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Proper Voltmeter Reading

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Old May 31, 2010 | 02:14 PM
  #1  
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pminne
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From: Parker, CO
Proper Voltmeter Reading

Hi Guys,
My Isspro voltmeter is reading just under 14v (13.8-13.9 ish) even with all electrical items turned off. Is this a normal range? I was thinking it needed to be more like 14.1-14.2 or so. Thoughts?
Thanks!
 
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Old May 31, 2010 | 02:30 PM
  #2  
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clintbonnie
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From: Ardenvoir, Washington
Did you take the readings after the glow plugs cycle switched off, which takes a couple of minutes if the engine is on a cold start up. But, yes it should read a bit over 14v if your batteries are in good shape..
 
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Old May 31, 2010 | 02:45 PM
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pminne
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From: Parker, CO
Yep, the truck was warmed up, batteries are about 6 months old. Could it be the voltage regulator?
 
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Old May 31, 2010 | 02:51 PM
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megawatt00
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Take another reading using a DVM to compare readings
 
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Old May 31, 2010 | 02:55 PM
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Mine will run 14+ volts for a half hour or so after starting but then drop to ~13.8v after driving for a while. I was under the impression that by then the batteries had been recharged from the start and not as much voltage was needed to run the truck. Sounds good anyway.
 
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Old May 31, 2010 | 05:13 PM
  #6  
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pminne
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From: Parker, CO
I'm getting 14.1 and the Isspro is now showing that too. Must have had something on or its a bug that has started....Thanks guys
 
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Old May 31, 2010 | 05:13 PM
  #7  
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pminne
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Rocky Mountain High
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From: Parker, CO
Farmdad/Mark: good point, could be that too...electrical issues are the worst IMO.
 
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