Circuit Operation - Exterior Lights

PARK, MARKER, TAIL AND LICENSE LAMPS
Voltage is applied at all times from the PARK LAMPS Fuse to the Headlamp Switch from CKT 1340. With the Headlamp Switch in PARK or HEAD, voltage is applied to CKT 9. Current flows through CKT 9, to all Park, Side Marker, Tail and License Lamps turning them on. The only lamps that receive current from CKT 9 and do not turn on are the turn filaments in the Park/Turn Lamps. They do not turn on because the voltage drop across the Front Side Marker Lamps is much greater than that across the Turn Lamp Filaments.

TURN LAMPS
With the Ignition Switch in RUN, BULB TEST or START, voltage is applied from the TURN Fuse to the normally closed pole of the Turn Signal Switch to the Hazard Lamp/Turn Signal Lamp Flasher back to the Turn Signal Switch. With the Turn Switch in the TURN LEFT position, voltage is applied from the Turn Switch to CKT 14 at terminal A7 of the Turn Signal Switch connector C201 and to CKT 18 at terminal A6 of C201. LH Front Turn, Rear Turn and Indicator Lamps flash on and off as current flow heats the timing element in the Hazard Lamp/Turn Signal Lamp Flasher, and it continuously opens and closes the CKT (for RH Turn Lamps CKT 15 terminal A6 of C201 and CKT 19 terminal A7 of C201). With Park Lamps on and Turn Lamps on, voltage is applied to both terminals of the Front Side Marker Lamp causing it to be off. When the Front Turn Lamp is off, voltage is applied to only one terminal of the Marker Lamp, causing it to flash on. The Turn Lamp and the Marker Lamp continue to flash on and off out of sequence until the Turn Signal Switch is turned off.

HAZARD LAMPS
Voltage is applied at all times from the HAZARD Fuse to the normally open poles of the Hazard Switch in the Turn Signal Switch. With the Hazard Switch in HAZARD, voltage is applied to the Hazard Lamp/Turn Signal Lamp Flasher and back to the Turn Signal Switch. All of the Turn Lamps and both Turn Indicators flash on and off.

STOPLAMPS
Voltage is applied at all times from the STOP LAMP Fuse to the Stoplamp Switch. When the brake pedal is depressed, voltage is applied from the Stoplamp Switch and Turn Signal Switch to CKT 17 turning on the LH and RH Tail/Stop/Turn Lamps.

When the brake pedal is depressed, voltage is also applied from the Stoplamp Switch to CKT 17 and the Center High Mounted Stoplamp, turning on the Center High Mounted Stoplamps. The Center High Mounted Stoplamp is not affected by the Turn Signal Switch.