Linkage, Wiper Arm: Description
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The wiper linkage 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 wiper linkage module.
The wiper linkage module consists of the following major components:
- Bracket - The wiper linkage module bracket (2) consists of two tubular members that extend from opposite sides of a die cast center section that serves as the wiper motor mount. Each tubular member has a die cast pivot bracket formation secured at the outboard end where the wiper pivots are secured. The wiper linkage module bracket is secured within the cowl plenum by two screws through two rubber insulators (1).
- Crank Arm - The 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.
- Linkage - A stamped steel drive link (5) connects the wiper motor crank arm to the left wiper pivot lever arm. A stamped steel connector link (4) connects the left wiper pivot lever arm to the right wiper pivot lever arm. Each link has a plastic socket-type bushing on each end. The bushing on the pivot end of each link is snap-fit over a ball stud on the crank arm or the pivot lever arm.
- Motor - The wiper motor (3) is secured by a bracket integral to the motor transmission housing with two screws and nuts near the center of the wiper linkage module bracket. A knob-like rubber insulator (6) on a stud integral to the motor transmission housing is engaged in a slot in a stamped bracket on the cowl plenum panel. The two-speed permanent magnet wiper motor features an integral transmission, an internal park switch and an internal automatic resetting circuit breaker. An integral connector receptacle connects the motor to the vehicle electrical system.
- Pivots - The two front wiper pivots (7) are secured to the ends of the wiper module bracket. The lever arm that extends from the lower end of the left pivot shaft has two ball studs that are engaged with the bushings of the drive and connector links. The lever arm of the right pivot shaft has a single ball stud that is engaged with the bushing of the connector link. 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 wiper motor and crank arm unit is available for separate service replacement. Any other component of the wiper linkage module cannot be adjusted or repaired. If any component of the module other than the motor is ineffective or damaged, the entire wiper linkage module unit must be replaced.