INSTRUMENTS AND CONTROLS 81 Daytime running lights offer additional safety when driving in low light conditions when the operator may not normally turn the headlights on. Having headlights on at all times makes the vehicle easier to spot in bad weather, dusk or shade or when there is glare. DRL offers the ability for drivers to give a courtesy flash as a signal when it is safe to merge into another lane on the highway. Turning DRL off temporarily for slowly rolling through weigh stations or when waiting in line to receive bill and weighing tickets is convenient. When the operator presses the DRL override switch, the headlamps will go out if below the DRL speed threshold and flash if above the DRL speed threshold for a designated period of time (customer programmable in VCADS). It is also possible to toggle the headlamps back on if necessary. • Engine Brake Switch – Used to activate the engine brake. Refer to the section in this handbook for more information. • Fan Control Manual Override Switch – Allows the operator to manually control the engine cooling fan. • 5th Wheel Slide Switch – Locks and releases a sliding 5th wheel using air pressure; this allows the 5th wheel to be properly positioned. The indicator lamp will illuminate when the 5th wheel is unlocked. Prior to model year 2001, it was necessary to use the trailer Hand Brake Control Lever to activate the 5th wheel slide function. This feature has been changed to make the air slide switch independent of the hand brake control, thereby preventing unexpected 5th wheel slide. • Inside/Outside Air Switch – Allows the operator to choose whether outside air or "under the hood" air is fed into the air cleaner. • Load Light Switch – Press top of the switch in to turn light on. Press bottom of switch to turn light off. • Mirror Defrost – Push the top in to activate mirror defrost. • Motorized-Mirror Joy Stick – This control is designed like a "joy stick." ROTATE the stick to the right to control the right mirror. ROTATE the stick to the left to control the left mirror. PUSH the stick up, down, left or right, as indicated, to correctly position the selected mirror.
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