A hello and an introduction always starts a conversation...
Question - If it's not the bulb it could be any of the connectors or wires (condensation is quite normal in these lights, but all depends on how much water is there? As it shouldn't be in the back near the electrics, more so in the front of the lens)
Best option is long winded and you will need to take the bumper off and remove the failed light to plug into the working side - this will help you pin point the issue
PS welcome to the forum...
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