Driver Controls and Instruments Instruments and Controls Identification The key can be inserted and removed only from the off position (key slot is vertical). The headlights (low beam only), brake lights, road lights, dome lights, clearance lights, turn signals, hazard warning lights, parking lights, and the cigarette lighter operate with the ignition switch off, regardless of whether or not the key is inserted. Figure 3.1 represents a typical Freightliner dash equipped with all of the standard and many of the op- tional instruments and controls for left-hand-drive (LH DR) vehicles equipped with electronic engines. Figure 3.2 shows the Level I ICU gauge portion of the dash for those vehicles.
In the accessory position (key is turned counterclock- wise), the wipers, heated mirrors, backup lamps, radio, ether start system, and all electric gauges operate. Figure 3.3 represents the gauge portion of a typical right-hand-drive (RH DR) vehicle, or a vehicle with a mechanical engine. Turn the key fully clockwise to the start position only when starting the engine. When the engine starts, re- lease the key. When released, the key will move to the on position. NOTE: Right-hand-drive vehicles are built with the instrument control panel on the right side of the dash. The instrument configurations and control instructions in this manual are for left-hand-drive vehicles.
In addition, dash gauges in right-hand- drive vehicles feature metric units of measure. In the on position (key turned 45 degrees clockwise), all electrical systems are operable. Warning lights and buzzer for low air pressure and low oil pressure operate until the engine is started and minimum pressures are built up. Mirror Heat Switch, Optional Controls Ignition Switch and Key One or both outside door mirrors can be heated to keep them defrosted. See Fig. 3.5 . The ignition switch can be turned to four positions: off, accessory, on, and start. See Fig. 3.4 . The ignition switch key also locks and unlocks the cab doors.
Panel Light Dimmer Switch The panel lights are turned on by the headlight switch. The panel light rheostat controls the brightness of the instrument panel lights. Slide the control lever up to 3.1