Black Widow Car Alarm

I'm trying to hook up a black widow x5 car alarmi in my 93 4door cavalier. I'm just wondering, now... Are my door locks negative pulse? Because the alarm uses the negative pulse. I currently have a command start hooked in and it has the door lock button and it works. (I didn't hook it up myself.) So yea, i'm just wondering if the locks run off the negative pulse. thanks alot.