At night when i have my lights on the taillights light up fine. But whenever i hit the brake the one corner light on the driver side goes out while the rest brighten. Whats the deal?

 

Bump

 

One of the filaments is blown (The one that goes on when you hit the brakes). Go get a new bulb.....

 

Like headlights, taillights have dual filiment bulbs to have two brightness settings. I would first check the bulbs to see if one of the filiments is burned. After that I would check the wiring and finally check the controller, though I have no idea what it is called haha