Inertia Fuel Shutoff (Ifs) Switch

1. 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 (IFS) SWITCH LOCATION table.
   INERTIA FUEL SHUTOFF (IFS) SWITCH LOCATION
   
   

   Application	Location
   All	In Trunk On Left Hinge Support Or Behind Trim Panel

2. 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 appropriate article in the ENGINE PERFORMANCE section:
   • WIRING DIAGRAMS - Continental
   • WIRING DIAGRAMS - 4.6L - Cougar & Thunderbird
   • WIRING DIAGRAMS - Town Car
   • WIRING DIAGRAMS - 4.6L - Crown Victoria & Grand Marquis

Continuity should not exists. Reset switch and ensure continuity exists between appropriate terminals.