I know that if you hit the door lock button while the door is open, that it sets the "alarm" and making the red dot on the dash flash. By that Im sure it is a blowing horn if someone what.....tries to open the door, or drive off or what? Also, if it is "set" this way, how do you disengage it if your horn does start blowing? By starting the Jeep??? thanks......

 

I think what you're looking for is in the owners manual;

Jeep Alarm Doc .pdf