I have a 2002 Fatboy with LED rear turn signals and the left rear one isn't working. I have checked the grounds and they all seem to be working. I unplugged the right turn signal from the circuit board thats inbehind the taillight and plugged it into the left side and still I get nothing. I thought it might be the circuit board going bad so I took one off of my buddy's bike and yep you guessed it... NOTHING!! The alarm system still works so its not that either. I have checked the wires back to where the connect under the seat and they seem to be ok but I haven't went any further than that yet. Even the left green turn signal arrow wont work at all. HELP PLEASE!!!!

 

Take it into the stealer and have them connect up to the Digital Technician diagnostic system. The DT can do it all... from diagnostics to reprograming your ECM.