Here is a picture of the route I took to wire my backup camera through the bed area.
Install of the backup camera required removal of the inside plastic on the lift-gate. Then, there is a metal cover that can be removed with a philips screwdriver. Once that is removed, you can see existing wiring for the lights.
Now there are three bolts that hold on the plastic trim on the outside of the lift gate. You need to loosen these bolts and pry off the plastic trim to snake the wiring for the backup camera. I didn’t remove it entirely, just enough to get my wire through.
Here is how I routed the wires inside the lift gate. (blue zip-ties)
I then loosened the plastic cover on the all along passengers side of the bed so I could pull it back enough to run my backup camera wire through.
When you get to the cabin, you’ll see existing wiring and that is where i also ran my wire through. There is a grommet between the bed and the cabin and I was able to force my backup camera wire through there.
Outside:
On the inside of the cabin, I had to remove the interior plastic on the rear-passenger side that covers where the seat-belt goes, along with the plastic trim that runs under the door. This enabled me to fish for the wire and feed it inside.
Inside:
From there, I ran the wire under the door trim plastic and have it come out under the passenger seat to the console. I then ran the wire under the console - into the console all the way up to the radio.