Windshield Wiper Motor And Linkage Assembly

The windshield wiper motor and linkage assemblies differ between Right Hand Drive (RHD) and Left Hand Drive (LHD) models. The wiper linkage assembly and motor assembly are not serviceable individually.

The windshield wiper motor and linkage assembly is attached to the vehicle body with screws and washers at each end. The screws are located in rubber bushes in the wiper linkage assembly which isolate the assembly from the vehicle body. A rubber locating grommet is located behind the motor and engages on a spigot on the vehicle body to locate the linkage assembly.

The windshield wiper motor comprises a 12V DC (Direct Current) motor with integral gear wheel and worm drive attached to the wiper linkage with four screws.

The motor assembly is connected to the vehicle harness by a four pin electrical connector. The electrical connector provides two battery voltage feeds from the fast/slow wiper relay, located in the Engine Junction Box (EJB), a ground path for the motor assembly and a wiper park feed for the CJB.

The motor contains a park switch which is connected to the CJB. When the motor is switched off, the CJB detects the park switch opening and stops the windshield wiper motor in the park position.

If the windshield wipers or the linkage become obstructed, the CJB will remove power to the windscreen wiper motor if the park signal does not change state within 6 seconds. The wiper motor will remain disabled until the obstruction is cleared or an alternative active wiper mode is selected. Three disable events are allowed until a 180 second disable period is activated or until the next ignition cycle when the event counter will be reset to zero.

The windshield wiper motor and linkage assembly comprises a main tube with a pivot assembly located at each end. The motor assembly is attached to the tube by four screws. Two link rods are attached to the motor crank to provide the connection between the motor crank and the two pivot cranks.

The motor crank converts rotary motion from the motor output shaft into linear movement of the link rods. The cranks connected to each pivot, convert the linear motion of the link rods back to rotary motion of the pivots. This rotary motion is passed to the wiper arms and blades causing the blades to wipe a reciprocating arc on the windshield.