How can I fix the constant windshield wiper not working issue on my Audi 80?

My Audi 80's windshield wipers won't turn off even when the switch is turned off. They also won't stop at the correct position when turned off. What could be the problem and how can I fix it?

It is possible that the wiper control module is faulty or damaged. You may need to replace it to fix the issue. Check for any visible damage or consult a professional mechanic for further troubleshooting.

Sometimes, the issue can be caused by a malfunctioning wiper motor. You can try cleaning the motor contacts and connections to see if it helps. If not, consider replacing the motor.

One possible cause of this issue could be a faulty wiper switch. Try testing the switch's continuity with a multimeter to determine if it needs to be replaced.