I have asked this question before but, I am ready to dip into it now. My car (1965 mustang) is always low on "juice". If I don't start it with the first try, then it dies. It can sometimes die at lights too. I have replaced the battery and the alternator but, I'm still constantly charging it. What is my next step? Can it be a bad wire? Maybe the radio? Let me give an example, I charged it and then went to the grocery. When I came out I didn't get it to turn over on the first try and by the second time it was weak and getting weaker. After 15 minutes of being in the store and 40 minutes of driving it was that drained.