2002 Dodge Neon, suddenly the horn was working. Went to press on it and got nothing. Then slammed my fist into it a couple times and it worked. Woke up this morning to the horn blaring. What would cause it to randomly blare like that?

It is probably trying to pay you back for slamming your fist into it....You have to be nice to cars sometimes to get them to cooperate...You know, pet them on the end of the hood and tell them what good cars they are? :)

Anyway, your problem is most likely being caused by a bad clockspring assembly in the steering column. This can also cause your airbag warning lamp to come on. If the airbag light is on, this is almost guaranteed to be the problem. A cracked circuit strip inside a clockspring assembly can expand and contract with temperature changes and cause things to short out. If the clockspring is not the problem then the airbagassembly could be shorting internally. I wouldn't recommend beating it with your fist anymore unless you want the airbag to deploy in your face.