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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 239 (Wiring Systems And Power Management - DTC B1428 To DTC B1433) >> DTC B1428 >> Circuit/System Description

Circuit/System Description

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The body control module (BCM) controls the Run/Crank relay through the run/crank relay coil control circuit by applying voltage to the circuit. The Run/Crank relay is energized when the ignition switch is in ON or START, or when a remote start is requested.

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