ok ive never heard of this but here it goes:
ok yesterday morning at 5:00am my car made every noise possible, the aftermarket alarm went off and wouldnt turn off, and the horn was constantly honking. i had to disconnect the battery to turn it off. so yesterday i disconected the aftermarket alarm and thought it would be good. But this morning at 5:00am the horn went off again so i disconected the fuse. Does anyone know what is happening?

 

Just a guess, but I'd be suspecting either crossed or shorting out wires. I'd check to see if any wires are exposed, pinched, etc.

 

ok thanks i will check the wires do you think it has anything to do with the VATs because it happend at the same time 2 mornings in a row? thanks

 

I'd suspect the aftermarket alarm long before i suspected VATs. From the factory it appears VATs is a purely passive system. If the key matches, your car starts, if it doesn't, your car stays dead. Unless the aftermarket alarm was somehow tied into VATs (I doubt it) its probably not the case.

I'm not an expert by any means on alarm wiring, but I believe that alarms are usually triggered when a circuit is being completed. I'd venture to theory that for some reason thi circuit is being completed inadvertently, causing the alarm to sound.