Fix Car Battery Drain

New vehicle models make it specially difficult time consuming and frustrating.

Fix car battery drain.

If the battery drains when the vehicle sits for three or four days that s a lower amp draw than one that drains. They come with more control modules than previous year models and hundreds more electrical circuits. Let s find out what does it mean and how to fix this problem. Car battery problems specially a parasitic battery drain are difficult to diagnose sometimes.

What causes a car battery to keep dying. Remember that the drain doesn t have to take your battery to zero overnight just low enough for it to not start. If your alternator has a bad diode your battery can drain. That seems like a tiny amount but a single incandescent dome light pulls enough power to drain a battery in one day.

The simple answer is yes but a car battery can only be drained when it sends more power than receives back from an alternator. Why does a car need battery. A car alternator recharges the battery and powers certain electrical systems like lights radio air conditioning and automatic windows.