How do I troubleshoot a faulty alternator in my Audi 80?

I have noticed that my Audi 80's battery is constantly draining and I suspect that it may be due to a faulty alternator. What steps should I take to diagnose and fix this issue?

The first thing you should do is check the voltage of your battery using a multimeter. If it reads around 12V or lower, then your alternator is likely not charging the battery properly. You can also check for any signs of damage or corrosion on the alternator itself.

You can also try jump starting your car and see if the battery holds a charge. If it does, then the problem is most likely with the alternator. If the battery still drains quickly even after being jump started, then there may be other underlying issues.