Front Wiper Module Description; Operation - Chrysler Vehicle User Manual

8R - 16 FRONT WIPERS/WASHERS
FRONT WIPER MODULE
DESCRIPTION
Fig. 17 Front Wiper Module
1 - SCREW (3)
2 - MODULE BRACKET
3 - WIRE HARNESS CONNECTOR
4 - WIPER MOTOR
The front wiper module is secured with three
screws, one each at the motor bracket and the two
pivot brackets through rubber insulators to the cowl
top panel and concealed within the cowl plenum area
beneath the cowl plenum cover/grille panel (Fig. 17).
The driver ends of the wiper pivot shafts that pro-
trude through dedicated openings in the cowl plenum
cover/grille panel to drive the wiper arms and blades
are the only visible components of the front wiper
module. The front wiper module consists of the fol-
lowing major components:
• Bracket - The front wiper module bracket con-
sists of a long tubular steel main member that has a
stamped pivot bracket formation near each end
where the two wiper pivots are secured. A stamped
steel mounting plate for the wiper motor is secured
with welds near the center of the main member. The
bracket includes metal-sleeved rubber isolators at
each of the three bracket mounting points.
• Crank Arm - The front wiper motor crank arm
is a stamped steel unit with a slotted hole on the
driven end that is secured to the wiper motor output
shaft with a nut, and has a ball stud secured to the
drive end.
• Linkage - The two front wiper linkage members
are each constructed of stamped steel. A connecting
link with a plastic socket-type bushing in each end is
fit over the pivot ball studs to join the two pivots.
The wiper drive link has a plastic socket-type bush-
ing on each end. One end of the drive link is snap-fit
over a second ball stud on the passenger side pivot
crank arm, while the other end is snap-fit over the
ball stud on the wiper motor crank arm.
• Motor - The front wiper motor is secured with
three screws to the motor mounting plate near the
center of the wiper module bracket and is protected
by a rubber boot. The wiper motor output shaft
passes through a hole in the module bracket, where a
nut secures the wiper motor crank arm to the motor
output shaft. The two-speed permanent magnet
wiper motor features an integral transmission, an
internal park switch, and an internal automatic
resetting circuit breaker.
• Pivots - The two front wiper pivots are secured
to the ends of the wiper module bracket. A crank arm
extends from the lower end of each pivot shaft. The
driver side pivot crank arm has a single ball stud
secured to it, while the passenger side crank arm has
two ball studs. The upper end of each pivot shaft
where the wiper arms will be fastened each has an
externally serrated drum-like driver secured to it.
The front wiper module for this model is serviced
only as a complete unit. If any linkage component or
the mounting bracket of the module is faulty or dam-
aged, the entire front wiper module unit must be
replaced. The front wiper motor and boot are avail-
able for service replacement as a unit only.

OPERATION

The front wiper module operation is controlled by
the battery current inputs received by the wiper
motor through the right multi-function switch on the
steering column. The wiper motor is connected to the
vehicle electrical system through a dedicated take
out and wire harness connector of the body wire har-
ness. The wiper motor speed is controlled by current
flow to either the low speed or the high speed set of
brushes. The park switch is a single pole, single
throw, momentary switch within the wiper motor
that is mechanically actuated by the wiper motor
transmission components. The park switch alter-
nately closes the wiper park switch sense circuit to
ground or to battery current, depending upon the
position of the wipers on the glass. This feature
allows the motor to complete its current wipe cycle
after the wiper system has been turned Off, and to
park the wiper blades in the lowest portion of the
wipe pattern. The automatic resetting circuit breaker
protects the motor from overloads. The wiper motor
crank arm, the two wiper linkage members, and the
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