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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Lighting Systems) >> Diagnostic Information and Procedures >> Hazard Lamps Malfunction >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The Body Control Module (BCM) controls the hazard lamps based an input from the hazard lamp switch. When the hazard lamp switch is depressed, a ground signal is provided to the BCM on the hazard switch signal circuit. This indicates to the BCM that the hazard lamps are requested. The BCM will then activate the hazards lamps by pulsing the turn signal lamp supply voltage circuits.

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