If you have the ebay projectors, THEY ARE COMPLETELY PLUG AND PLAY. Zero splicing, tapping, wiring, resisting. I have the ebay projectors and led tail lights and haven't altered a single wire for any of them. The switchbacks are the only thing that need resistors. My Halos and LEDs work perfectly in the headlights and have since day 1 lol don't make this more difficult than you have to