Will a new car horn work without a relay?

A new car horn can work without a relay if it is directly connected to the power source and the switch that activates it can handle the current. However, using a relay is often recommended because it can better manage the higher current required by the horn, reducing the risk of overheating and ensuring more reliable operation. Without a relay, the switch may wear out more quickly due to higher loads. Ultimately, while it can work, using a relay is a safer and more efficient option.