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The battery keeps draining

Tiny
CSTAFF25
  • MEMBER
  • 1997 MERCURY COUGAR
  • 125,000 MILES
The battery keeps draining. I have measured the key-off pull and it is only.15 ma. I am not an expert in electrical stuff, but I don't think that is enough to have to worry about. Since it keeps draining I went ahead and did a "fuse pull" test. After I pullled every fuse there was no significant drop. Whenever I do start the car it seems to have barely any power -> I can press the gas but it spits and sputters for a few seconds and then starts working fine. The battery drain is more important for now, I just didn't know if the latter part was relevant to that problem.
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Tuesday, October 30th, 2012 AT 8:15 PM

9 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
So at idle what is the battery voltage reading at the battery?
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Tuesday, October 30th, 2012 AT 8:20 PM
Tiny
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  • 46 POSTS
14.71v
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Tuesday, October 30th, 2012 AT 8:25 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Have you had the battery tested yet?
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Tuesday, October 30th, 2012 AT 9:11 PM
Tiny
CSTAFF25
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  • 46 POSTS
Yes the battery is good
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Tuesday, October 30th, 2012 AT 9:18 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
I have seen batterys self discharge and load test good ethier something is draining the battery or its just not holding a charge. Try this after your done running the car remove the the negative battery cable over night and then when you go to start it hook the cable back up and see if the battery is drained?ALso please do the draw test with the test light like I posted.
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Tuesday, October 30th, 2012 AT 10:22 PM
Tiny
CSTAFF25
  • MEMBER
  • 46 POSTS
Ok I will try these things, thanks. Also, I know the battery is losing about.16v every 1.5-2 hours.I tested this yesterday
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Tuesday, October 30th, 2012 AT 10:28 PM
Tiny
SATURNTECH9
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  • 30,870 POSTS
Alright keep me posted.
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Tuesday, October 30th, 2012 AT 11:15 PM
Tiny
CSTAFF25
  • MEMBER
  • 46 POSTS
Turned out to be a dome light left on and bad terminals. Thanks for your help.
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Thursday, November 8th, 2012 AT 5:54 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Your welcome thats what were here for.
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Thursday, November 8th, 2012 AT 6:10 PM

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