Battery draining

Asked by GuruW5P6V Jul 12, 2019 at 11:12 PM about the 2005 Honda Odyssey EX FWD

Question type: Maintenance & Repair

Would power sliding door quitting cause battery to drain every day.  Pulling fuse
doesn't stop drain.

1 Answer
43,910

Hornet_2497 answered 5 years ago

Older batteries can have internal shorts that can drain over night. I start buy fully charging the battery, and disconnecting it from the vehicle overnight. See if it's dead, or if there was a significant voltage drop over night. If it passes, then I would suspect a "leaky" diode in the alternator draining the battery. And if disconnecting the fuse didn't stop the "drain", then the power door is "innocent".

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