It prevents fuel from pumping after an accident occurs.
The heart pumps blood around your body. Without blood, your body parts cannot get the fuel they need - oxygen and food. The heart has to keep pumping so that all of your body is supplied with fuel. If your heart stops pumping, your blood stops flowing and you will die as your body parts run out of nutrients and oxygen.
When the old one becomes noisy, weak, or stops pumping fuel altogether. Assuming the fuel filter is not clogged, the fuel pump fuse is not blown, and the fuel pump relay is good.
even though it sounds like it is pumping it may not be, try a new pump and new fuel filter
When it's not pumping fuel.
A fuel pump inertia switch is designed to shut off the fuel pump when your vehicle is involved in an accident so fuel doesn't keep pumping creating a fire hazard. If it fails in such a way that it cuts off your fuel pump constantly your vehicle will not start. If it fails in such a way that the inertia sensor doesn't work you are at a higher risk of having a fire in your vehicle in involved in an accident.
look in the trunk for a reset button,when the car is bumped in the rear the switch stops the fuel in case of an accident
IT CAN BE A FUSE. OR IT CAN BE THAT THE PUMP IS NOT PUMPING FUEL
If you're getting power to the pump this proves the fuel pump fuse and fuel pump relay are good. That leaves only two possibilities. Either the pump is running but it's not pumping fuel. Or possibly the fuel filter is clogged.
The intertia switch is designed to kill the power to the fuel pump in the event of an accident in case a fuel line is ruptured in order to keep from pumping fuel all over the site. Sometimes inadvertently someone accidently kicks the switch or otherwise manages to trip it and it then has to be reset.
If its not pumping.
95 Saturn was in accident and where is the fuel restart button