Rick don't know if you have had a tech look at your coach yet, but I concur with Lee. I have the same problem with my 06 Patriot, particularly if the coach sets for a while. The valve will not open electrically and the light will not come on. When I open the valve manually, which with mine is quite easy, the light comes on. I believe the light is tied to the opening and closing of the valve and is not tied to the operation of the switch. When we are using the coach, the electric switches work basically 100% for both the black and gray. It is only when it sets for a few months, that the valves may stick, usually the black. In my case, if the valve sticks I manually open it and then I am good to go until it sets again. Not worth paying for a repair.