About six months ago I noticed my running tail light and reverse light workout I change the bulbs and they were still out. Now every light is out including the brake light and the left turn signal. I am not sure where to start or how to diagnose this issue since it is not a bulb issue. I have checked all the fuses I can think of and none of them are broken.

 

How did you check the fuses? Looking at them alone is not a good check. You might also have bad connections and or bad grounds. You have to go through the wiring and check them all. Is it only the rear that is a problem?