2008 Ford F250 Owner Guide 4th Printing - Page 160

Locks and Security Automatic arming The vehicle is armed immediately after switching the ignition to the 1 (OFF/LOCK) position. Automatic disarming Switching the ignition to the 3 (ON) position with a coded key disarms the vehicle. Replacement keys If your keys are lost or stolen and you don't have an extra coded key, you will need to have your vehicle towed to an authorized dealer. The key codes need to be erased from your vehicle and new coded keys will need to be programmed. Replacing coded keys can be very costly. Store an extra programmed key away from the vehicle in a safe place to help prevent any inconveniences. Please visit an authorized dealer to purchase additional spare or replacement keys. Programming spare keys A maximum of eight keys can be coded to your vehicle. Only SecuriLock™ keys can be used. To program a coded key yourself, you will need two previously programmed coded keys (keys that already operate your vehicle's engine) and the new unprogrammed key(s) readily accessible for timely implementation of each step in the procedure. If two previously programmed coded keys are not available, you must bring your vehicle to your authorized dealer to have the spare coded key(s) programmed. Please read and understand the entire procedure before you begin. 160 2008 F-250/350/450/550 (f23) Owners Guide (post-2002-fmt) USA (fus)