What is a inertia switch

Asked by monkeyuncle Nov 21, 2019 at 07:50 PM about the 1999 Ford Ranger XLT Extended Cab Stepside SB

Question type: Maintenance & Repair

What is a inertia switch

1 Answer
157,635

James answered 5 years ago

The inertia switch shuts down the fuel pump in the event of very hard braking, like in a panic stop, or in the event of a collision. This is a safety device so that if fuel is leaking as a result of a crash the risk of a fire is lessened because the fuel pump is shut off immediately. Instead of it possibly continuing to run and pumping gasoline all over the ground. Hope that helps! Jim

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