Right rear light system not working

[Solomon McMurray]

I own a 2007 GMC Sierra 2500 Hd Classic with aftermarket blacklight LED tail lights. Two weeks ago I backed into a tractor and cracked the cover on the right tail light. Since then, no lights have worked on it (not parking, signals, or reverse). Dug into it today and I find that all lights on the broken light still work when plugged into the left side and that nothing works when the good light is light is plugged into the right side. All fuses are fine. Where do I start now? Might it be the plugs themselves? Or do I have to retrace the whole wiring harness back to the fuse box?