When I did my rewire I tied into the main feed from the hitch (12GA) and used home run wiring with 14GA to the wheels and then tied the 14 GA into the magnet wires. Seperate clean grounds installed at each brake (other side of magnet wire)-used 14GA. My amps nearly doubled from 2.6 to 3 before rewire to 4.5 to 5.5 after rewire(all readings at idle) I also tucked all wires up under the belly panel where it is dry-wires I removed from inside the axles were wet. I have not had a chance to take it out on the road yet. I would get rid of the light weight wire you have. I did not want to nick the wires or remove hubs(since i used heat shrink connectors) to check voltage-I am sure it is fine with the jump in amps-good luck!
