Hello everyone, thanks for having me as part of this forum. I have a question about my 1995 30' Dutchman bumper pull campers DC converter. When I bought the camper it did not have a 12 volt battery on it. I didn't install one because I thought that was just for when you didn't have it plugged into 110. We have been living in it for 3 months on 15 acres of land we bought. Now when I am running some lights and the furnace the converter starts "buzzing" and the lights go dim. I also noticed now that the cooling fan on the converter is not running like it used to. I put a box fan in front of it and that helps but it still buzzes when to much draw is on it, which doesn't take much to do. There are two little whit boxes in the converter that look kind of like relays on a car. They seem to be the source of the buzzing. I priced a new converter from Camping World and it is $275 and they don't have one in stock. Im afraid that my camper is going to catch on fire or something. Can anyone tell me what is causing this and how to fix it?