Fix Car Battery Drain

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 won t start.

Fix car battery drain.

That seems like a tiny amount but a single incandescent dome light pulls enough power to drain a battery in one day. Remember that the drain doesn t have to take your battery to zero overnight just low enough for it to not start. New vehicle models make it specially difficult time consuming and frustrating. In other words car battery drains when it is not charged enough which is a common problem when using powerful amplifiers.

Let s find out what does it mean and how to fix this problem. If the battery drains when the vehicle sits for three or four days that s a lower amp draw than one that drains. What causes a car battery to keep dying. Why does a car need battery.

The simple answer is yes but a car battery can only be drained when it sends more power than receives back from an alternator. If your alternator has a bad diode your battery can drain. They come with more control modules than previous year models and hundreds more electrical circuits.