Battery dies when car is off for 16+ hours.

I have a 1988 Prelude with 188K miles. Recently the red light on the dashboard that reads 'door/seatbelt', is on all the time along with the constant beeping like the door is open; even when I'm driving. I was able to break the speaker so the sound stopped but my new problem is that when my car sits, not running, for more than 16-20 hours the battery dies. It seems to me that the car thinks the door is always open and the red light flashing and sound going off is wearing the battery down when the car is not running! This all started at the same time so it makes sense that it's related. My question: how can I disconnect or rig that connection between the door and frame or re-wire something to stop this constant pull on the battery? Where is the connection point on the door that isn't connecting now? Thanks