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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 488 (Lighting System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Daytime Running Lamps Malfunction >> Conditions for Running the DTC

Conditions for Running the DTC

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) receives a signal from the ambient light sensor indicating a low or high outside ambient light level. Under daylight conditions the BCM grounds the DRL relay control circuit energizing the DRL relay. The closed relay supplies voltage to the DRLs. Any time the headlamps are illuminated, the DRL will not illuminate.

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