Converter, Furnace, Or Batteries
Got our 2009 28' Flying Cloud out of winter storage today and was testing systems. The trailer is plugged into AC power. Had the halogen lights on in the trailer and turned the furnace thermostat up enough to start it up. When the furnace fan started, the lights noticeably dimmed. The gas/burner firing and cutting off had nothing to do with it. I have a plug in analog AC voltage meter and the AC voltage to the trailer is fine.
Don't know if this is relevant; but, the batteries are starting their 5th season. Running the furnace was immediately knocking the DC voltage down to 12.4 volts and the batteries seemed fine running the power jack up and down earlier today.
Should be obvious by now that I'm electrically challenged and feel sure someone can give the me "order of business" to start isolating my problem. Thoughts and ideas will be appreciated.