How do you reset the anti-theft device in a 2003 Windstar?

To reset the anti-theft device in a 2003 Ford Windstar, first ensure that the vehicle is unlocked. Insert the key into the ignition and turn it to the "On" position without starting the engine. Wait for about 10 minutes until the security light on the dashboard turns off, then turn the key back to the "Off" position and repeat this process two more times. After the third cycle, you should be able to start the vehicle normally.