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

You selected the correct answers. A tail light that is not working can be caused by a faulty fuse or a defective bulb. Fuses protect the electrical circuit; if the fuse related to the tail light blows, the light will not function. The most common cause is a burned-out bulb, which must be replaced. The main beam switch does not affect the tail lights, so that answer is incorrect and not needed for this question. Knowing these two common causes helps you quickly identify and fix simple lighting problems on your vehicle.