I came up with a few threads about this problem. I had installed a LED light bar for the tailgate wired into the brake and turn signals directly for the past 6 months now with zero problems. I just installed a set of LED mud flaps and they have been working good for the last week with the exception of just the mud flaps to be a constant brake on. Now i got the indicator light and lostmy rear left blinker and I yanked one of the left turns and it appears to be working now. Would both sets of LEDs create enough resistance to where it would tell the computer that the bulb was about to go bad or could the bulb be going bad period?

 

I would try the bulb first... but I could agree with all the extra draw creating a problem and causing the light.