How can I troubleshoot a bad starter on my Audi 80?

I'm having trouble starting my Audi 80 and I suspect it's due to a bad starter. What steps should I take to diagnose and fix the issue?

First, try jumping the battery to see if that resolves the issue. If the problem persists, test the starter solenoid to see if it's receiving power. If not, check the starter relay and fuse for any problems.

One potential cause of a bad starter on an Audi 80 is a damaged or worn out ignition switch. Check the switch for any signs of damage or wear and consider replacing it if necessary.

Another possible cause of a bad starter on an Audi 80 is a faulty starter motor. Use a multimeter to test for continuity and resistance in the motor and replace if needed.