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Overcharging and battery drains over night
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Russell775
New User
Jan 26, 2017, 3:26 PM
Post #1 of 6
(1449 views)
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Overcharging and battery drains over night
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1986 Toyota p/u 22R 300k miles
The battery would drain over night so i would just take a battery cable off and it was fine. But then after a while it would overcharge the battery and it kept getting worse. At first if i ran the heater high beams and wipers the battery light would turn off but that doesnt work anymore and dang near melts the battery.
Only thing i have done to the truck is pull the stereo out.
(This post was edited by Russell775 on Jan 26, 2017, 3:29 PM)
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 26, 2017, 4:29 PM
Post #2 of 6
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Re: Overcharging and battery drains over night
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Do you have a digital volt meter? If so, what is the charging voltage? A faulty alternator regulator will cause an overcharging condition.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jan 26, 2017, 4:30 PM)
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Russell775
New User
Feb 11, 2017, 3:39 PM
Post #3 of 6
(1389 views)
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Re: Overcharging and battery drains over night
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Found my meter and its charging at 19.25v. 😲
Would a bad voltage regulator be a source of the battery drainage too?
Thanks
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Hammer Time
Ultimate Carjunky
/ Moderator
Feb 11, 2017, 6:29 PM
Post #4 of 6
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Re: Overcharging and battery drains over night
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Don't be so sure it's draining at all. Charging at that rate will fry the battery in pretty short order. It will also do a lot of damage to electrical components in the car.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Russell775
New User
Feb 17, 2017, 8:57 AM
Post #5 of 6
(1350 views)
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Re: Overcharging and battery drains over night
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Got a new alternator and that fixed all problems
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 17, 2017, 10:59 AM
Post #6 of 6
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Re: Overcharging and battery drains over night
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You should retest battery as if the one in it now was getting out that 19.25V it took a hit and no question got too hot to trust if more than a few seconds of that. The problem is playing "ping-pong" back and forth with a once failed alternator output and an IDK what or how to trust the battery except long time without problems,
T
(This post was edited by Tom Greenleaf on Feb 17, 2017, 11:02 AM)
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