Probably a bad door switch on the lock cylinder. Either get a remote and progmram it or fitx the door switch.cspoonmore said:My security system won't shut off. My remote hasn't worked for awhile. The funny thing is I open the door this morning and nothing happen, but when I open the door this afternoon the alarm went off. I tried starting the car to see if that would shut the alarm off, but my car wouldn't start. I thought the battery might be bad so I try to jump the car and nothing happen. I'm wondering if the alarm has some kind of kill switch I need to reset. You would think by using my own key I would be able to disable my alarm. After awhile the alarm shuts off, but as soon as I open the door it comes back on. I would appreciate any insight one might have.