Circuit Operation - Exterior Lights

STOP LIGHTS
The Stop Lights receive voltage through the WHT wire that feeds the Turn/Hazard Switch. With the switches in the positions shown in the schematic, the Stop Lights are connected to the WHT wire through the YEL and DK GRN wires and the turn switches. They come on when the Brake Switch is closed. If the Hazard Switch is moved to the "HAZARD" position, voltage to the Stop Lights is interrupted. Only the High Level Stop Light will light.

TURN LIGHTs
The Stop Lights also serve as the rear Turn Lights. If the Turn Left Switches in the Turn/Hazard Switch Assembly are closed to the left, the left Stop Light comes on. It gets battery voltage through the Turn Flasher, the Hazard Switch, the Turn Left Switch and the YEL wire. The LH Front Turn Light and the LH Turn indicator also come on. They are fed through the LT BLU wire. The current through the bulbs heats the Turn Flasher. it opens and closes to flash the Left Turn Lights.

The Right Turn Lights operate in a similar way when the Turn Right Switches are closed to the right.

If the Brake Switch is closed at the same time that the Turn Left or Right Switch is closed, the Turn Lights all continue to receive power through the Turn Flasher. The LH Stop/Turn Light at the rear turns on, as long as the Brake Switch is closed.

HAZARD LIGHTS
If the Hazard Switches are moved to the "HAZARD" position, the Stop/Turn Lights will flash simultaneously. In this situation, power for all the lamps comes through the Hazard Flasher.

FRONT MARKER LIGHTS
The Front Marker Lights can be lit by either the Park Lights or the Turn Lights. Neither of the two wires to each of the marker bulbs is a ground wire.

With the Park Lights on, battery voltage is supplied through the BRN wires to both Marker Lights. The path to ground for the marker bulb is through the Turn Lights. The small Marker Light bulbs light up, but not the larger turn bulbs.

When the Turn Lights are on, but not the Park Lights, battery voltage is applied through the LT BLU and DK BLU wires to the Marker Lights. They glow since they are grounded through the entire Park Light system.

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

With Daytime Running Lamp (DRL) equipped vehicles, the Front Marker Lights will not flash when the turn signals are applied. They will turn on only when the Park Lights are turned on. The Front Marker Lights for DRL vehicles are not grounded through the turn signal bulbs, but are grounded through ground CKT 150.

CENTER HIGH MOUNTED STOPLAMP(CHMSL)
The Center High Mounted Stoplamp receives voltage through the Brake Switch when the brake pedal is depressed. if the Hazard Switch is moved to the "HAZARD" position, voltage to the Stop Lights is interrupted, but the Center High Mounted Stoplamp will light with the brake pedal depressed.