Gauge Wiring Question
I just install an autometer electric nitrous gauge and it now only works when I turn my lights on. I used a fuse tap and tapped fuse 37 for a keyed 12v source, black to ground, and the white wire I ran to the headlight switch harness and I tapped the main big gray wire. It works great when my lights are on but when I turn them off I get nothing... I figured I could just connect the white wire to the keyed 12v source too but I dont want the gauge to be lit up all the time. How can I wire so that the gauge always works when the car is on but the lights will only go on when I turn the headlights on? Thanks!