Who knows what has been chopped up and rewired, even under the engine shroud, so use a OHM meter to test the output of the wires coming down out of the shroud and use the chart StarTech posted in #5 to know what wires goes where.So are you saying a wire with a diode needs to go from the red wire to the battery?
There is a black and red wire coming from the stator. If it was cut on purpose because of overcharging, does that mean it should be charging without them connected?That looks like wires coming from the charging stator. That model has 3 different stators but, that looks like the Dual Circuit stator. It has DC volts going to the battery to charge it and has AC volts going to the headlights. They are notorious for over charging the battery though, that's why someone has disconnected the red wire, going to the battery....to try to keep from overcharging it.
I have one of these dual circuit stators at the shop, i'll be back at the shop Monday and I'll look at it and see what color wires are where.It has never been rewired. Not sure how that happened. Only one red wire.
There is a black and red wire coming from the stator. If it was cut on purpose because of overcharging, does that mean it should be charging without them connected?