Driver Controls 1 2 3 4 5 FOG LIGHTS DRIVING LIGHTS CL / ID LIGHTS HEAD LIGHTS BACKUP LIGHTS SLEEPER LIGHTS DASH LIGHTS TRAILER HEAD LT. INTERRUPT CL / ID LIGHTS 08/22/2011 9 8 7 6 f545815 1. Headlights Switch 2. Tractor Clearance Lights Switch 3. Driving Lights Switch 4. Fog Lights Switch 5. Backup Lights Switch (sometimes labeled Hook Up Lights ) 6. Headlight Interrupt Switch 7. Trailer Clearance Lights Switch 8. Sleeper Lights Switch 9. Dash Lights Switch Fig. 4.6, Exterior and Interior Light Switches Fog Lights Headlight Interrupt Fog lights are designed to reduce glare in foggy con- ditions. The headlights must be on and set on low beam for the fog lights to activate.
When the headlight interrupt switch is activated, the daytime running lights blink. The headlight interrupt switch only operates when the headlights are on. Hazard Warning Lights Headlights The hazard flasher switch is located underneath the turn signal lever, as shown in Fig. 4.7 . Pull the haz- ard light switch tab out to activate all of the turn sig- nal lights and both of the telltales on the lightbar will flash. To cancel the hazard lights, move the turn sig- nal lever up or down. 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. Western Star vehicles may be equipped with an op- tional hazard light switch located on the right-hand dash panel. To operate the hazard lights, press the upper half of the switch. To cancel the hazard lights, press the lower half of the switch. High-Beam Headlights With the low-beam headlights on, push the button on the end of the turn-signal lever to turn on the high- beam headlights. See Fig. 4.7 . Push the button again to turn the high-beams off. 4.4