Driver Controls
Ignition Switch
The ignition switch is located on the left-hand dash,
below the headlight switch.
The ignition switch has four positions: OFF, ACC (ac-
cessory), ON, and START. See
02/03/2017
Fig. 4.1, Ignition Switch
In the OFF position, the ignition switch is vertical.
The key can be inserted and removed only in the
OFF position.
The following functions are operable when the igni-
tion switch is in the OFF position (regardless of
whether the key is inserted):
•
low-beam headlights
•
taillights
•
brake lights
•
road lights
•
dome lights
•
clearance lights
•
hazard warning lights
•
utility lights
•
baggage compartment lights
•
spotlights
•
electric horn
•
clock
•
refrigerator
•
CB radio
•
power mirrors
4.1
Fig.
4.1.
f610805
•
power receptacle
•
fuel heater
•
electric oil pan heater
•
electric or diesel-fired engine coolant pre-
heater
Turn the key counterclockwise to reach the ACC po-
sition. In addition to all the functions that are oper-
able in the OFF position, the following functions are
operable when the switch is in the ACC position:
•
radio/stereo system
•
heater and A/C fan
•
mirror defog
•
windshield fan
•
ether start system
•
air dryer
•
backup lights
Turn the key clockwise past the OFF position to
reach the ON position. With the switch in the ON po-
sition, all electrical systems become operable and
the warning and indicator lamps illuminate. Wait for
three seconds before starting the engine.
IMPORTANT: Do not crank the engine until the
ICU self-check is complete.
Turn the key clockwise past the ON position to reach
the START position to start the engine. Release the
key the moment the engine starts. Do not operate
the starter longer than thirty seconds, then allow the
starter to cool between attempts. If the starter over-
heats, the starter protection system will prevent op-
eration of the starter until it has cooled. Release the
key the moment the engine starts.
The ignition key also locks and unlocks the cab
doors.
Lighting Controls
Unless otherwise noted below, press the upper half
of the switch to turn the desired light(s) on or off.
Exterior Lighting Controls
Exterior light controls are listed here in alphabetical
order.