well i just got a headunit and intslled it, and i had to take out my old batt to charge, and when put it in i got lost and put the connections on the wrong end (they r both red grr) and when i did this i had secured them on tightly so what happned was all the wires started smoking and all the fuses well...did what overloaded fuses do (thank god)....and now my car wont even turn ...yea just had to vent my anger ....the wires actually melted i have never seen that before ...hmm yes anyhow