Don't forget to check the 2nd ground connection, where the ground wire going to the converter connects to the frame. I upgraded my wiring a few years ago, going from an AWG #8 positive wire to an AWG #2 wire. Also added bigger ground wires, both locations, and made damn sure the ground connections to the frame were tight and clean. I sprayed the connections with a couple coats of black paint to help seal the frame connections from the elements.
I also checked (and tightened if necessary) all connections on the converter. Several were a little loose.
2011 Dodge Ram 1500 HEMI Quad Cab
2011 Jay Flight 26BH