Valentino Navarrete

I have a 2002 mustang GT with the 4.6liter, I'm having problems with the green with red stripe alternator wire.. The battery lights does show on my dash and my car won't charge.. For some reason the yellow with white stripe wire work and the main power wire work.. The only wire that don't work is the green with red stripe wire.. Here and there it will show little power but not much... Plz help