alarm light

When I turn the key off, the alarm lamp flashes, and continues to flash for hours. I've only had the car for two months, do not have an owners manual and it has done this since I bought it. Any ideas on how to disconnect, turn it off, or reset it?

not sure bout resetting it and what not....but in the trunk on the left side is where the stock alarm plugs in....i did mine like 3 years go so i kinda forgot....but i know if i closed my passenger door last and locked the car, the alarm would go off in 30 seconds, whether i was out of the car in the car, or driving the car

anyon..in the car, near the fuel shut off switch....left side...there'll be two plugs....unplug one....if the car doesn't start, plug it back in and unplug the other. Can't remember what the other did, but i unplugged the wrong one first.

Thanks, I'll just unplug it.