Re: 1972 Chris Craft Lights
Are you just replaceing the old light bulbs for new ones, or the old fixtures for whole new fixture?
If you are replaceing the fixtures it might be a good idea to run all new wire and have it all new.
Basicly, grab a 12v test light. I would expect to see 2 wires to each light, one directly to the battery and one through a switch. Test every wire every conection, at the fuse, or fuse block, switch, socket. teh wired should NOT be cracked or brittle, the conections shoudl be water tight so water can not get easily in check each side of the fuse and switch.
If you are just replaceing the light bulbs check the socket, cleanish, not mucked up or too much scale rust. In the socket there is a fibre disc on it there are 2 dull metal pads, they need to be clean and proud of the surface of the dissc. Under the disc there should be a spring it too need to in gooos shape. The disc needs to move to allow enough presure between the metal pads and the light bulb.
Are the lights wired in series or parellel? to check with the lights on if you remove one bulb from the circuit does the other stay on or go off. If if goes out they are wired in series and you need to change that , if it stays on it is wired in parallel and that is waht you want.
Good luck