operators_manual

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.
Secondary Ignition Switch
The driver kick panel has been updated to
include a secondary ignition switch for
service use.
It is located on the left side for all
configurations except on right hand drive
vehicles.
Exterior Lighting Self-T
est
(ELST)
The Exterior Lighting Self-Test (ELST)
allows the operator to examine all exterior
lights as part of a pre-trip inspection. An
ELST can be activated via the dash switch
or the key fob. A full ELST can only be
activated with the ignition switch in the ON
position; otherwise, a limited ELST is
performed.
The ELST will run for fifteen minutes.
Exterior light functionality can be verified
by watching the lights from outside the
vehicle and by reading the instrument
cluster for displayed faults. The operator
may interrupt the test by turning the vehicle
off or activating the switch a second time
while the test is running. The ELST will
also start the system check (Systems
Check on page 26).
Full ELST
When a full ELST is activated, it will
alternately turn on and then off the
following lights:
CONTROLS - Ignition Key Switch
Y53-6096-1C1 (09/20) 77
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