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How do you trace a battery drain?
Pull the negative off the battery. Put the test light between the post and the ground wire. If the light illuminates, you have a draw. Use the fuse pull method to find the draw; when the light goes out, you found the draw.
Can a tracker drain your battery?
Provided you choose a reputable tracking company and perform the necessary maintenance on your unit, a tracking device should not drain a car’s battery. “A tracking unit only uses one mA or less during the course of a day. The units engage ultra-low power mode for most of the day.
Can a bad fuse cause car battery to drain?
Something is causing a “parasitic draw.” What may drain a car battery when it’s off, however, are things such as interior lights, door lights, or even bad fuses. The battery strain caused by these electrical whoopsies is known as a parasitic draw.
How can I check the drain on my battery?
Some check parasitic drain directly at the battery with a digital ammeter and a test switch. Others do it by clipping an inductive current clamp around a battery cable. If the drain is excessive, the most common way of isolating the cause is removing one fuse at a time.
How to diagnose an intermittent parasitic battery drain?
Everyone has a favorite diagnostic method for finding the source of a parasitic battery drain. Even so, some draws are more difficult to locate, especially when they’re intermittent.
How often does a car battery drain overnight?
Because it is an intermittent problem (on the order of once every couple of months), it’s no surprise that mechanics find nothing when doing an overnight draw test. That is to say that the problem has never occurred when the car is in the shop. FWIW, I have not left the lights on on the nights that the battery drains.
Can a father tell you if your car battery is draining?
No, this is not your father’s battery drain diagnosis. Sure, some basic steps are ones you may already know; and some steps apply to all vehicles. But you must evaluate each vehicle individually to judge the most efficient way to measure key-off battery drain.