Rear Wiper and Washer
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The rear wiper and washer is controlled by the rear wash/wiper switch. The switch contains an internal module which activates the rear wiper and washer. When the rear wiper is selected a ground signal to the rear wiper motor causes the motor to activate. When the washer is selected the switch will send a ground signal to the rear washer pump causing it to operate also activating the rear wiper motor.