Question about 2003 GMC Sierra 2500HD

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Drain on battery..have pulled all fuses..still a drain

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  • Sheila Van Alstine
    Sheila Van Alstine Jul 13, 2009

    I have put a test lite between the neg. terminal and wire when disconnected, pulled every fuse in all 3 boxes 1 at a time and lite never dimmed or went out . what circuit could drain the batteries overnite and not be in the fuse boxes ???

  • Anonymous Mar 24, 2014

    pull tbc fuse 19 and drain stops also pull radioe fuse 1 and drain stops.

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  • Expert
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Have you tried disconnecting the battery earth and then checking the voltage in the morning,if the battery is flat,then you know you have a battery fault,if the battery is still fully charged you need to do a voltage leak check,the most common cause of battery drain is faulty altenator 1 way diode (altenator gets warm engine off and cold)boot light staying on (faulty switch) etc.

Posted on Jul 12, 2009

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  • GMC Master
  • 14,036 Answers

Have battery tested it could be the problem.

Posted on Jul 12, 2009

  • Jonah Oneal Jul 12, 2009

    a battery can drain through alternator and pwer door locks.radio.interior lights left on car alarm door chime and HVAC power module.but if you take out fuses.battery more likely have a dead cell in it..

  • Jonah Oneal Jul 14, 2009

    i remember a while back.a bad starter solenoid contacts shorting will drain battery.

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Battery drain, fuse #12 in 2000 Jeep Grand Cherokee


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Suggest that you disconnect power to the car for several minutes. Reconnect the battery. The object is to reset the body electronics module.

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http://www.tomorrowstechnician.com/parasitic-drain-ii-jeep-grand-cherokee
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Instructions for measuring automotive battery current drain. ... Excessive current drainwill usually result in the battery running down overnight or within a few days. ... Many digital meters have a 2 amp internal fuse that may blow if multiple ... If pulling fuses and circuit breakers doesn't stop the current draw, you'll need to look ...

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www.instructables.com/.../How-do-you-trace-a-drain-on-the...

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