I have a 1962 evinrude selectric on a 1960 crestliner. I have no reverse gear. In testing I have discovered there is no power coming across the reverse (green) wire anywhere in the wiring scheme. I traced it all the way back to the electrical box but I can not see where the green wire connects to power. The forward (blue) cable has power everywhere. Any wiring schemes out there or suggestions. The electrical box on these old boats are cramped and not much room to work.