Hello, I own a 28 ft O'day. It is the 1979 model. Last year my 12 volt light in the saloon worked. This year not so much. I tried a volt meter and got a reading around 11 or 12 volts. Next I cleaned up the connections and hooked the light back up. Being that it is 12 volts there are two wires one black and one white. Okay here is another wire going to my chain plate. I think but do not know why so I did not reattach it. This light was not working..when it is altogether and I put the meter to it I get no reading? I tried to pull the wires to put a messenger on them and they do not budge. Because of the construction, are they in a track between the core? They do not budge?? . Yes I have hooked the lamp up to a 12 volt battery direct and it lights.