I have an 06 Boulevard M50 and bought a set of turn signals. I changed the rear ones out with no problems. Now I can't figure out how to get the fronts out to put the new ones on. I have the headlight taken apart to access the wires and there's 3 wires for each turn signal, the rear signals only consisted of 2 wires... Please help me somebody!!!

 

The front will have one black and one black and white and one gray .The gray splices to orange, then black to black,then black white to black white black white being the ground this is front left for the front right black/to bluish. green then gray to orange the black white to black white

 

Front ones have three wires because two are used by the relay for blinking function and the other wire keeps the lights always on as drive lights. The rear had two wires because those are blinkers only and don't have an always ON feature.
If your aftermarket lights have only two wires, then they will only work as blinkers and won't stay on like the originals..... that is if you wire them correctly. I believe you want them to function as blinkers, and not drive lights.