How do I turn off theft from my pickup that stops my engine from turning on? on 2000 Ford Ranger

My pickup had alarm and I lost the remote so I paid for the alarm to be removed but now that I try to turn it on the theft light blinks rapidly and the car does not turn on....oh my windshield has a stickers that says prestige alarm system

1 answer 3 comments
Needs to be diagnosed, The Pats system is not part of the after market alarm, it's ford's anti theft system.
Was removing my alarm a bad thing?
No I have to do it all the time, the PATS is different, it's built with the truck. Usually it's the sender from the ignition switch to the pats module.
How do you disconnect the Theft device? I would like to use standard keys.