How To Drain A Car Battery. While I will suggest this with the preface of exercising caution you could connect a couple lamps together in parallel to reduce the resistance of the circuit. The following steps describe how to use a test light to check for parasitic draws on a car battery.
Car batteries usually go dead in cold weather mainly because the damage done during the summer doesnt show up until the battery is more forced to work like in the cold weather. With the negative terminal disconnected a healthy car battery will only self-discharge at 5 per month. Turn off all the Devices.
If your alternator has a bad diode it will cause your battery to drain.
A lead-acid battery typically loses about 5 of its charge per week just by sitting. Take the positive battery cable off your battery and using a good working 12V test light like this one attach one end of the test light to the battery and the other end to the positive battery cable. If your alternator has a bad diode it will cause your battery to drain. Why Does My Car Battery Drain When Its Cold.
