rear lights are a known problem area (this was the problem on my 33) to fix it just remove and reseal them, or if its not them the boot seal itself could have a split in it and the rear screens have been known to let water in at the bottom before now.
hope this helps
GTROC Area Rep-North West
Behold a white GTR, and the man who sat in it was Death and hell followed with him.
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Northwest mini meet and photoshoot, (date yet to be comfirmed)