How do I diagnose and fix electrical issues in my Audi 80?

I've been experiencing strange electrical problems in my Audi 80, such as flickering lights and intermittent power loss. What steps should I take to diagnose and fix these issues?

First, check the battery connections to ensure they are clean and snug. Then, use a multimeter to test the battery voltage and see if it needs to be charged or replaced.

Next, check all fuses and replace any that are blown. This can often be the cause of strange electrical issues.