Does anyone know why there is a soldered green wire on the back of my wiper switch. Ive fot an 81z with a delay wiper sys. I put a new wiper/washer motor in about 2 years ago got it working never got the actual delay or the washer pump to work i just got hi/lo and thats it. When i plug the washer in the wipers dont shut off and the pump keeps squirting. I kind of gave up on it im thinking about just hooking the washer up to a seperate switch. A 1981 wiring diagram would help alot. I cant seem to find where that soldered green wire comes into play.