Parasitic battery draw
Seasoned HDF Member
Joined: May 2008
Posts: 21,173
Likes: 12,740
From: South Carolina
The first thing you need to do is charge the battery and take it to an auto parts store and have them load test it.
Until you have a known good battery, fully charged, attempting to troubleshoot is just chasing your tail.
.8 amps?
Are you sure it is not .8 Milliamps?
Until you have a known good battery, fully charged, attempting to troubleshoot is just chasing your tail.
.8 amps?
Are you sure it is not .8 Milliamps?
Last edited by Dan89FLSTC; Sep 30, 2023 at 12:24 PM.
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Novice
Joined: Mar 2021
Posts: 19
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From: TampaBay
It took all day to charge up this fairly new battery. My meter was set to the 10 amp DC scale and it read point 8 amps. I was afraid to set it to milli amps as my meter only reads that scale up to 200 milli amps. Plus the fact that the battery was virtually dead the next day leads me to believe that it is in fact a huge parasitic draw.
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Joined: Apr 2016
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From: Inland NW
It took all day to charge up this fairly new battery. My meter was set to the 10 amp DC scale and it read point 8 amps. I was afraid to set it to milli amps as my meter only reads that scale up to 200 milli amps. Plus the fact that the battery was virtually dead the next day leads me to believe that it is in fact a huge parasitic draw.
Even on a group 31 battery, 8 tenths of an amp would drain it overnight to the point a vehicle would not start.
Last edited by NorthWestern; Sep 30, 2023 at 03:19 PM.
Seasoned HDF Member
Joined: Aug 2006
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From: Pennsylvania
Just a thought, if the battery is fully charged and disconnected does it hold a charge?
Would not be the first time a newer battery had an issue with plates having a parasitic draw.
Would not be the first time a newer battery had an issue with plates having a parasitic draw.
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From: Mostly Florida, some Michigan
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Novice
Joined: Mar 2021
Posts: 19
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From: TampaBay
The battery stayed fully charged overnight, although it had been disconnected from the battery cables. Still in the process of disconnecting harnesses individually. I removed the fuel tank and then when I disconnected the IAC connector the parasitic draw went from .8 amps to .38 amps. Could this be my smoking gun?? I know that this draw still seems a bit high but I also noticed that when I turn the meter on, the anti-skid solenoid energizes and I'm thinking this is normal and drawing that .38 amps.