Exterior Lighting Controls

Exterior light controls are listed here in alphabetical order. See Fig. or see Fig. for exterior light locations. At the rear of the vehicle there are taillights, brake lights with turn signals, backup lights, and optional utility lights.

See Fig. for exterior and interior light switches.

Backup Lights

Backup lights are activated automatically when the vehicle is in reverse, and are designed to be used while backing up at night.

Clearance Lights

Press the upper half of the clearance lights switch to activate all clearance lamps including back-of-sleeper and mirrors.

Driving Lights

Driving lights are designed to extend the range of the high-beam headlights, and can only be activated when the headlight high-beams are on. When headlights are dimmed, the driving lights automatically turn off.

Fog Lights

Fog lights are designed to reduce glare in foggy conditions. The headlights must be on and set on low beam for the fog lights to activate.

Hazard Warning Lights

Press the upper half of the hazard light switch to activate all of the turn signal lights. Both of the telltales on the instrument cluster will flash. To cancel the hazard lights, press the lower half of the switch.

Headlights

The headlight switch is operated by pushing the upper half of the switch once for the parking lights, illuminating the taillights and side marker lamps on both the tractor and trailer. Pressing the upper half of the switch a second time activates the headlights. An audible warning will sound if the lights are left on when the ignition is turned off and the driver-side door is open.

High-Beam Headlights

With the low-beam headlights on, push the turn-signal lever away from you to turn on the high-beam headlights. See . To turn off the high-beam headlights, pull the lever to the middle position.

With the low-beam headlights on, pull the lever towards you to flash the high-beam headlights momentarily.

When the high-beam headlights are on, a blue telltale illuminates on the instrument cluster.

Headlight Interrupt

The headlight interrupt switch is located on the left-hand switch pod of the steering wheel. See Fig.. When the headlight interrupt switch is activated, the daytime running lights blink. The headlight interrupt switch only operates when the headlights are on.

Turn Signals

The turn-signal lever is mounted on the left-hand side of the steering column. Pulling the turn-signal lever up activates the right-turn signal; pushing it down activates the left-turn signal. The lever is typically a non-canceling combination turn-signal, windshield wiper/washer switch, and headlight control unit. See Fig..

When a turn signal is activated, a green telltale light flashes on the instrument panel.

On a self-canceling turn signal lever, the lever automatically returns to the neutral position when the steering wheel returns to the straight-ahead position after a turn.

Trailer Clearance Lights

The trailer clearance lights switch activates the trailer clearance lamps independent of the tractor lamps.

Utility Lights

Utility lights can be swivel-mounted on the upper half of the cab, or flush-mounted on the back of the cab or sleeper. Press the upper half of the switch to activate it. Press the lower half of the switch to turn it off.