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Alternator Charging High

Discussion in 'Chevy Trucks' started by jklawn&Plow, Dec 14, 2011.

  1. jklawn&Plow

    jklawn&Plow Senior Member
    Messages: 469

    My 2007 2500HD seems to be charging higher than normal , like 15-16V it used to go down to 14V after 30 seconds when started. Noticed this because I can hear the inside fan fluctuating and noticed the gauge is pinned up high. I wonder if this is an early warning sign that the battery is starting to go thus the ECU is charging higher?
     
  2. Antlerart06

    Antlerart06 PlowSite Veteran
    Messages: 3,437

    regulator is bad
     
  3. jklawn&Plow

    jklawn&Plow Senior Member
    Messages: 469

    Thats what I thought but noted the computer does some different things to control the regulator. Saw this in the upfitter doc . If the computer can't control it its supposed to default to like 14.62 Volts. Battery is 4 years old, 2.5yrs plowing and its only 615CCA I think.
    Is there a way to check the regulator control signals?
     
  4. Antlerart06

    Antlerart06 PlowSite Veteran
    Messages: 3,437

    Auto Zone or a parts store if regulator bad and charging to much it can burn up ur battery
     
  5. jklawn&Plow

    jklawn&Plow Senior Member
    Messages: 469

    Guess I'll pop it out and get it tested.