my car dies while driving, and when I try to restart it, it is completely dead. It only happens at night when I have to use my headlights. I have replaced two alternators, two batteries, and had a new wire put on that goes from the alternator to the starter. My car CAN be jump started. When I had someone test my alternator for me, they said that my alternator wasn't charging. What else could be draining the power from the Alternator?