Battery Connection Problem
My wife's 2012 Impala quit while backing up in the driveway. I fiddled with the positive battery cable connection and got it powered up. I completely cleaned and coated both battery terminals. A week later the car momentarily lost all power again. The problem appears to be the wire connection to the metal terminal, for even when the car is completely dead I get full voltage from the cable terminals that are tightened to the battery posts. My wife is afraid to go anywhere, fearing the car will cut off anytime. What is the fix? How are the wires connected to the clamp terminals. I don't see anyway to tighten them?
Since the connection/terminals are OK at the battery end you have to follow both positive and negative cables back to the connection point on the car. They might be loose/corroded or the cable itself needs to be replaced. Most probably the negative side/ground issue.
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