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Home >> GMC >> 2011 >> Acadia SL, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System >> Diagnostic Information and Procedures >> Hazard Lamps Malfunction >> Circuit/System Description

Circuit/System Description

The body control module (BCM) controls the hazard lamps based on inputs from the hazard switch. With the hazard switch closed, a ground path is provided on the hazard switch signal circuit, indicating a hazard lamp request. When this request is seen, the BCM will pulse the turn signal lamp control circuits, illuminating the turn signal lamps.

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