Ignition Key Switch - Peterbilt 579 Operator's Manual

ACCESSORIES

Ignition Key Switch

The ignition key switch (located to the
left of the steering column) has four
positions: ACC (Accessories), OFF,
ON, and START.
3
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:
3-96
•
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.
Y53-6047–2C
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. For
complete engine starting procedures,
see Operating The Engine on page
4-5.
(04/13)