Question about capacitors?

[zslatcher]

I just put a capacitor in my car for my stereo and I went out to my car and the battery was dead. I do not know if the battery was dead because I left a light on(i couldn't find one on) or what, but it was dead. My question is, is this because of the capacitor? If the capacitor has less than 12 Volts when I leave my car, and turn it off, will the capacitor drain the car battery?

[gotdubd]

it shouldnt
Ive installed hundreds of capacitors and never had that issue.

run back through your wiring

[04a430]

i second bad wiring. something is hooked up to a constant (amp turn on?).

[zslatcher]

the amps arent on.... maybe i just bumped a light