I have a '03 Lancer ES and recently my left rear parking/brake light quit working. I thought it was the bulb but come to find out there is no power back there and when you press the brake the front left parking light comes on. I have never messed with any wiring on this car other than audio. Any suggestions on what it could be

 

What do you mean by no power? Did you try another bulb or you just measured the voltage going to the rear brake light connector?

 

There isn't any power going to the tail/brake light and I found out that when I press the brake the front parking light comes on.