasher is located in the center instrument panel area.
The lane-change directional signal switch is standard equipment. When making a partial turn, such as when changing lanes, the driver has the option of moving the switch lever to a detent stop. The signal lamps will continue to flash as long as the lever is held in this position. The signal lamps will cancel automatically when the lever is released. Use the detent position in order to signal a shallow turn or lane change without possibility of failure to cancel.
Moving the directional signal switch lever past the detent position to the limit of the lever's travel for either turn will provide conventional turn signal operation. The front sidemarker lamps will flash with the turn signal lamps when the park lamps and headlamps are oft. When the parking lamps or the headlamps are on, the front sidemarker lamps will flash alternately with the turn signal lamps on the same side of the vehicle.
With the headlamp switch in the ON position, the multifunction (turn signal) lever also functions as the headlamp dimmer control. Perform the following steps in order to switch the headlamps to high beam or low beam:
1. Pull the lever toward the driver until a click is heard.
2. Release the lever.
CIRCUIT DESCRIPTION
When the ignition switch is in the ON or the START position, voltage is applied through the TURN LPS fuse to the normally closed contacts of the hazard switch. A single flasher internal to the hazard switch performs the following functions:
^ Operates the turn signal
^ Operates the hazard flasher
When the turn switch is in the LEFT position, voltage is applied to the following components:
^ The left turn indicator
^ The left front park/turn lamp
^ The left rear turn lamp
The lamps immediately turn ON and flash as the flasher opens and closes the circuit. If a bulb is in need of replacement, the turn lamps will flash at twice the normal rate.
The voltage applied to the left front park/turn lamp is also applied to the left front marker lamp. When the turn/headlamp switch assembly is OFF, the left and right front marker lamps find a path to a ground through the left and right front park/turn lamps. The front park/turn lamps provide low resistance paths to ground. The left front marker lamp flashes with the turn lamps. The lamps used for the ground path will not flash because the voltage drop across the marker lamp is much higher than the voltage drop across the other lamps.
When the headlamp switch is in the PARK or the HEAD position, voltage is applied to the following components:
^ The marker lamps
^ The park lamps
When the turn switch is in the LEFT position, the following conditions exist:
^ The left marker lamp has voltage at both connections.
^ The left marker lamp does not light.
When the flasher stops the voltage to the turn lamp, the following conditions exist:
^ The marker lamp is grounded through the turn lamp.
^ The marker lamp lights.
The left front marker lamp flashes ON when the turn filament of the left front park/turn lamp turns OFF. The left front marker lamp flashes OFF when the turn filament of the left front park/turn lamp turns ON.
When the turn switch is in the RIGHT position, voltage is applied to the following components:
^ The right turn indicator
^ The right front park/turn lamp
^ The right rear turn lamp
The lamps immediately turn ON and flash as the flasher opens and closes the circuit. If a bulb is in need of replacement, the turn lamps will flash at twice the normal rate.
The voltage applied to the right front park/turn lamp is also applied to the right front marker lamp. When the turn/headlamp switch assembly is OFF, the left and right front marker lamps find a path to a ground through the left and right front park/turn lamps. The front park/turn lamps provide low resistance paths to ground. The right front marker lamp flashes with the turn lamps. The lamps used for the ground path will not flash because the voltage drop across the marker lamp is much higher than the voltage drop across the other lamps.
When the headlamp switch is in the PARK or the HEAD position, voltage is applied to the following components:
^ The marker lamps
^ The park lamps
When the turn switch is in the RIGHT position, the following conditions exist:
^ The right marker lamp has voltage at both connections.
^ The right marker lamp does not light.
When the flasher stops the voltage to the turn lamp, the following conditions exist:
^ The marker lamp is grounded through the turn lamp.
^ The marker lamp lights.
The right front marker lamp flashes ON when the turn filament of the right front park/turn lamp turns OFF. The right front marker lamp flashes OFF when the turn filament of the right front park/turn lamp turns ON.