Linkage, Wiper Arm: Description
The front 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 front wiper linkage module.
The front wiper linkage module consists of the following components:
- Bracket - The front wiper linkage module bracket (1) consists of the unit that supports the wiper motor and transmission unit as well as the wiper pivot brackets at each end where the two wiper pivots are secured. The front wiper linkage module bracket is secured within the cowl plenum by two screws through two rubber insulators (2) and a knob-like rubber insulator support (3).
- Crank Arm - The front wiper motor crank arm (5) is a stamped steel unit with a serrated hole on the driven end that is secured to the wiper motor output shaft with a nut and a ball stud secured to the drive end.
- Linkage - Two stamped steel links (6) connect the wiper motor to the two wiper pivot lever arms (7). Both links have plastic socket-type bushings on each end. The bushings on the shorter drive link are snapped over the ball stud on the crank arm and the forward-facing ball stud nearest the center of the left pivot lever arm. The bushings on the longer connecting link are snapped over the rearward facing ball studs near the end of both pivot lever arms.
- Motor - The front wiper motor (4) is secured through three stanchions integral to the transmission housing to the linkage module bracket by three screws. 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 (8) are secured to the ends of the wiper module bracket. The lever arms that extend from the lower ends of each pivot shaft have ball studs that engage the bushings of the drive or connecting 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 front wiper motor and crank arm unit is available for separate service replacement. Any other component of the front wiper linkage module cannot be adjusted or repaired. If any component of the module other than the motor is ineffective or damaged, the entire front wiper linkage module unit must be replaced.