Running the cable is very easy on the ram. Start at he drivers batter, drop down by the booster to the frame. Run along the frame the length of the vehicle, at the rear axle hump, you will see a group of cables that go up and over the hump so just follow them. At the rear, I went slightly over and back of the hitch to allow a little extra in case I needed to do a repair. At the rear of the truck, I drilled a hole on the left side of the license plate matching the factory trailer plug location. Originally this was for a second plug but recently I upgraded to Anderson 175A connectors. Just buy them or save a few bucks for the knock-offs.
I did the wire run originally on a 2004 Ram, pulled the wire and moved it over to my 2015 Ram. Ran #2 thick strand because it's what I had with the benefit of less cable ties because it doesn't flex easily. Would be much easier with something that did.
