Linkage, Wiper Arm: Description: Description
The front wiper linkage module is secured by three screws through three rubber grommet-type insulators to two brackets and weld nuts on the cowl plenum panel and one bracket and weld nut on the driver side strut tower. 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 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 linkage module. The front wiper linkage module consists of the following major components:
- Bracket - The front wiper module bracket 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. A stamped steel mounting bracket for the wiper motor is secured near the center of the main member. Each of the two wiper pivot brackets secures the module to the cowl plenum with a screw through a rubber insulator (4), and a third rubber insulator on the motor bracket secures the module with a screw in the bracket on the driver side strut tower.
- 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, and has a long ball stud secured to the drive end to accept the wiper linkage.
- Linkage - Two stamped steel drive links (3) 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 front wiper motor (1) 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. is secured with three screws near the center of the main tubular member of the wiper module bracket. 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 (5) connect the wiper motor to the vehicle electrical system through a dedicated take out and connector of the headlamp and dash wire harness.
- Pivots - The two front wiper pivots (2) are secured within the die cast pivot brackets on the outboard ends of the wiper linkage module main member. 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 fine splines on a 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 front 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.