Tonight I made a huge mistake while trying to put in new baterries in my 1996 horizon I hooked up the positive to the negative and vise versa on one of the batteries. I hooked the other side up correctly, but did not notice my mistake until I turned the switch to all and it melted the terminal off of one of the batteries. I went and bought two new ones hook them up correctly but nothing works and it won't turn over. Any ideas of what I might have done?