Inertia Switch Test

In event of a collision, electrical contacts in inertia switch open and fuel pump automatically shuts off. Fuel pump will shut off even if engine does not stop running. The engine, however, will stop a few seconds after fuel pump stops. It is not possible to restart engine until inertia switch is manually reset.

On Aerostar (2.3L engine), Bronco II, F-Series and Ranger, inertia switch is located on toe-board to right of transmission hump. On Aerostar (3.0L engine), switch is located in engine compartment. On E-Series, the switch is on passenger side cowl panel, just forward of right front door. To reset inertia switch, depress button on top of switch. See Figure , Figure and Figure .