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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (Lighting System) >> Diagnostic Information and Procedures >> DTC B3890 >> Circuit/System Description
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Circuit/System Description

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

The trailer brake control module will receive a serial data message from the BCM indicating that the vehicle backup lamps have been activated. The trailer brake control module will then apply system voltage to the trailer backup lamps through their respective voltage supply circuits.

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