How do y ou reset 04 Ford Mustang pats?

To reset the PATS (Passive Anti-Theft System) on a 2004 Ford Mustang, you'll need to use the ignition key. Insert the key into the ignition and turn it to the "On" position without starting the car. Leave it in this position for about 10 minutes until the security light on the dashboard turns off. After that, turn the key off and try starting the vehicle. If you have lost all keys, you may need professional assistance to reset the system.