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Message: <blockquote data-quote="FordTechOne" data-source="post: 1984200" data-attributes="member: 35543"><p>You may be chasing a ghost. If there is a charging system fault there will be warning messages in the instrument cluster accompanied by DTCs. The charging system is module controlled; it regulates voltage based on load, operating conditions, and battery state of charge. Voltage will vary between 11.X and 14.5 as dictated by the charging strategy. 12.6V is a fully charged battery; it’s normal to see a reading below that after the truck has sat.</p></blockquote><p></p>