Thread: Help with 1998 f-150 , will not charge.
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Old 04-20-2009, 01:24 PM
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KingRanchMan02
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When the ignition is off, 12 volts at the battery is normal. When the ignition is on but the engine is not running, battery voltage should be 11 - 12 volts. With the engine running, voltage at the battery should be 13.5 - 15.0 volts.
 
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