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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1085 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2613: Passenger Compartment Dimming Input Circuit High >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) uses a varying voltage signal from the IP dimmer switch in order to determine the rate of pulse width modulation of the control circuit of the illumination lamps. The pulse width modulation rate determines the brightness of the illumination lamps.

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