I just recently bought a 67 Camaro RS and found that it has an electrical drain problem. When I bought the car, I test drove it, negotiated the price, and when I went to start the car again, the battery was dead. Since then, the car has drained the battery twice. After another dead battery, I suspected it was an old battery so I bought a new optima battery. After letting the car sit for two weeks, I come back to an dead battery. The previous owner mentioned replacing the wiring harness in the car which he said had cured all his electrical problems. Therefore, I assume the wiring harness is not the problem. Is there a way to check for a bad wiring harness or a bad installation that could lead to an electrical drain? If the wiring harness might not be the problem, are there any ideas as to what might cause such a drain? Are there any components that are notorious for draining the battery? What strategies should I use to determine the cause of the drain? Basically, I want this electrical drain problem fixed so I can drive the car daily without the fear of having to jump start my car all the time. Thanks in advance for all the help.