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1996 Mercury Sable Question: What would keep drawing down the battery?

 

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bigmammac, 3.0L V6 DOHC, Portland, OR, August 05, 2014, 08:46
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We have replaced the battery,mega fuse and the constant control relay module. We want to remove the alternator to have it tested. Tests so far show no problems however the car keeps dying and the battery light keeps coming on and the battery keeps drawing down.

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  • Answer #1

    G. T. Service Center (4218 Answers) , Stephenville, TX - (254) 638-3236
    ProfessorG August 05, 2014, 08:55
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     Master

    If the battery light keeps coming on, there is an issue in the charging system.

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    bigmammac, August 05, 2014, 08:59
     Rookie

    What might that issue be? Where should we look?

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  • Answer #2

    August 05, 2014, 10:10
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    More than likely the alternator is the cause. If this is a problem when the vehicle is not running, you have a parasitic draw. Something is staying on when the vehicle is shut off.

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    bigmammac, August 05, 2014, 11:57
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    We have had the alternator tested and it tests ok. We are trying to remove it from the vehicle to have it checked,however can not figure out how to loosen the tensioner on the serpentine belt. Can you help? We can not figure out what is "on" when the car is "off" any ideas there?

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    csubak30, August 05, 2014, 17:52
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    No I don't know....usually the hood light is a culprit. It stays on when the hood is shut....you will know if you open the hood and the plastic cover is almost melting hot. Otherwise, it could be almost anything even a loose wire arcing to a metal surface. here is the tensioner location: http://www.hotspotoutdoors.com/forum/ubbthreads.php/topics/1495633/1996_Mercury_Sable_Serpentine_ Just scroll down.

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    bigmammac, August 06, 2014, 10:50
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    Thanks for all the help!!

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