71 Ign OFF continuous battery discharge - NCRS Discussion Boards

71 Ign OFF continuous battery discharge

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  • Norman S.
    Frequent User
    • September 30, 2002
    • 69
    #1

    71 Ign OFF continuous battery discharge

    On a 71 350/270 AT -- with everything apparently OFF, there continues to be about a .1 Volt discharge per 24 hours. There are no aftermarket accessories or alarm system. Just wondering if this is a known or common problem and is there anything in particular that I should check for first?
    Suggestions to trouble shoot gratefully received. Thanks.
    Tags: None
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    • John O.
      Very Frequent User
      • May 31, 1998
      • 480
      #2
      Re: 71 Ign OFF continuous battery discharge

      Do you have a clock in your car thats running? That might be it.

      John
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        • Sal C.
          Very Frequent User
          • December 1, 1984
          • 430
          #3
          Re: 71 Ign OFF continuous battery discharge

          The first place I would look is the center rear storage compartment. Make sure the button is depressed enough to turn out the light.
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            • Dick W.
              Former NCRS Director Region IV
              • June 30, 1985
              • 10483
              #4
              Re: 71 Ign OFF continuous battery discharge

              Bad diode in alternator will also discharge battery. If after checking the center compartment light as Sal said, I would start checking circuits by removing one fuse at a time until I found the circuit that was the culprit.
              Dick Whittington
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                • Norman S.
                  Frequent User
                  • September 30, 2002
                  • 69
                  #5
                  Re: 71 Ign OFF continuous battery discharge

                  Yes, I have checked glovebox light and other courtesys, clock is stopped.
                  I would like to find the engineer that approved the location of the fuse box and make him crawl under there!! Thanks for your suggestions.
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                    • Chuck G.
                      Extremely Frequent Poster
                      • May 31, 1982
                      • 2029
                      #6
                      Re: 71 Ign OFF continuous battery discharge

                      Check the "wiper service switch", the black wheel under the steering column between the wiper door and headlight vacuum overrides. Often, if you leave it "OFF", or use it to operate your wipers, it will cause a battery drain. Chuck
                      1963 Corvette Conv. 327/360 NCRS Top Flight
                      2006 Corvette Conv. Velocity Yellow NCRS Top Flight
                      1956 Chevy Sedan. 350/4 Speed Hot Rod
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