I just bought a boat, the first i've had in about 15 years. I'm not very mechanically inclined but I think I can change a light bulb on the trailer. My right bulb is bad it got wet there is water in the plastic housing. The housing looks sealed and the wires are sealed to it. Do I have to by a new houing with bulbs, and rewire, and seal it? Is there any way to get inside of the housing to replace the bulb?