My first car was a 1991 Ford Taurus SHO. I got it in 2001. 220 HP from a DOHC 3.0 Yamaha V6 with dual length intake runners and a 5 speed manual transmission. Pretty stout for it's day.
Anyway, it had an electrical gremlin that 16 year-old-me didn't have the skill or patience to track down and actually fix. It had a bad habit of burning up batteries and wearing our alternators.
The first time I replaced the alternator took me 2 days, and 1,000s of swears. Eventually, I got to where I could swap it in 25 minutes flat in any parking lot, anytime, anywhere. It helped that AutoZone had a lifetime warranty on that part!
Moral of the story? It's good to know how to work on your own stuff if you want to, and it's easier to swap an alternator than to chase down a short. Maybe the 2 12' subs, 800W amp, and 1 Farad capacitor I had hooked up had something to do with it?