Hello, I have a 2003 GS Ultra Supreme that the running lights stopped working. Head lights, turn signals work on the motorhome and connected trailer. I have checked every fuse for continuity inside the the fuse box by the drivers left foot and they are good. I did the same with the power distribution box inside the engine bay. They are all good. What else can I look at? Could it be the headlight switch assembly( I don't think so because the headlights work)