Ford Mid-Size Cars 1971-1985 Repair Guide

Fuel System Inertia Switch


See Figure 1

In the event of a collision, the electrical contacts in the inertia switch open and the fuel pump automatically shuts off. The fuel pump will shut off even if the engine does not stop running. The engine, however, will stop a few seconds after the fuel pump stops. It is not possible to restart the engine until the inertia switch is manually reset. The switch is located in the luggage compartment on the left hinge support on passenger vehicles or on the left side storage compartment on station wagon models. To reset, depress both buttons on the switch at the same time. Some applications have only one button on the switch assembly.

Do not reset the inertia switch until the complete fuel system has been inspected for leaks.

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Fig. Fig. 1: Inertia switch location