First of all, we understand the working principle. The wiper motor is driven by the motor. The rotary motion of the motor is converted into the reciprocating motion of the scraper arm through the linkage mechanism, thereby realizing the wiper action. Generally, the motor is turned on, and the wiper can be operated. By selecting the high speed low speed gear, the current of the motor can be changed to control the motor speed and thus the scraper arm speed.
1. Confirm the connection mode and specifications of the wiper motor. The struts are connected to the wiper rocker arm, and some of the arms are fixed to the rocker arm by screws, and some are locked by the male buckle.
2. Whether the rubber strip of the wiper motor is aging. Pull the wiper motor up and use your fingers to touch the cleaned rubber wiper strip. If the blade ages, hardens, or cracks, the wiper motor fails.
3. Whether the wiper motor maintains a certain speed at different speeds. Place the wiper motor switch at various speed positions, especially if the wiper motor maintains a certain speed during intermittent operation.