hope someone can help me. putting in a brake controller and followed the instructions and located the plug in under the dash. plugged the 4 wires in just the instructions say and I get nothing. no power nothing. I have played with it and cant get it to register. someone help me? maybe my wires are crossed but according to the instructions its correct. searched on the net and found again that its wired correct. check fuses and no fuses are blown. put power to the brake controller and it lights up. any suggestions?