Stacey,
From your Profile, do you still have the 2011 Majestic? I'm going out on a limb here second guessing. On my 2018 Majestic, most of the LED lights were dark in one of my tail light units. Again, on the 2018 Majestics, the tail lights were 2008-09 Dodge Ram tail lights. Take a look on Amazon:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Now, if that is what they look like, to remove/replace is a real finger-getter! Both hands, get your fingers into the light assembly seam on the outside edge, pull inward flexing the light unit, and out. Fun! Now, before you order anything, do remove one light units and see if it has two or three wires (do not count the reverse light wire) leading to the light controller unit on the back of the assembly. If it is two wire, it is the above unit for replacement. If it is 3 wire, then the replacement is the 2002-06 Dodge Ram light assembly:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
To replace the light assembly, push the inside prongs into the assembly grommets, then place your palms on the outside of the light assembly, push it inward to flex the assembly and into the outside assembly grommets. Yes, it is a total pain, but it does work.
Again, I am assuming that your 2011 uses the same type of light units as my 2018. There are no hidden screws. It is literally causing the light to flex to put the "stabs" into the assembly grommets. I used waterproof crimping butt splicers from Home Depot to connect the wiring to the new light assemblies.
I'm not sure about the light bar. Is that the unit in the center of the rear cap? You might call Mike at New Horizons. He is the manager of the Warranty/Repair department. He could probably tell you what the replacement for that light bar is.
Just my two cents,
Ron