The tail light of your vehicle is not working. What could be the cause of this?

Your answer is correct. In German traffic rules, if the tail light is not working, the most common causes are either a defective bulb or a faulty fuse. The tail light relies on a properly functioning bulb to emit light and on the electrical system, protected by a fuse, to supply power. A defective bulb means the light source is broken and needs replacement. A faulty fuse means the electrical circuit is interrupted, preventing the tail light from receiving power. The main beam light switch does not control the tail light, so it is not a likely cause. Understanding these electrical components helps you quickly identify and fix lighting issues to maintain road safety.