Operation - Section 32 OM3223 Page 32-16 Operator Cab and Controls Light Switch The instrument panel lights, clearance lights, and the head- lights are controlled by this three position light switch (27). The OFF position is selected by pressing the bottom of the switch. Press the top of the switch until it reaches the first detent to select the panel, clearance, and tail lights only. Press the top of the switch again, until it reaches the second detent to select headlights, as well as panel, clearance, and tail lights. Panel Light Dimmer Panel light dimmer control (29) is a rheostat which allows the oper- ator to vary the brightness of the instruments and panel lights.
Rotating the knob to the full counterclockwise position turns the panel lights on to the brightest condition. Rotating the knob clockwise continually dims the lights until the OFF position is reached at the full clockwise rota- tion. Payload Meter Switch Payload meter switch (30) is a two-way, momentary switch. The top position is the SELECT position. The SELECT position is used to step through the differ- ent displays. The lower position is the SET position. The SET position is used to set the opera- tor ID or clear the load and total ton counters. Refer to Section 60, Optional Equipment, for a more com- plete description of the payload meter system and its functions.