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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC B1420 >> Circuit/System Description
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Circuit/System Description

The body control module (BCM) monitors the battery voltage on the battery voltage signal circuit. Damage to components, and incorrect data may occur when the voltage is out of range.