Navistar ProStar+, Operation And Maintenance Manual

Page: 101 / 304

Controls / Features
17 FIFTH WHEEL JAW
UNLOCK
Press and hold this
momentary switch to
unlock the fifth wheel jaw.
Vehicle must be stationary,
parking brake set, and
ignition switch in the RUN
position.
5TH WHEEL JAW
MONITORING LOCK /
UNLOCK
These switches activate
an electronic jaw lock
indicator system showing
fifth wheel jaw status to the
operator.
18 DIFF / LOCK
Used when vehicle has
single locking differential
for improved traction
on poor surfaces at low
speeds.
DIFF FR AXLE / LOCK
Locks forward rear
drive axle differential
when vehicle has 6x4
independent locking
differentials for improved
traction on poor surfaces
at low speeds.
19 DIFF RR AXLE / LOCK
Locks rear drive axle
differential when vehicle
has 6x4 independent
locking differentials for
improved traction on poor
surfaces at low speeds.
20 PARKD REGEN / ON
DPF regeneration
activation when parked
switch is used for engine
aftertreatment. Manually
initiates DPF regeneration.
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