operators_manual

unintentional adjustments to the
mirrors.
Ignition Key Switch
General information on the operation of the
ignition key switch.
The ignition key switch (located to the left
of the steering column) has four positions:
ACC (Accessories), OFF, ON, and START.
OFF:
In this position all accessories are OFF (except
those listed below) and you can remove the
key.
The following lights and accessories
have power when the key is in the
OFF position:
• brake lights
• emergency hazard flasher
• dome and courtesy lamps
(on doors)
• electric horn
• cigarette lighter
• tail lights
• marker lamps
• headlights
• radio station memory
• instrument lights
• auxiliary power
• instrument panel memory
settings
ACC
(Accessory):
With the key in this position you can
play the radio, defrost mirrors (if
equipped with mirror heat) or use
other accessories.
ON: In the ON position all circuits are
energized. Panel warning lights will
light and the buzzer will sound until
(1) the engine is started, (2) normal
oil operating pressure is reached, and
(3) air brake system pressure is
above 65 psi (441 kPa). In this
position, the ignition key cannot be
removed.
START:
Turn the key to this position to start
your engine. Release the key after
the engine has started.
Related concepts
What is the Exterior Lights
Self Test
This feature allows the operator to verify
and inspect exterior lighting operation
typically performed during a pre-trip
inspection.
When the feature is engaged, via a switch
on the dash, it will illuminate the:
• Park lights
• Side marker lights
• Hazard/turn signals
• Lo beam headlamps
• First set of fog/driving lights
The test will turn those lights off and then
illuminate the:
• Park lights
• Side marker lights
• Hi beam headlamps
• Stop/Brake lights
After turning these lights off, the system
will resume testing the first set of lights.
The light test will eventually stop on its
own. The operator may interrupt the test by
turning the vehicle off or pressing the
CONTROLS - Ignition Key Switch
Y53-6047-2HEN (03/18) 111
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