I have had my mustang for years, but it has been sitting up for around 6 months with a bad tranny/exhaust problems. I have fixed everything. However I have found a new problem but I dont even know where to start diagnosing it. My brake lights arent working, when I turn the headlights on they work, but when I hit the brakes they do nothing. Also my blinkers arent working, the turn signal indicators on the dash do not work, nor do the hazard lights. Where do I start to look?