How to troubleshoot a malfunctioning turn signal in an Audi 80?

My turn signals seem to be malfunctioning on my Audi 80. They work sporadically, and sometimes not at all. I've checked the bulbs, but they seem to be fine. What could be the issue?

First, try checking the fuse for the turn signals. If it is blown, replace it with a new one.

You may also want to check the relay for the turn signals. It could be faulty and need to be replaced.

Sometimes, dirt and debris can build up in the connections for the turn signal bulbs, causing them to fail. Try cleaning them out and see if that improves the function of your turn signals.