What Would Drain A Car Battery

In that case a charging issue can make the draining worse. Many car models use the alternator to charge radio clock lights and other small components. The good news is theres a diagnostic you can run as well see below.

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It may drain car battery even when you are driving.

What would drain a car battery. We came across a few cases where water leaked into the electrical components shorting the wiring and draining the battery. New car features such as heated seats and keyless entry can also malfunction and begin to drain the battery. Bad charging when the battery is not charged properly because of a faulty charging system your battery can be discharged even when you are driving. The alternator may have loose belts or worn out tensioners that keep it from working properly.

Now that we have verified that the battery is experiencing a parasitic draw we can move to exploring the different reasons and parts that can be pulling on your cars battery. In one car a door switch has been damaged and the door ajar light was staying on on the dash draining the battery. Even if youve already ruled out obvious things like the headlights and dome light there may still be a drain in your system. Therefore when doing this test make sure that the dome light under hood light trunk light etc.

A parasitic drain is when an electrical device is using battery power when the car is closed and the ignition key removed. If your car battery keeps dying over and over again one of the simplest explanations is that there is some kind of drain on the system that persists after you remove the keys and lock the doors. If your charging system isnt working properly your car battery can drain even while youre driving. Loose or corroded connections wont let the charging system to work properly.

When however there is an electrical problem the drain on the battery can be excessive. Thus the battery dies. The good news is theres a diagnostic you can run as well see below. Electric devices like timed and dimming dome lights can stay awake and produce excessive drain on the battery for up to 10 minutes.

Many cars power their lights radio and other systems from the alternator which can make the battery drain worse if theres a charging problem.