Alarm HELP!!!!
 

I sold my 91 rx7 FC to someone in my city, i didnt have the OG key for the car, it was like that when i bought it. she just called and said she plugged in the alarm under the dash and which i had not knowledge about, and now the car wont start and has the alarm light blinking. ive tried looking up how to disable it but nothing has been for this type of thing, she has tried unplugging the alram, unplugged battery and the fuses the car still wont turn over

Aftermarket? Should be some wires near the ignition switch that need to be swapped back to factory, maybe check the ECU for spliced wires.

FYI s5 alarm is built into the CPU.

The original key is not a chipped key. The alarm is activated after being armed and will trigger when either of the doors, hatch or hood are opened. It disables the starter and will honk the horn and flash the hazards and headlights for a brief period of time (4 to 6 mins)and then arm itself again. To disable it all you need to do is unlock one of the doors with the key. This will disarm the system. Doesnt matter if the key or original or if it had been cut out of an aftermarket blank. If the alarm is activated, the only way to deactivate it is by unlocking one of the doors or the hatch with the key. Using the key in the ignition switch will not turn the alarm off.