I just put all new lights on my trailer, and I have the same problem I had with the old wiring/light setup. As soon as I dip it into the water a bulb pops. They are submersible lights. I guess cause they are on pretty much the whole way down the ramp so they get hot, and then you dip them in water. Anyone else have this problem? The easy answer is to unplug before backing down the ramp, but I know I will forget to plug them back in.