Car fuses are small safety devices found in a vehicle's electrical system. They protect various components, such as the radio, headlights, and power windows, from electrical overloads. When too much current flows through a circuit, the fuse melts and breaks the connection, preventing damage to the electrical parts. Fuses come in different types and ratings, which determine their capacity to handle electrical current. Common types include blade fuses and glass tube fuses. To maintain a vehicle's electrical system, it's important to check and replace blown fuses as needed, ensuring all components function properly.