Thanks for all the replies. We still haven't found it...but since we are plugged into shore power we're using a trouble light hooked into a 120v receptacle for lighting. The only draw on the house batteries right now is the fridge (which I have on propane). We were out today so this is our first opportunity to check email. Everything is fine for now although house batteries are a little low. I'm running the engine for 1/2 an hour every 8-10 hours to charge them up. Will get into this in detail tomorrow when we get home and have proper light etc. Will update everyone on what we find. Thanks...