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Anonymous Posted on Nov 13, 2010

I have a 1999 Mercury Sable and accidentally installed the battery backwards. Replaced blow fuses and the car ran fine. After sitting idle for 3 days, returned to find the new battery dead. A jump start got the car going, but after driving 40 miles, then turning the car off and then immediatly trying to start it, the car would not start and the battery was very dead. I think the alternator/ generator must be working because during the 40 mile drive, the lights worked fine. Other than needing to be more careful, any ideas?

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  • Posted on Nov 13, 2010
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Check and make sure your termimals to the battery are clean and tight. You can find out if the alternator is charging by simply starting the car and while it is running take the negitive cable off the battery. If the car quits its not charging (have the alternator check) if the car keeps running it is working properly. If it is charging and all your termimals are tight and clean you may have shorted out the battery and ruined it by hooking it up backwards. Good luck

Testimonial: "Good sound advice. Thanks."

  • Anonymous Nov 13, 2010

    One of the cables to the battery was loose. I tightened it and the car started. Thanks for your help.

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