Exterior Light Controls

When the panel lights are on, most switch legends are backlit with a colored light, typically green, to allow the driver to find switches more easily in the dark. When a switch is activated, the switch icon is backlit with a colored light, typically amber.

Exterior light controls are listed here in alphabetical order.

Hazard Warning Light Switch

The hazard warning light flasher (see Fig. ) is a red rocker switch located on the top of the steering column.

To activate the hazard warning lights, press the upper part of the rocker (pushing towards the dash). To deactivate the hazard warning lights, press the lower part of the switch (towards the steering wheel).

Headlight Switch

A three-position headlight paddle switch (see Fig. ) on the left-hand dash is used to operate the low-beam headlights.

When the switch is in the uppermost position, the headlights and all other exterior lights (excluding the optional fog, spot, and utility lights) are on. All vehicle lighting is off when the switch is in the middle position. When the switch is in the downward position, only the clearance lights, marker lights, and the taillights are illuminated.

When the any exterior lights are on, the instrument panel lights also illuminate.

High-Beam Headlight Control

With the low-beam headlights on, push the turn signal lever forward (toward the windshield) to turn on the high-beam headlights. Pull the turn signal lever back to the neutral position to turn the high-beams off. See Fig..

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 light illuminates on the instrument cluster between the tachometer and speedometer.

The low-beam headlights remain on continuously during high-beam headlight operation. If the low-beams are turned off, the high-beams turn off also.

Marker Light Interrupt Switch

The marker light interrupt (MRKR INT) paddle switch (see Fig. ) temporarily deactivates the marker lights and taillights, if equipped.

With the vehicle lights on, raise and hold the paddle switch to briefly turn off the marker lights and taillights. The dash lights will flash with the marker lights when the switch is actuated. When the paddle is released the marker lights will return to normal operation. With the vehicle lights off, raise the paddle switch briefly to turn the marker lights on.

Panel Light Increase/Decrease Switch

When the instrument panel lights are on, they can be brightened or dimmed by using the INCR/DECR rocker switch (see Fig. ), located just below the headlight switch.

To brighten the panel lights, press the upper part of the rocker switch. To dim the panel lights, press the lower part of the rocker switch.

Spotlight Switch

The spotlight switch is located on the pivoting handle of the spotlight. There may be a single spotlight assembly mounted on the driver's door, or one on each door.

Utility Light Switch

The utility light switch, if equipped, operates one of the following lights or sets of lights:

• A single utility light swivel-mounted in the center of the cab roof;

• Two fixed utility lights mounted on each side of the cab roof;

• Two flush-mounted utility lights mounted on each side of the back of the cab.

To turn the utility light(s) on, press the upper part of the utility light (UTLY LAMP) rocker switch (see Fig. ). To turn the utility light(s) off, press the lower part of the rocker switch.