1. When you turn the ignition switch to the "run" position, it sends power to the fuel pump relay.
2. The fuel pump relay is a switch that is controlled by the ignition switch. When the ignition switch is turned on, the relay closes and completes the circuit to the fuel pump.
3. The fuel pump is an electric motor that pumps fuel from the fuel tank to the carburetor or fuel injectors. When the fuel pump relay is closed, the fuel pump starts running and pumps fuel to the engine.
4. The fuel pump runs continuously while the engine is running. When you turn off the ignition switch, the relay opens and the fuel pump stops running.
This system ensures that the fuel pump only runs when the engine is running, which helps to prevent flooding and other fuel-related problems.
