Today I fixed three broken inner taillight wires as per the TSB and now my inner taillight work perfectly; brake lights and all.
My advice would be for anyone with a 2015 or 2016 Genesis model is to check to see if the right side inner taillight harness has been relocated to prevent the wires from being too stressed and breaking. Either check yourself by pulling the trunk trim or have a dealership check it before the wires break. The car does not give a bulb out warning for the inner taillight if it is out. This repair job could be expensive out of warranty if a mechanic does the job, especially if the wires are broken.
My broken inner taillight wires.
Inner taillight wires repaired. I used aluminum foil to protect the good wires when I applied heat for the shrink wrap tubing. I relocated the wire harness as specified by the TSB and used cloth electrical tape to protect the harness from chaffing when the trunk lid moves.