Mechanics

MERCURY COUGAR BATTERY PROBLEM

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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Cstaff25
October 30, 2012.




So at idle what is the battery voltage reading at the battery?


Saturntech9
Oct 30, 2012.
14.71v


Tiny
Cstaff25
Oct 30, 2012.
Have you had the battery tested yet?


Saturntech9
Oct 30, 2012.
Yes the battery is good


Tiny
Cstaff25
Oct 30, 2012.
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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Saturntech9
Oct 30, 2012.
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


Tiny
Cstaff25
Oct 30, 2012.
Alright keep me posted.


Saturntech9
Oct 30, 2012.
Turned out to be a dome light left on and bad terminals. Thanks for your help.


Tiny
Cstaff25
Nov 8, 2012.
Your welcome thats what were here for.


Saturntech9
Nov 8, 2012.

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