Rear Window Wiper-Washer System

Rear Window Wiper-Washer System

General Description

The A Carline rear window wiper-washer system has a one-speed, 12 volt DC permanent magnet (PM) motor. The motor drives a gear box which in turn drives a wiper pivot that provides an oscillating output to the arms and blades.

The unit is mounted to the vehicle with one (1) screw and one (1) dowel pin through grommets. The third mounting point is at the pivot utilizing a nut on the outer portion of sheet metal on the tailgate.

Washer System

Fig 1: Rear Window Wiper:

Fig 2: Rear Wiper-Washer Circuit Diagram:

Fig 3: Wiper Blade Removal and Installation:

Fig 4: Rear Wiper Motor and Container Mounting:

Depressing the "Wash" button completes the washer motor's electrical circuit to ground, energizing the motor and operating the pump. The pump operates only while the "Wash" button is pressed.

The washer pump is mounted in the engine compartment with the washer jar.

System Operation

Fig 2: Rear Wiper-Washer Circuit Diagram:

The system operates only with the ignition in the "Run" or "Accessory" position, but will park if the ignition is turned off. There are three electrical terminals on the motor.

Terminals A, B, and C are utilized when the motor is in the Run mode where A and C are (+) and B is ground.

When the wiper switch is turned to Off, only terminals A and B are used with A being (+) and the circuit being completed through the closed park switch terminals. A cam on the gear then opens at Park position and the wiper shuts off.

Autopark Module

Fig 1: Rear Window Wiper:

The Autopark Module is serviceable part. The function of the Autopark Module is to supply voltage to the wiper motor if the ignition is turned off while the motor is in operation. This allows the wiper motor and arm to return to the park position.