Wiper Arm Linkage - Description

DESCRIPTION





The wiper linkage module is secured by a rubber insulated mounting tab and two screws through two rubber grommet-type insulators to the cowl plenum panel. The module is concealed beneath the molded plastic cowl plenum cover/grille panel between the base of the windshield and the rear edge of the hood panel. The ends of the pivot shafts that protrude through openings in the cowl plenum cover/grille panel to drive the wiper arms and blades 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 consists of two long tubular steel main members (1) that are each crimped at their outboard ends to a die cast pivot bracket (3) to which the two wiper pivots are secured. A die cast center motor bracket (4) is secured by crimps at the inboard ends of the tubular main members to provide both a mounting point for the wiper motor and a center support for mounting the wiper linkage module to the cowl plenum panel.
- Crank Arm - The wiper motor crank arm is a stamped steel unit with a hole on the driven end that is secured to the finely splined wiper motor output shaft with a nut, and has a long ball stud secured to the drive end to accept the wiper linkage.
- Linkage - Two tubular steel drive links (2) connect the wiper motor crank arm to the wiper pivot lever arms. The right side drive link has a plastic socket-type bushing on each end. The left side drive link has a plastic socket-type bushing on one end, and a plastic sleeve-type bushing on the other end. The socket-type bushing on one end of each drive link is snap-fit over the ball stud on the lever arm of its respective pivot. The left side drive link sleeve-type bushing end is then fit over the motor crank arm ball stud, and the other socket-type bushing of the right side drive link is snap-fit over the exposed end of the wiper motor crank arm ball stud.
- Motor - The wiper motor (5) features a transmission housing from which the wiper motor output shaft exits, and has three mounting bosses with internal threads to which the motor is mounted to the center wiper linkage module bracket with screws. 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. A short pigtail wire and connector connect the wiper motor to the vehicle electrical system through a dedicated take out and connector of the left headlamp and dash wire harness.
- Pivots - The two wiper pivots (6) are secured within the die cast pivot brackets on the outboard ends of the wiper linkage module main members. The lever arms that extend from the center of the pivot shafts each have a ball stud on their end. The upper end of each pivot shaft where the wiper arms will be fastened each has a finely splined and tapered driver with a threaded stud extending from the top. The lower ends of the pivot shafts are installed through permanently lubricated bushings in the pivot brackets.

The wiper linkage module cannot be adjusted or repaired. The wiper motor is available for separate service replacement. If any other component of the linkage module is ineffective or damaged, the entire wiper linkage module unit must be replaced.