Friend got new Subs and Amp. I hooked em up as i always do, no problems, till i got to the speaker wire. I plugged in negative, and got a spark. Nothing starts now. Dek, Subs, Amp, NOTHING. 0 Power. So i go to fuse box, and what do you know, the cig lighter is blown, (replaces) Still nothing, no power to anything. Checked every fuse, including the ones on amp, back of dek, and battery-Amp. All fine... Someone help...