Whenever it rains, and i lock my car and set the security system on, the alarm goes off after about 3 seconds and i have to go out and shut it off, and it will do this over and over. What could the problem be? I have a system with an optima yellow top, Alpine V12 4 channel amp and V12 mono amp, Alpine 10" type R, all infinity reference component speakers, a monster 1 farad cap, and a pioneer head unit.

 

Sounds like the shock sensor is set too sensitive. Behind the plastic mounted on the fender well on the back passenger side(spare tire well) is the shock sensor. It has a sensitivity dial. Give it a few turns.