Check your dood pin switches. I had to replace my drivers side, cause sometimes my pin stuck and didn't turn on the domelights, but they can short out too. Also, depending on how the alarm was hooked up, the hatch pin can also trigger the alarm too if they tapped into the wire that catches both pins. maybe a faulty shock sensor?? After the alarm goes off, turn it off, then look at the red led, and count the number of flashes. I believe if the shock went off it should flash 2 times, and if a door pin, should flash 3 times. See what that does for ya...

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)