Question about 1995 Cadillac DeVille

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BATTERY IS DRAINING EVEN WHILE CAR IS NOT IN USE

BRAND NEW BATTERY BATTERY SLOWLY DRAINS COMPLETELY OUT AFTER A FEW DAYS CAR IS IN GARAGE NOT BEING DRIVEN
1995 DEVILLE CONCOURS

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  • RODNEYH Apr 12, 2009

    TRIED THAT ALL THE LIGHTS ARE OFF WHAT NOW

  • Eric Heifetz
    Eric Heifetz May 11, 2010

    sounds like you have a 12V drain such as a light staying on unbeknownst to you

  • Dave  C
    Dave C May 11, 2010

    Nine times out ten this is caused by a light that is on. Check it at night to see if any interior lights are left on. Put someone small in the trunk and see if that one stays on.

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  • Master
  • 607 Answers

I stated "such as a light " there are many, many other causes of 12 volt drains such as a seat switch that might hang up and stick. Empty that battery overnight. First install a 9V Battery Radio memory / and clock or you will have to reset both. Disconnect BLACK negative cable of battery. Using a 12V testlight, connect one end to the disconnected cable, and the other to the negative battery terinal. It should light. Remove the 20A BODY and LIGHTER fuse first . This will eliminate the courtesy light circuit . If light goes off the drain is on that circuit. STILL LIT ? drain is on another circuit. Start by eliminating fuses. Hope this helps.

Posted on Apr 13, 2009

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Robert

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