66 barracuda ignition problem

rewiring the car is on the distant horizon. after changing the bulkhead connectors, and someothers i was sure that the problem was solved. this weekend i will be tracking down where the "open" is in the circuit. after studying the wire diagram the only thing i have left to work on is the ignition switch plug, headlight switch, and the fuse panel. when the car went dead nothing was running except for the motor (turn signal lights are LED)
It didn't seem like it could be related at first, but i left my lights on that morning, jumped started with my portable jump-box (which was almost dead too), drove home 15 miles, then the car died in the drive way (or wouldn't restart, something on the starter relay?). i thinking maybe with the dead battery drawing so much extra amprage (maybe 15-20amps) from the alterenator and driving with the coil drawing amperage (maybe another 10amps). a plausible 30 or more amps though an old wire connector...