Post by
jt15833 »
https://forums.nicoclub.com/jt15833-u30482.html
Wed Feb 21, 2007 5:50 pm
im pretty sure theres 2 grounds and 2 sources for 12v. when either one of the 12v wires sees 12v, its on low. when both see 12v, its on high. use relays. wire the relays to flip on when the engine is on, i used the fuel pump relay wire but its having issues, but this is usually the one to go off. i have it setup so that both are on low when the car is on, and both can be on high through switches inside the cabin.