This three pin doesn't work on the models that have running lights/marker lights on the bike. If your front signal lights are always on do not buy this adapter it won't work. Unless you rewire your bike.
Auxiliary cable, relay and switch for Driving lights
UK customer: The switch fits very nicely onto various size of handlebar and is neat and tidy. The relay is hidden away somewhere and takes the full current of the lamps. The minimal switch current is only to operate the coil of the relay for lights on/off. Because the wiring harness is made for various bikes and component location it can be on the long side. For my application I had to modify it to have my relay in a different place and not under the seat where I had no room. A little skill in crimping or soldering is required to do this. The product is worth having just to give you a good overall installation of the driving lights.
Fit with no problems. Just didn't have the metal screw slots that slip over the plastic for the bolts to thread into. Make sure you have them, I just used the ones off my original broken headlight assembly.
For someone who doesn't ride primarily at night but wants an upgraded light setup, this is for you. There are some really nice setups on the market, but for someone who mostly rides in the daylight I would rather spend that money on other parts. Nice white/light blue light.