--- In [email protected], Arthur Haan <pentwate...@...> wrote: > > > Cabin light fuse blew and a blew a second time with all lights off. > > 4 ohms from blue wire to neutral with the lights off? > > Wiring runs forward from the starboard panel (with a blue wire) to the > starboard light to v berth light through the anchor locker to the other v > berth light on the port side to the port side cabin light then aft to ??????
If you have 4 ohms with all the cabin lights switched off, then you have a short somewhere. You should read infinity with all the lights switched off (not by the electrical panel switch, but each individual light switch). You're right that Ohm's Law declares 12 volts divided by 4 ohms equals 3 amps, but I suspect you have a short that, when energized, drops well below 4 ohms due to resistance heating. Good luck!
