An automotive relay wiring diagram is an essential tool for anyone working on a car’s electrical system. In its simplest form, an automotive relay is an electrically operated switch. It allows a low-current circuit to control a high-current circuit. This is crucial because many components in a vehicle, like headlights, fuel pumps, and horns, require a significant amount of power. Directly wiring a switch to these high-power components could overload the switch and create a safety hazard. The relay acts as an intermediary, protecting the switch and the wiring.
