I have a GT mustang Manual. I was driving home the other day and when I pulled in and parked the car it died on me. I tried to start the car and nothing happened. I couldnt lock the doors, put the top up, roll up the windows or anything. It was dead. I sat there for two hours and tried again. The car turned on and I was able to roll up the windows and such than after turning my car off again I wasn't able to turn it back on. Since than turning the key does nothing to my car. It wont start or show any lights when I turn the key. However, the locks do work again. Any ideas on what could be wrong?