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Freightliner cab losing power.

Discussion in 'Freightliner Forum' started by wardog23, Nov 27, 2011.

  1. Nov 27, 2011 #1
    wardog23

    wardog23 Bobtail Member

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    Nov 27, 2011
    0
    I have a 2009 Freightliner Colombia. The issue I'm having is that the cab keeps losing power after I shut the truck down. The battery protection device kicks in and kills the power within an hour or less. It even does it when nothing is plugged in. The truck has new batteries and a new alternator. Any tips or advice would be much appreciated.
     
    wardog23, Nov 27, 2011
    wardog23, Nov 27, 2011
    #1
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  3. Nov 28, 2011 #2
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
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    Oct 11, 2010
    Borispol, Ukraine
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    check voltage on battery protection device terminals, if it is really lower the limit - check voltage on battery terminals. if you get over 1 V difference - look for bad connection.

    Check battery protection system grounding too.
     
    Pablo-UA, Nov 28, 2011
    Pablo-UA, Nov 28, 2011
    #2
  4. Dec 4, 2011 #3
    ctc

    ctc Bobtail Member

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    Aug 12, 2011
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    step one is to load test each battery I know you say they are new but when a truck comes in to my shop I start with the basics. If the batteries load test ok. Check key off amp draw. If there is an excessive load with the key off start isolating each circuit to find your load.
     
    ctc, Dec 4, 2011
    ctc, Dec 4, 2011
    #3
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