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Old Aug 24, 2005 | 07:24 PM
  #1  
brunog's Avatar
brunog
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Default battery voltage

idle with air, radio, and headlights- it is about 12.9-13.1
idle with just radio-13.3
4th gear, radio on, air on, no headlights-13.6

Is this normal?
Should it stay a constant number or fluctuate based on what electricity is pulling ie lights, radio etc.
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Old Aug 25, 2005 | 11:55 AM
  #2  
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Seems a bit low. My 98 consistenlt puts out a charge system voltage of 13.9 to 14.2 vDC. Remember, with th eignition ON but the engine off, the voltage displayed (gauge or DIC) is Battery voltage, weith the engine running the value is for the charging system.

HTH
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Old Aug 25, 2005 | 03:43 PM
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brunog
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what should the battery voltage read with key on, engine off?
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Old Aug 25, 2005 | 04:00 PM
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Originally Posted by brunog
what should the battery voltage read with key on, engine off?
Most will probably show ~12v, +/- .5v or so.
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Old Aug 25, 2005 | 04:26 PM
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Originally Posted by brunog
idle with air, radio, and headlights- it is about 12.9-13.1
idle with just radio-13.3
4th gear, radio on, air on, no headlights-13.6

Is this normal?
Should it stay a constant number or fluctuate based on what electricity is pulling ie lights, radio etc.
Are you running alongside when you're checking it in 4th gear?
Be careful doing this!!
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