disabling factory keyless entry?

why?

Sorry, took awhile to reply. I had to get all the details. I was trying to help a buddy out and what I grasped from the scenario is that all of the sudden his alarm left him stranded. His alarm key fob was damaged and he had to get the car towed. He disconnected his horn and I dont know how or any details on exactly what he did but he managed to bypass the starter kill. However, the reason he was trying to disconnect the alarm was because he says the alarm light stays on his dome light goes off and the horn is constatntly blowing. I also asked more questions and have come to the conclusion he has an aftermarket alarm not factory. So I'll get better informed on this particular vehicle cause I will probably be the one to install the new alarm he's gonna put in it. Thanks, for the reply and I apologize for my delayed response.