Hasn't anyone had a problem with the horn and alarm going off without a reason? My horn and alarm are not connected and this has been happening in the middle of the night.

 

Is it an aftermarket alarm or an oem alarm? I know that my aftermarket alarm has a vibration sensor on it, and for some reason, when I work on the suspension or have the car jacked up under a wheel or something, the alarm will go off. It doesn't do it once I turn it own though, it just does it at random times. Wierd.