Peterbilt 579 - Page 138

SWITCHES
3
39. Lights, Marker/Clearance/Cab
Turn
switch on to control Cab
Marker/Clearance lights separately
from the trailer.
40. Lights,
Marker/Clearance/Trailer
Turn
switch on to control
Trailer Marker/Clearance lights
separately from the vehicle
marker/clearance lights.
41. Lights, Park
Light
Turn
switch on for Park Lights. When
the Park Lights are on the dash lights,
side and tail lights are also on.
42. Lights, Spot
Turn
switch on for Spot Light.
43. Mud and
Snow Traction Control
Momentarily push
switch in to engage
Traction Control (TC).
44. Pintle Hook
Turn
switch on to remove the slack
from the Tow Hook.
45. Power Take-off (PTO)
Turn
switch on to engage PTO.
Your vehicle may be equipped with
a dash mounted switch that controls
PTO engagement/disengagement.
When the operator activates the
switch for the PTO, the status
indicator lamp (located on the
switch) will immediately illuminate
even though PTO engagement
may not have occurred.
If the PTO is engaged and the
operator turns the switch OFF, the
PTO status indicator lamp (located
on the switch) will go out immediately
even though PTO disengagement
may not have occurred.
NOTE
Actual PTO engagement/ disengage-
ment may be delayed momentarily
since it is controlled by the air system
and mechanical movement.
CAUTION
Increasing engine RPM before the
PTO is actually engaged could pre
-
vent the PTO from engaging and/or
cause PTO damage.
46. Power Take-off (PTO), Forward
Turn
switch on to engage
Forward PTO.
47. Power Take-off
(PTO), Rear
Turn
switch on to engage Rear PTO.
48. Suspension, Axle,
Pusher
Turn
switch on to lower Single or
Forward Pusher Axle. This switch
does not require ignition power to
maintain the desired switch setting.
49. Suspension, Axle, Tag
Turn
switch on to lower Tag Axle. This
switch does not require ignition power
to maintain the desired switch setting.
3-66 Y53-6047–2C (04/13)