Liberty 4WD V6-3.7L (2009)
Wiper Motor Linkage: Description and Operation
Wiper Arm Linkage - Description
DESCRIPTION
The front wiper module is secured within the cowl plenum panel beneath the cowl plenum cover/grille panel. The ends of the wiper pivot shafts (3)
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 consists of a long tubular steel main member that has a die cast pivot bracket formation near each end
where the two wiper pivots are secured. A die cast mounting bracket for the wiper motor (4) is secured with two screws near the center of the main
member. Each of the two wiper pivot brackets secures the module to the cowl plenum with a screw through a rubber insulator (1), and a third
rubber insulator on the motor bracket secures the module with a nut to a stud located in the bottom of the cowl plenum.
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Crank Arm (6) - The front wiper motor crank arm is a stamped steel unit with a 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.
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Linkage (2) - Two tubular steel drive links connect the wiper motor crank arm to the wiper pivot lever arms. The right side drive link has a plastic
socket-type bushing on each end. The left side drive link has a plastic socket-type bushing on one end, and a plastic sleeve-type bushing on the
other end. The socket-type bushing on one end of each drive link is snap-fit over the ball stud on the lever arm of its respective pivot. The left side
drive link sleeve-type bushing end is then fit over the motor crank arm ball stud, and the other socket-type bushing of the right side drive link is
snap-fit over the exposed end of the wiper motor crank arm ball stud.
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Motor - The front wiper motor is secured with two screws near the center of the main tubular member of the wiper module bracket, and through a
rubber insulator to a stud in the bottom of the cowl plenum. An integral connector receptacle (5) connects the motor to the vehicle electrical
system through a take out and connector of the front end module wire harness. 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.
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Pivots - The two front wiper pivots are secured within the die cast pivot brackets on the outboard ends of the wiper module main member. The
lever arms that extend from the center of the pivot shafts each have a ball stud on their end. 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 lower ends of the pivot shafts are installed through
lubricated bushings in the pivot brackets and are secured with snap rings.
The front wiper module cannot be adjusted or repaired. If any component of the module is ineffective or damaged, the entire front wiper module unit
must be replaced.
