A fuel pump relay is an electrical switch that controls the power supply to the fuel pump. It is typically located in the engine compartment of a vehicle, and is activated when the ignition key is turned to the "ON" position. The relay sends power to the fuel pump, which then pumps fuel from the fuel tank to the engine.
Fuel pump relays can fail for a number of reasons, including electrical shorts, corrosion, and mechanical wear. When a fuel pump relay fails, it can cause the fuel pump to stop working, which can prevent the engine from starting.
If you suspect that your fuel pump relay may be faulty, you can test it by using a multimeter to check for continuity between the terminals. If there is no continuity, the relay is faulty and will need to be replaced.
