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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Mirrors) >> Diagnostic Information and Procedures >> DTC B1640 or B1645 >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

When the DDM and PDM supply battery voltage to the mirror heating element supply voltage circuit and its shorted to ground.

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