I have a 1970 Impala and that small wire from the Positive terminal has now burnt twice on me. 1st time I thought it was because the wire was old, insulation was cracking and it shorted on the metal behind the headlight. So I replaced the wire drove car for over a week and it happened again... this time when i was driving and the car went dead, smoke came out of the hood, I opened the hood, the small wire was burnt and laying against the metal behind the headlight. Also, the headlight wires and alternator wires burnt all the way thru and a wire in the bundle going from passenger side to driver was glowing / on fire. So, since I was on the freeway, I replaced the small wire started the car and drove home. Now I am in need of figuring out WHAT and WHY this is happening... Any suggestions on where to start? BTW, two weeks prior to the 1st time the wire burnt, I replaced the alternator and voltage regulator. Could they be wired up wrong? I personally do not see how that could have happened but is it a possibility?