[Daryles]

Start with cleaning the contacts in the 7 way cable and the truck bed receptacle. I used #200 sand paper and "Deoxit". Roll up the sand paper to get into the female contacts.
Then a little dielectric grease on the contacts.
Open the pin box junction box and squeeze down on all the wire nuts.
Some people have found the wire going through the axle tube has Chaffed. They cut it off and spliced on wires on the outside of the tube and zip tied them on.