Check out this thread
http://www.trailmanorowners.com/foru...ead.php?t=1925
My 2002 TM started doing this just before we traded it in. This is NOT a good situation, since the door swings open when you slow down. I had visions of slowing down to enter a construction zone, and having the door swing open just in time to catch a signpost - or, God forbid, a construction worker in the head.
The problem seems to happen because the foam weatherstrip that lines the door opening gets permanently compressed. I replaced the foam, but probably with something too soft, since the problem didn't fully go away.
I don't like the idea of duct tape or drilling holes for outboard latches. And tightening the latch screw didn't do anything for it. There was at least one good idea in the thread I mentioned. I think it involved replacing the latch turnbutton with a larger one, like the one inside that holds the door halves together. But whatever you do, you need to do it pronto.
Bill