Patriot 2WD L4-2.4L (2009)
Wiper Gear Box: Description and Operation
Wiper Transmission - Description
DESCRIPTION
The front wiper module is secured to stamped brackets within the cowl plenum panel beneath the cowl plenum cover/grille panel. The ends of the wiper
pivot shafts protrude through dedicated openings in the cowl plenum cover/grille panel to drive the wiper arms and blades and are the only visible
components of the front wiper module.
The front wiper module consists of the following major components:
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Bracket - The front wiper module bracket (4) consists of a long tubular steel main member that has a stamped pivot bracket formation near each
end where the two wiper pivots are secured. The front wiper module bracket is secured within the cowl plenum by two screws through two rubber
insulators (6).
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Crank Arm - The front wiper motor crank arm (5) 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 a ball stud secured to the drive end.
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Linkage - Two stamped steel drive links (7) connect the wiper motor crank arm to the two wiper pivot lever arms. The passenger side link has a
plastic socket-type bushing on each end, while the driver side link has a socket-type bushing on the pivot end and a sleeve-type bushing on the
crank arm end. The bushing on the pivot end of each link is snap-fit over a ball stud on the pivot lever arm. The sleeve-type bushing on the driver
side link is snap fit over the inner ball formation of a double ball stud on the crank arm, then the socket-type bushing of the passenger side drive
link is snapped over the outer ball formation.
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Motor - The front wiper motor (9) is secured by a bracket (3) integral to the motor transmission housing with two screws and nuts near the center
of the wiper module bracket. A knob-like rubber insulator (8) on a stud integral to the motor transmission housing is engaged in a slot in a stamped
bracket on the forward wall of the cowl plenum. The two-speed permanent magnet wiper motor features an integral transmission, an internal park
switch, and an internal automatic resetting circuit breaker.
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Pivots - The two front wiper pivots (1) are secured to the ends of the wiper module bracket. The lever arms that extend from the bottom of the
pivot shafts each have ball studs that engage the bushings of the drive links. A molded plastic shield (2) is fit over the top of each pivot housing.
The upper end of each pivot shaft where the wiper arms will be fastened each is tapered and serrated with a threaded stud formation at the tip.
The front wiper motor and crank arm unit is available for separate service replacement. Any other component of the front wiper module cannot be
adjusted or repaired. If any component of the module other than the motor is ineffective or damaged, the entire front wiper module unit must be replaced.
