Last week on my way home from work my front dash "dinged". I thought it was time again to get gas, but I was wrong. It was time to change my driver's side rear brake light. The "ding" was my Jeep's way of letting me know the bulb was out. It even flashed on my dash telling my the rear left brake light is out. This is my first "fix" on my 2015 Jeep Wrangler Rubicon. What I find interesting is this was my first "fix" on my 2014 Sahara too. Am I doing something wrong? Or is this normal? Did I use too much blinker fluid or not enough? :D
Replacing your own bulbs is pretty simple and takes about five minutes. However, if you have any sort of head light cover make sure you are careful when removing the four screws. There are spacers that could fall off and bounce onto your garage floor. I forgot about them and spent another ten minutes looking for them after two had bounced around on my garage floor. 
Before you put it all back together I suggest you test it out to make sure the blinker and brake lights work.
Easy Peasy!