Rear Window Wiper

On receiving a request for rear window wiper operation the CJB will energize the rear wiper relay. When energized, the relay provides a feed to the rear window wiper motor. The rear window wiper operates intermittently with a variable delay - regarding road speed and sensitivity dial position. The CJB controls operation of the relay, and consequently rear window wiper motor operation, accordingly.

The CJB also provides a feed to the rear window wiper motor park switch. The park switch is integral with the rear window wiper motor and ensures the wiper returns to the park position if the rear wiper request is cancelled mid-stroke. The park switch contacts are open when the rear wiper is in any position except the park position. This allows the CJB to return the rear wiper to the park position when the relay is de-energized.

The CJB will also power the rear window wiper motor if reverse gear is selected while the windshield wiper function is active. On vehicles fitted with an automatic transmission, the reverse gear signal originates in the TCM (transmission control module). The TCM broadcasts a reverse gear signal over the high speed CAN bus to the CJB, which responds by operating the rear wiper.