Considering the H4 upgrade? Ned Ritchie used the female harness off of a Nissan Maxima (1990 or newer I believe) to wire and connect to my existing DOT wiring. I installed them with a helpful friend (Boeing Elect Eng) and after 1 hr per light am in business. Used them for 2 months now, no problems and I can see at night now!!!!. HTH, John