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Silverado charging issue
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<blockquote data-quote="swampratt" data-source="post: 3103062" data-attributes="member: 15054"><p>Take a multi meter and with the truck turned of check battery voltage. say it is 12.7 volts.</p><p>Now start the vehicle.. look at the multi meter it should be more than your initial 12.7 volts.</p><p>Now rev it up to about 2500rpm. It should again be more than 12.7 if it drops below that voltage you are running on battery voltage and the alternator is not keeping up.</p><p></p><p>Now turn on the headlights the AC to high and the hazzards.</p><p>This will put a load on the alternator.. the voltage should still be above battery initial voltage.</p><p></p><p>Like 918evo stated 13.8 is more like what you should see but I will say my alternators read higher 14.3 to 14.7 on my GM old school alternators.</p></blockquote><p></p>
[QUOTE="swampratt, post: 3103062, member: 15054"] Take a multi meter and with the truck turned of check battery voltage. say it is 12.7 volts. Now start the vehicle.. look at the multi meter it should be more than your initial 12.7 volts. Now rev it up to about 2500rpm. It should again be more than 12.7 if it drops below that voltage you are running on battery voltage and the alternator is not keeping up. Now turn on the headlights the AC to high and the hazzards. This will put a load on the alternator.. the voltage should still be above battery initial voltage. Like 918evo stated 13.8 is more like what you should see but I will say my alternators read higher 14.3 to 14.7 on my GM old school alternators. [/QUOTE]
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