[fireant]

Brake light fuse maybe? That raises a flag to me. Are your brake lights staying on? If so it may be that the little black stopper on the brake pedal has crumbled and isn't pressing the brake light switch anymore.

Thats exactly what I was thinking. I park in my garage that has very bright lights, so I never noticed my brake lights staying on when the brake pedal switch stopper was broken until my battery was dead. If its broke, your brake lights will always be on.