Forum Discussion
opnspaces
Aug 27, 2023Navigator II
If you have two 12 volt batteries most likely only one is bad and dragging the second one down. Just disconnect them and run your test on a single battery. You should be able to isolate the bad battery from the good pretty quickly.
In fact you can probably just charge them both up full. Then wait until they drop to 12.5 volts so you know that the drain is happening. At 12.5v disconnect the ground terminal of each battery. Come back in an hour and do another voltage check at the batteries. At that point it should be very obvious which battery is having a problem.
In fact you can probably just charge them both up full. Then wait until they drop to 12.5 volts so you know that the drain is happening. At 12.5v disconnect the ground terminal of each battery. Come back in an hour and do another voltage check at the batteries. At that point it should be very obvious which battery is having a problem.
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