my right blinker is flashing faster than normal. But it's not constant. It blinks normal speed then fast then normal. I've replaced all front blinkers and checked back one(LED). They all work and it continues to blink fast then normal repeatedly. I even unplugged the negative cable from the battery and waited 30 sec. Still no fix. Please help!

 

I'm no mechanic but wonder if it could be the LED in the back? Try putting in a regular bulb and see if that cures the problem. I might just be that with the LED not drawing enough juice the truck might think it's burned out. I know on mine with a burned out bulb it blinks fast. Just my thought.

 

Check the sockets for the bulbs. Look for corrosion or loose connections. A loose ground will also cause your problem.

 

Well I never got around the checking the sockets and wiring but it just started working normal this afternoon. All day it hasn't blinked rapidly. Thanks for the replies and suggestions from the community!