WARNING: DO NOT reset IFS switch until fuel system has been inspected for leaks and repaired if necessary.

If IFS switch is tripped, engine cannot be restarted until switch is manually reset. To reset IFS switch, depress switch button. For IFS switch location, see INERTIA FUEL SHUTOFF SWITCH LOCATIONS table.
To test IFS switch, turn ignition off. Remove IFS switch. Shake IFS switch to force it into tripped position (switch open). Check continuity between appropriate IFS switch terminals. See ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL. Continuity should not exist. Reset switch and ensure continuity exists between appropriate terminals.

INERTIA FUEL SHUTOFF SWITCH LOCATIONS

Application	Location
Crown Victoria, Grand Marquis, Marauder & Town Car	Left Front Side Of Luggage Compartment, Behind Lining
Focus	Bottom Of Right "A" Pillar
LS	Behind Left Kick Panel
Mustang	In Left Rear Of Luggage Compartment
Sable & Taurus	In Right Side Of Luggage Compartment, Behind Side Panel
Thunderbird	In Left Side Front Footwell
ZX2	Bottom Of Left "A" Pillar

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Inertia Fuel Shutoff Switch