VEHICLE JUMPED STARTED BY AAA. THIS CAUSED THE BATTERY WIRES TO MELT. MECHANIC SAYS COMPUTER & WIRES WERE BURNED. AAA CONNECTED WRONG PLUS & MINUS. SOME VEHICLE PROTECTED AGAINST THIS PROBLEM BY HAVING A DIODE AND FUSE WHICH WILL PREVENT CURRENT FROM FLOWING IN THE WRONG DIRECTION AND DAMAGING THE VEHICLE. *AK *ML