HIGH VOLTAGE!
I love the sound of high voltage crackling! Got your attention eh? Except in house wiring where color codes are strictly adhered to by licensed electricians, boat wire color is mostly by whim of the installer. If you have experience in wiring, tracing the green wire is a no brainer because you can use a multimeter to trace wires. However, if you only have a limited understanding of wiring I can offer a few suggestions: 1)leave the green wire disconnected, attach your battery and turn on all you switches. If everything works "ferget about it". Otherwise, what does not light up or work may be the clue you need to identify the wire. 2)if after turning on all your circuits and SEVERAL or all circuits do not work, then possibly the green wire is a return (or ground, or common, all the same) to the negative side of the battery. I relocated and rewired the fuse panel of my Cat 22 but I forgot what all the colors were, in any event they did not seem to make sense to me at the time. However, if I recall correctly, BLACK was used as the common or return or negative side of the circuit (ie battery negative). If you have fused everyting, don't be affraid to experiment (fuses are cheap). If you can supply more clues, I could be of more help.
