If you find out that you need to replace your converter, (you can take some measurements to see if it is putting out DC - which I did to confirm my OEM was shot) - Highly recommend the Progressive Dynamics version that comes with a charge wizard (I believe that is what its called). It plugs into the converter and there is a green LED that flashes (I ran mine into my fuse bank, which is located in the front of my main cabin, floor level under my entertainment center). Depending on the flash rate, I know what my converter is doing to the batteries. I love it.
Good Luck.
