Reverse Gear Input
The rear wiper also operates if reverse gear is selected and the front wipers are on. If the front wipers are operating continuously when reverse is selected, the rear wiper will also operate continuously as long as reverse gear is engaged. If the front wipers are operating intermittently when reverse is engaged, the rear wiper will complete one wipe cycle then wipe intermittently.
On vehicles fitted with rain/light sensor, when reverse gear is selected while the front wipers are in intermittent mode but the rain/light sensor indicates that the front wipers are off, the rear wiper will not operate. If the rain/light sensor subsequently calls for a single wipe, the rear wiper will operate a single wipe cycle. If the rain/light sensor calls for a slow or fast wipe, the rear wiper will operate continuously.
The CJB will operate the rear wiper (providing the front wipers are on) upon receipt of a reverse gear signal from the TCM (transmission control module) on the CAN bus, via the instrument cluster. On vehicles with manual transmission, the gear position signal is transmitted directly from the transfer box control module and picked by the CJB as a CAN bus message, via the instrument cluster.