I was wiring up a fender eliminator tonight and ran into a problem. After doing the wiring I am not getting any change from the tail light when I hit either of the brakes. With the bike running I am getting 12V to both the black and green+yellow wire that goes to the tail light. The third wire is green which is ground. I believe that either the black or the green+yellow should only be 12V when the brake is pressed. Hit me with your best shot, I need some help.