THEY WIRE UP PRETTY MUCH THE SAME AS YOUR STOCK TAILS, IF I REMEMBER RIGHT YOU HAVE TO RUN TWO WIRES FROM THE SOCKET ON THE LIGHT TO THE ONE WIRE IN THE HARNESS, LAST TIME I DID IT I HAD A BUDDY HELPING ME AND USED A JUMPER WIRE TO TEST WHAT WAS WHAT ON THE LIGHT, HAVE HIM TURN ON THE LIGHTS, BLINKERS ETC, AND DO A PROCESS OF ELIMINATION ON THE TAILS... I DONT KNOW IF THIS WILL HELP ANY, LEMME KNOW IF YOU KNEED ANY MORE HELP, JUST TAKE SOME TIME TO TEST EACH WIRE......