Why do my alarm keeps triggering?

Don't know that this is your problem, but I had a similar issue and it turned out to be related to the battery. It was several years ago, so I don't remember if the battery was dying or if it had to do with grounding (I had both problems at diff times), but once the battery issue was taken care of, the alarm and flashing lights issues were resolved.

I have a problem with alarm when I leave anything electronic turned on on the vehicle. If the iPod has WiFi on, the alarm goes crazy. Cellphone turned on and so on. But a bad Battery might lead to alarm malfunction.