Been having a problem with blown fuses in the inverter in our 2010 Dutchman Colorado 5th wheeel. When hooking up to the battery there is always a spark and one fuse blows. Replaced the fuse but it continues to happen each time we reconnect to the battery even when all appliances and electronics are off. (there is a little blue light that remains lit on the stereo at all times.)
When the fuse is blown one of the lights on the prong end of the shore power cord also goes out.
Any ideas what could be causing this problem? I think there is something drawing power but I can't figure out what it could be.