Does A Bad Alternator Drain Your Battery. Many people even professionals are quick to assume the battery is bad but this can be a costly assumption if your failing alternator kills your newly replaced battery too. The three faults in the alternator that make your new battery go bad are.

The bad alternator diode can cause the circuit to charge even when the engine is shut off and you end up in the morning with a car that wont start. If the alternator is producing no or insufficient charge the battery will simply run flat and this is poison to a. Your stomach sinks as you put in your key only to have your car not turn on.
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Will a bad alternator ruin a new battery. The alternator is likely to be damaged if the car stalls or stalls. How long does it take for a bad alternator to drain a battery. Your stomach sinks as you put in your key only to have your car not turn on.

