Motorcycle Repair: break lights/ turn siginals, harly davidson, test light

Question
01 harly davidson road king classic
I installed halogyn tail lights and a run/turn/stop module. Everything worked well, I then changed fenders reinstalled and now both tail lights works but the left turn and stop functions do not work. It also seams that this light seams to be brighter when the tail lights are on.  

Answer
What you need to do is take a 12 volt test light and trach out the wires. Start with the turn signal bulb. See if there is any power there and work your way back to the harness connection. Do the same with the brake light. Start at the bulb and work your way back until you find the break.
Good luck and happy riding
Mike