I am an alarm pro girl. You have to find the metal box that has the connections in it, NOT the keypad with the buttons on it, ok. Then you open the metal box. Inside on the bottom there will be a big battery. you undo the red battery lead on it. It will not shock you, it is only 12 volts. Leave the black battery lead on because i don't want you accidentally touching the red and black leads off of that together or it will make a spark and scare you. Next read along the screws inside until you see the two screws that say AC or 12 Volt. This is the power. Now follow the wires from under those two screws until you find the plug in the wall. Its a big fat plug. Unplug that plug and your security system will have no power whatsoever.
If you want the security system to be functional, you will have to get a professional such as myself to come to your home and program it the way you want it. Good Luck.
goddess of alarm systems