RAM 1500 Van V8-59L Wiper Motor Linkage: Description & Operation
Wiper Motor Linkage: Description and Operation
Fig. 18 Wiper Linkage
The wiper linkage and pivots are concealed within the cowl plenum area beneath the cowl plenum cover/grille panel. The 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
wiper module. The wiper module consists of the following major components:
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Linkage - The two wiper linkage members are each constructed of stamped steel. The connecting link has a plastic socket-type bushing in one end,
and a plastic sleeve-type bushing in the other end. The socket bushing is snap-fit over the ball stud on the passenger side pivot crank arm, while the
sleeve bushing is fit over the longer ball stud on the driver side pivot crank arm. The drive link has a plastic socket-type bushing on each end. One
end of this drive link is snap-fit over the exposed end of the longer ball stud on the driver side pivot crank arm and captures the sleeve bushing end
of the connecting link beneath it, while the other end is snap-fit over the ball stud on the wiper motor crank arm.
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Pivots - Both wiper pivot mounting flanges are secured with two screws each to the cowl top panel. The crank arms that extend from the bottom of
the pivot shafts each have a ball stud on their end. The ball stud on the driver side pivot crank arm is longer than the ball stud on the passenger
side. The upper end of each pivot shaft where the wiper arms will be fastened each has an externally serrated drum secured to it.
The wiper linkage cannot be adjusted or repaired. If any component of the linkage is faulty or damaged, the entire wiper linkage unit must be replaced.
The wiper linkage operation is controlled by the output of the wiper motor through the wiper motor crank arm. The wiper motor crank arm, the two
wiper linkage members, and the two wiper pivots mechanically convert the rotary output of the wiper motor to the back and forth wiping motion of the
wiper arms and blades on the glass.
