From what my husband says, the switches are working. As I said, everything was working just fine this morning. He started the coach up just to run the engine like he does every week...and suddenly we had no 12 volt. He has a battery charger on, trying to go around the 12 volt. I think he checked all fuses. But when daylight breaks we will try again. It's very cold and maybe the cold got to something. For now we have the 110 space heaters and flashlights. I can't thank you all enough for brain storming with us.