Originally Posted by putertopia
Could this have to do with the fact that the top stud on the tail light is snapped and needs epoxied?
Yes. Those studs provide the clamping force to make the seal between the lens and the body. Remove the lens from the car, make sure you have a good seal, repair the stud, then pull the lens up evenly but not too tightly with the nuts on the studs. I use 3M strip caulk to re-seal when I can, because it allows disassembly when necessary, but seals very well.
Here is THE definitive thread on water leaks: http://www.bonnevilleclub.com/forum/...ic.php?t=29366