I need some direction on where to next troubleshoot my tailights not working.

Some history:
-Been having issues with tailights over that last few years.
-Replaced tailight and mid wiring harnesses about a year ago and things seemed better.
-Last summer I had to have my odometer worked on which required pulling the dash and ever since I got the truck back the tailights don't work?
-This past winter I rewired 95% of the truck (main harness, engine bay (both sides), front headlights, front signal, dash, steering column, heater, new ignition switch, Hi/low switch, flasher, brake switch, and new headlight switch.
*I was very careful to make sure the harness I was replacing matched the color and position of wires from old harness.*

Problem:
-I still don't have tailights...but I do have the license plate light which is part of the same harness (brown wire) which should power the tailights but don't?
-No brakelights...other than if I leave the white and orange wires on the switch they glow real dim?
-Front head lights work fine both hi/low.
-Front parking lights work fine...only have license plate light in rear.
-Turnsignal left front blinker ok...but both rear lights & license flash dim. On right both front lights blink dim and both rear blink real dim along with license light.
-With parking lights on and turnsignal I don't get any flash right or left.

Do I have a ground problem or a new harness that isn't wired correctly?

I'd appreciate any help!!!



1964 Chevy C20