Wiper Motor : The windshield wiper systems on a car, truck, van or suv require a wiper motor. The wiper motor is an electric motor that drives the windshield wipers movement. The wiper motor usually will contain a multi speed motor and sensors to detect a parked position. The wiper motor is attached to a wiper transmission or wiper linkage to push and pull the wiper arms for cleaning or wiping water off the car’s glass. Diagnosing a wiper motor requires general knowledge of how the particular wiper motor is wired to the vehicle. Wiper motor problems may include no wiper operation, a wiper speed not working, the wipers not able to find the parked position or wipers going very slowly.