I made this so it is plug and play of a sort. Everything is soldered and heatshrinked. I'm still missing the connectors for the battery and ground and the solenoid wires (that I have just haven't crimped them on). You connect to your stock bulb plug and it gets signal from there. On that same run I added the diode that goes across the high beam and low beam. Also from there I ran 2 lines for the bi-xenon solenoid. If you want i can make you a harness just let me know the type of connector or the bulb (i.e. H7, H4, etc). and the dimensions of where you want to mount everything. I have everything to make a harness just need to know the bulb connector.