Interior Lighting Controls

The cab is equipped with door-activated dome lamps on the ceiling and under the overhead console, and courtesy lights on the bottom edge of each door and under the dash. Depending on vehicle configuration, there may also be LH and RH reading/map lamps.

When the instrument panel lights are on, most switch icons are backlit with a colored light to allow the driver to find switches more easily in the dark. When a switch is activated, an LED on the switch is illuminated.

For sleeper and baggage compartment lights, see Power Mirrors.

Dash Lights

The dash lights are controlled by the dash lights switch (see Fig., item 9). With the headlight switch in position 1 (marker lights on) or position 2 (headlights on), tapping the upper half of the dash lights switch increases the instrument cluster and switch backlighting incrementally. Note that tapping the switch past the maximum setting also activates the dome lamps and courtesy lights. Tapping the lower half of the switch dims the dash lights.

Cab Dome Lamps and Courtesy Lights

The dome lamps on the cab ceiling and overhead console, and the courtesy lights on the cab doors and under the dash are activated when a cab door is opened. Closing the doors will cause the lights to be turned off after 30 seconds. If a cab door is left open, a timer turns the lights off after 15 minutes.

Both the ceiling and overhead console dome lamps can be activated using the dash lights switch (see Fig., item 9) when the headlight switch is in position 1 (marker lights on) or position 2 (headlights on). Tap the top half of the dash lights switch until the dome lamps are activated. Tap the bottom half of the switch to turn the dome lamps off.

Overhead Console Dome/Reading Lamps

The overhead console dome/reading lamps (see Fig.) are powered by both the ECC module and the battery. When powered by the ECC module, they are controlled together with the cab dome lamps (see "Cab Dome Lamps and Courtesy Lights" above). They can also be operated individually (when not powered by the ECC module) by pushing on the lens.

Red Map Lamps

The red map lamps (see Fig.) on the overhead console are operated by pushing on the lens.