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04-17-2022, 04:16 PM
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#1 |
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Registered User
Join Date: Dec 2011
Location: Boise, Idaho
Posts: 555
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battery drain,
Hello All,
I have read a dozen post with no conclusion and watched a real good video from South Main Auto I still have to ask,,, What is the acceptable drain on a 2003 suburban. I get .8 amp draw after waking up anything on the truck. Sometimes after ~10 minutes it will drop to .2 amps and then if i let it sit it will drop again to .02 amps. Sometimes,, it seams to never drop. .02-.03 seams a little high??? It appears the radio fuse is causing .5 amps and the TBC fuse is another .1 amp. Removing both gets me to the .02 draw. My amp is bad and the radio sounds like garbage so the amp may be on all the time? Any insight on this? Chris |
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04-17-2022, 05:32 PM
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#2 |
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laying low
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,955
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Re: battery drain,
Your car alarm uses power the whole time it is armed too.
__________________
Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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04-18-2022, 12:27 PM
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#3 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,912
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Re: battery drain,
.02-.03 after around 20 minutes is fine. That's when the BCM typically goes to sleep.
The BCM should tell the radio to sleep as soon as the key is off and the Driver door is opened. Half an amp to the radio after the door is opened would make me look at the door latch switches. You need to look at what the TBC fuse feeds and track that down too. 1/10th of an amp will kill the battery overnight.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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04-28-2022, 06:25 AM
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#4 |
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Registered User
Join Date: Jul 2017
Location: Texas
Posts: 396
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Re: battery drain,
How fast will the battery self discharge if there is no battery drain?
I once had to work on this mitsubishi eclipse that had sat for 6 months in a shed with nobody even going out there for anything. It started right up. They put it in there because it wouldn't start and they didn't have the money to fix it. A fuse had popped. Replaced the fuse, car started. Made me wonder just how long a battery can sit in a vehicle without draining. |
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04-28-2022, 12:54 PM
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#5 |
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Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,912
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Re: battery drain,
A lead acid battery will eventually fail all on it's own with nothing hooked up to it. Not sure what the shelf life is.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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04-29-2022, 03:27 AM
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#6 | |
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Registered User
Join Date: Apr 2006
Location: MinneSNOWta
Posts: 1,381
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Re: battery drain,
Quote:
A fully charged battery, stored in a relatively mild climate could sit for years, as long as there's nothing drawing power. up here where it can reach -30 during the winter, a fully charged, and disconnected battery should be good till spring... Conversely, if the battery is stored with a low charge, in those extreme temps, it's likely toast... I don't want to think about how many batteries i've killed that way...
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2003 GMC Sierra 1500 WT 1995 Nissan Hardbody 2016 Hyundai Veloster Turbo DC2 (SW/AW) Clyde W. Harvey USN "Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery" Winston Churchill Last edited by brak; 04-29-2022 at 05:40 AM. |
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04-29-2022, 07:33 AM
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#7 |
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Registered User
Join Date: Jul 2017
Location: Texas
Posts: 396
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Re: battery drain,
Which batteries are immune to this? AGM perhaps?
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04-29-2022, 10:43 AM
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#8 |
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Moderator
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,912
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Re: battery drain,
None. They're all dependent on a reversible chemical reaction. They all degrade over time.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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