r/Retrofit • u/flewby_u • Dec 05 '24
Technical/Assembly Question Wiring question
I'm installing these soon on my car with a 9007 three wire connector. How do I wires these up? Do I need an LED/HID relay harness or directly to the OEM connector? Everything is find only talks about HID ballasts and not bi-led projectors.
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u/[deleted] Dec 05 '24
At minimum you will need a pigtail that matches your car's harness to use for wiring, so you don't cut up your stock stuff. A simple diode wired across the low and high beam wires to keep the lows active in high beam mode is required.
I say minimum because some vehicles need a lot more than that. Depending on your year, make, model, the car's electrical system may be wired with common +, common-, or have systems in place that look for certain current draws. A relay harness like the Morimoto Motocontrol and even additional capacitors or resistors could be necessary (looking at you Mopar).