Grand Caravan V6-3.3L VIN R (2005)
Wiper Switch: Description and Operation
Instrument Panel Center Bezel
On Automatic Temperature Control (ATC) vehicles only, the rear window wiper/washer switches are located on the center bezel with the hazard and
heated seat switches. They are not serviceable separately from the hazard and heated seat switches. If defective, the entire switch assembly must be
replaced.
Rear Wiper/Washer Switch Location
On Manual Temperature Control (MTC) vehicles only, the rear window wiper/washer switch is located on the HVAC control head attached to the center
bezel. They are not serviceable separately from the control head. If found faulty, the entire MTC head must be replaced.
When rear wiper operation is required, the BCM will provide ignition ON voltage to the rear wiper motor. When the wiper switch is turned OFF, the
BCM provides circuit ground to operate the motor until the wipe cycle is complete and the wiper arm returns to the base of the rear window.
The rear wiper/washer switch only offers an intermittent rear wiper mode. The wiper motor will cycle every 7 seconds. The intermittent delay time is
also adjusted based upon vehicle speed. With the vehicle traveling greater than 50 mph, the cycle changes to every 5 seconds.
When rear washer is requested by depressing and holding down the switch, the BCM then provides a ground for the rear washer motor. Until the switch
is released, the motor will be in a continuous wipe mode, then return to an intermittent wipe mode.
