I thought I only had the anti-theft system, the chip in the key. The only way I can stop the horn from blowing is to put the key in the ignition and turn it to the on position or disconnect the battery.
Sorry - That didn't come from Ford, somebody has added an extra alarm. But, because inserting the key stops it, the added alarm has be piggy-backed onto the factory PATS ( chip in the key ) system. I think you should find a pro, someone who installs alarms, have him find it remove it. The tricky part is the PATS anti-theft module is right on top of the engine computer - one wrong wire cut the car is dead.
