I had the same problem a year ago on my 2016 ACE 30.1. My friends followed us to the Tennessee mountains. When we arrived they said "your left tail light isn't working". During inspection I found all the screws so ruste thy had no threads. The entire compartment was wet and full of bull ants. The other light was the same way. I repaired the wood the best that I could and replaced both with LEDs. They are so much brighter. Whether the old lights weep or not has nothing to do with the fact that the outside of them weren't properly sealed.
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