I just went to get my bike inspected and apparently my running tail light is out. But both of the brake lights are still working. The guy that inspected it said something about them both being double filament bulbs so it's possible that one of the filaments burnt out but I find it hard to believe that one filament in both of the bulbs burned out. Has anyone had the same problem or have any advice? Thanks.

 

The easiest advice, is to check the bulbs. The start checking the wires that control the taillight. There obviously is a good ground or the brake lights wouldn't work.