Mechanically I have my 67 rs/ss ready to roll, however i still havn't got the back lights working. I beleive its a ground problem. when i take my light tester i get power at the back bulbs when i hit the brakes, turn on the lights, and use the turn signals. I replaced the flasher unit today. the lights don't light up at all when the brakes are pressed, the turn signals barely light up the bulb and don't flash. Please give me some advise because i have an appointment for Monday morning to get dual exaust installed.