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Home >> Buick >> 2012 >> Regal Turbo, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System >> Diagnostic Information and Procedures >> Interior Accent Lighting Malfunction >> Circuit/System Description

Circuit/System Description

The body control module (BCM) uses the ambient light sensor to determine which brightness of the accent light is needed. The BCM applies a pulse width modulated (PWM) voltage through the accent LED control circuit. Depending on the specified lighting requirements, the BCM has three different accent lighting settings:

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