1. Common signs of a damaged windshield wiper motor include abnormal noise, uneven operation, and even short circuits or open circuits in the motor coils, possibly accompanied by a burning smell. The method for determining if a wiper motor is damaged is relatively straightforward. After starting the car, try opening the hood. If the motor is intact, you will clearly hear it operating.
2. The working condition of the wipers is also an important indicator of motor damage. If the wipers cannot move, move significantly slower and more unstablely, or make abnormal noises, these could all be signs of motor damage.
3. Another obvious sign is that if the windshield wipers only spray water but cannot swing normally, the washer motor is likely faulty. In this case, the corresponding relay needs to be replaced.
4. Judging whether the wiper motor is damaged by sound is also effective. With the vehicle powered on, operate the wiper switch. If the motor does not make the expected working sound, it may be damaged.
5. Similar to the previous description, if the windshield wipers only spray water but cannot swing, you can try opening the hood and operating the wipers. If the motor is working properly, you will hear a clear motor turning sound.
6. In addition, if the windshield wipers are not functioning properly, it may also be due to a blockage in the hoses. Especially when driving on unpaved roads, tiny dust particles may enter the spray nozzles and cause blockages, thus affecting the wipers' spraying function.