SEARCH  Electrical Circuits, Switches  Coolant Temperature        Senders  Digital Transmission Range        Sensors  Headlight Switch Assemblies  Ignition Cylinder Assemblies  Ignition Switch Assemblies  Multifunction Switch        Assemblies  Oil Pressure Senders  Starter Relays  Transmission Range        Sensors  Turn Signal/Hazard Warning        Light Relays  Wiper Control Modules Ignition Switch Assemblies Motorcraft® Ignition Switch Assemblies: Are designed to meet Ford Motor Company requirements for key operating efforts and electrical performance Are designed specifically to work with the electronic systems in Ford, Lincoln and Mercury vehicles Are durability tested to 88,000 cycles Why an Ignition Switch Assembly May Fail Use of worn keys or improperly cut keys may damage the tumblers Trying to pull the key from the cylinder before the vehicle transmission has been placed in "Park" may also damage the tumblers Steering column damage may also damage the cylinder or its connections to the starter circuit A typical symptom would be fully inserting the correct key into the cylinder and turning it, but the engine will not crank and/or accessories remain inoperative Related Components to Check Starter motor Starter solenoid Ignition coil and cable to distributor Breaker points Engine timing Spark plugs and spark plug wires Search all Motorcraft® ignition switch assemblies, product numbers and descriptions in the Full-Line Catalog.