How Do I Know My Battery Is Bad. There is nothing much that can be done on the battery in terms of repairing. If your battery is more than a few years old suspect that it may be nearing the end of.
Testing your battery and alternator tells you which one is the problem. If the battery light comes on and stays on while you are driving the most common cause is a broken alternator belt. Total failure of the alternator is another possibility.
Your vehicles battery is like its heart.
BAD ALTERNATOR SYMPTOMS. Total failure of the alternator is another possibility. Without it your vehicle doesnt have the power to start move or do anything else. The failing alternator symptom most drivers recognize is dim or flickering lights.
