Terminal 53 supplies power for the first speed of the cleaner.
Terminal 53a supplies power to reset the wiper blades to their original position, power is supplied to the motor until the motor returns to its original position.
Terminal 53b supplies power for the second speed of the cleaner.
Through terminal 53e, the windshield wiper motor is braked when the brushes return to their original position after the windshield wiper is switched off, so that the brushes do not go beyond their original position.
Terminal 31 serves as ground contact.
Hint: When the ignition is on, the wiper blades should not be blocked beyond their initial position, for example by a thick layer of snow or ice. After all, terminal 53a is constantly under voltage in this case. The wiper motor cannot rotate due to blocked blades, after a certain time it burns out. You must remove the obstacle so that the blades can move.