What is the fuel pump shut off switch?

The fuel pump shut-off switch is a safety device designed to quickly and completely cut off the flow of fuel to the engine. This prevents fuel from reaching the engine in the event of a crash or other emergency, thus significantly reducing the risk of fire. It's typically located in a variety of places depending on the vehicle's make and model, but is often found under the hood or sometimes inside the cabin, often near the driver's side. It's usually a manually operated switch.