SO my brake lights don't work but my tail lights do, also the reverse lights and the turn signals don't work. After replacing all the bulbs, I am curious to know what the common link is with all of these.

I had the same problem with the drivers side brake lights, couldn't figure it out until I frogged the units ( swapped them ) and found that the problem was with the light assembly.

i had to replace the circuit boards in my tailights. check the harness with your test light. the defect is not visually obvious.