Well I am feeling stupid...... The switch is in the WET BAY. It is not labeled and is just above the black tank flush inlet. I was thinking that black rocker switch was for the water pump or something.
So clearly the light is intended to make it easier to set up or take down in the dark. Seems like a feature more coaches should have. Iíve had to set up after dark and in the rain and it wasnít a lot of fun. Light would have helped!