Water in passenger side taillight lens.

[LSM360]

The water running down off the trunk lid and over the taillights makes them tough to seal. I finally ran a bead of RTV along the outside where the lens and housing meet trying to make it flush with the RTV. It's kind of a pain because RTV can make a mess but I just have some 70% alcohol and rags ready. This is how I finally completely sealed mine.

 

[dm330]

I bought another tube and did that earlier as well, as well as to the driver's side as a precaution. If it works, great, but if not, at least the holes will allow the water to drain.