Hello 3200..............First welcome to the website!...........Where do you boat out of in St. Joseph? The only reason I ask is that we bought our 2001 3000 from the old Maxum/Bayliner dealer in Benton Harbor. Just down the road from Pier 33 right next to the BoatUS store. I believe it is a condo complex now?
When we first started looking for our "new" boat 6 years ago, the admiral and I really enjoyed coming up to St Joseph/Benton Harbor area to look our bigger boat. Still can remember the survey run out on Lake Michigan with the fog in March.
To answer your question I would say you have something mixed up in the wiring with your lights and alarm system. A good electrican could probably run it down for you.
I am trying to think where else a beep would come from.......
Roger