I have had water pooling under passenger side bench seat on my trillium
1977 4500. I was planning on resealing windows
and doing a belly band job and will still be doing those jobs.
I actually found my leak today when we were getting a torrential downpour. So much water was getting into my taillight it filled it to the point the water was coming into the trailer through the drilled hole for the taillight wires.
Anybody else ever had that happen?