Car Alarm kept going off at all times day and night! Door open sensor would activate even though the doors were all closed and set off alarm. Eventually I was at work the other day and all of the alarms and interior lights and flashing exterior lights ran down the battery. Had to get it jump started to get home and then searched on the internet for a solution. Came across an article that said it is probably a bad battery as the low voltage will set off the alarm. Today I put in a new battery and so far it is staying quiet. Quite annoying for a few days until we got this figured out.