How can I fix the electrical system in my Audi 80?

I recently bought a used Audi 80 and I noticed that the electrical system is not functioning properly. The dashboard lights flicker and some of the power windows have trouble going up and down. How can I diagnose and fix these issues?

First, you should check the battery connections and make sure they are clean and secure. Loose connections can cause electrical issues in your car.

If the issue is not with the battery, it's possible that there is a faulty fuse. Use a fuse tester to check each fuse and replace any that are blown.

Another common cause of electrical problems in Audi 80s is a faulty alternator. You can test the alternator by using a multimeter and checking the voltage while the car is running.