I recently got a used 99 a4. The power locks werent working on it so figured i would deal with it until the weather got better to take a look, but now it seems to have rained and my alarm went crazy. THe car cant really tell when the doors are closed or not, im guessing a sensor issue, my rear door light stays on, when i lock up the car it stays on for a while, then goes off, but will trip the alarm. Im sorry if the way i wrote it seems a bit confusing, just had the alarm going off every few min. all day so i had to disconnect the battery. Any ideas what it could be? thank you in advance for your help