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13.9 to 14.3 VOLTS with engine running.

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15y ago

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On a 1994 Suburban what should the voltmeter read when running and when the engine is off?

Running, voltage should be around 13.5 VDC. It may be a little more but shouldn't be much less. Off, the voltage should initially be slightly over 12 VDC but will settle down to around 12 VDC after it sits for a while.


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Alternator is not charging battery sufficiently check with voltmeter With engine running voltmeter should read 13.8-14.2


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When running voltmeter should read approx. 13.8-14.2 volts


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A voltmeter works by measuring the amount of volts of electricity being given by an electrical line or battery. A digital voltmeter has an easier to read display and is also more accurate.


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How to read check engine codes on a 1999 chev 1500 suburban.


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A potentiometer is a variable resistor, while a voltmeter is a device that measures voltage.


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Alternator not charging battery sufficiently? Check with a voltmeter: A fully charged battery should read approx. 12.8 volts without engine running. With engine running should read approx. 13.8-14.2 volts


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To measure electrical voltage accurately using a voltmeter, first ensure the voltmeter is set to the appropriate voltage range. Connect the voltmeter in parallel to the circuit or component you want to measure. Take note of the polarity and read the voltage displayed on the voltmeter. Make sure to account for any decimal points or units displayed.