Tail light problem

[jdvier]

Right rear tail light no power. Have checked wiring no power to socket. Cannot get to inside wires. Any idea where to go from here.

Thanks in advance
Jack
2012 3400RL- 2014 F250 King Ranch 6.7 powerstroke

[H. John Kohl]

I would go to the splice box up at the Pin and check all the wire nuts.
On second thought if left side is working and not the right especially for the running lights then bring a temporary ground and see if the right side lights work.
Good luck.

[BB_TX]

Does license plate light work? Both tail lights and the plate light should be wired together somehow. Standard trailer wiring is a brown wire from the power cord connector to the tail lights. And I would guess there is a wire across the back of the trailer connecting them together.
I would do as John suggested. Connect a wire to ground (frame) and again check power to the light socket using your meter from that wire to the lamp socket. And check power to the wire to the light socket, not just the socket contact. Could be a bad socket.
If no power is available at all to that light socket, then you might pull the other tail light and the license plate light and see if you can determine how they are jumpered together. Could be a loose/bad connection at one of the places where the wires are jumpered.
And again guessing, I would think each of the lights is grounded to the frame individually.