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Hi im new here, I have a 94 corolla that seems to cut off when too much power is on.  It only does this sometimes.  Sometimes the car will startt and everything will work, but at least 5 times a week ill go to start it and ill get nothing not even a click. In order to get it running I have to barely wiggle the battery cable to the positive cable and then it will start.  However there have been instances where I would start it fine and then it would cut off when I turn on the headlights.  There has also been times when i was driving the car and turned on the high beams and the car just shut off.  I had bought a new battery and still same problem.  I also bought a new terminal but still same problem.  Any ideas on why this is happening? thanks,
John