What does an inertia switch 1991 ford f150 do?
In a 1991 Ford F-150, the inertia switch is a safety device designed to cut off the fuel supply to the engine in the event of a significant impact, such as a collision. This helps prevent fires that could result from fuel leaking after a crash. It's essentially a simple switch that's activated by a sudden deceleration. After the impact, you have to manually reset it to restore fuel flow.