Wrangler 2WD V6-3.8L (2008)
Wiper Motor: Description and Operation
Wiper Module
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 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 (3) 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, and a stamped motor mounting plate near the center. The front wiper module bracket is secured within
the cowl plenum by two screws through a rubber insulator (1) in each pivot bracket. A knob-like rubber insulator (8) on a locator stud integral to
the bottom of the motor mounting plate is engaged in a slot in the forward wall of the cowl plenum.
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Crank Arm - The front wiper motor crank arm (6) is a stamped steel unit with a hole on the driven end that is secured to the wiper motor output
shaft with a nut. A ball stud secured to the drive end of the crank arm engages the bushings of the two drive links.
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Linkage - Two stamped steel drive links (5) 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 to the motor mounting plate of the wiper module bracket by the motor transmission housing with
three screws. 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 (4) are secured to the ends of the wiper module bracket. The lever arms that extend from the bottom of the
pivot shafts each have a ball stud that engages a drive link bushing. A shield on the top of each pivot has a lug (2) that engages a pocket on the
underside of the wiper arm pivot end to maintain proper wiper blade alignment. The upper end of each pivot shaft where the wiper arms will be
fastened is tapered and serrated with a threaded stud formation at the tip.
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.
Operation
OPERATION
The front wiper module operation is controlled by the battery current inputs received by the wiper motor through the Totally Integrated Power Module
