How do reset the security system for a Ford 2001 Explorer Sport Trac?

To reset the security system on a 2001 Ford Explorer Sport Trac, first ensure that you have the correct key for the vehicle. 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 stops flashing, then turn the key off and back to "On" again. This process can be repeated up to three times if necessary to fully reset the system.