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Pinned How do I test my 12 Volt battery and charging system?

Discussion in 'Tech Tips' started by GreyImport, Dec 2, 2013.

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  1. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Static Battery Voltage Test

    • Prior to conducting this test, make sure the battery has not been recently charged. You must wait at least one hour after charging your battery to conduct this test.
    • Adjust voltmeter (multimeter) to DC volts (20 volt range).
    • Place voltmeter leads to the battery terminals. (positive to positive and negative to negative)
    • Read voltage and refer to the chart below.



    battery.png



    Starting Load Test
    • Adjust voltmeter to DC volts (20 volt range).
    • Place voltmeter leads to the battery terminals. (positive to positive and negative to negative)
    • Watch the voltmeter as you start your motorcycle.
    • If the voltage drops below 9.5 volts, the battery has very low capacity and should be replaced.
    Charging System Test
    • Adjust voltmeter to DC volts (20 volt range).
    • Place voltmeter leads to the battery terminals. (positive to positive and negative to negative)
    • Start your motorcycle.
    • Bring engine RPM's up to approximately 3,000
    • Compare the voltage reading to the specification in your owner's manual.
      (Note: the voltage reading should be approx. 14.0 - 14.5 volts to properly charge an AGM battery.)
     
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