Wrangler L4-2.4L VIN 1 (2006)
Wiper Motor Linkage: Description and Operation
FRONT WIPER MODULE
Fig. 17 Front Wiper Module
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. The driver ends of the wiper pivot shafts that protrude
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 following major components:
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Bracket - The front wiper module bracket 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. 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.
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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.
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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 bushing 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.
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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.
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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
damaged, the entire front wiper module unit must be replaced. The front wiper motor and boot are available for service replacement as a unit only.
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
harness. 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
alternately 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
