Linkage, Wiper Arm: Description
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 a long tubular steel main member that has a die cast pivot bracket formation near each end where the two wiper pivots are secured. The wiper linkage module bracket is secured within the cowl plenum by two screws through two rubber insulators (5).
- Crank Arm - The 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 long double ball stud secured to the drive end.
- Linkage - Two stamped steel drive links (4) 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.
- Motor - The wiper motor (1) 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 (5) on a stud integral to the motor transmission housing is engaged into a slot in a stamped metal bracket. 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 (3) are secured to the ends of the wiper module bracket. The lever arms that extend from the bottom of the pivot shafts each have ball studs that engage the bushings of the drive links. 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.