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Home >> Chevrolet >> 2008 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 1633 (Lighting System) >> Diagnostic Information and Procedures >> DTC B3600 >> Circuit/System Verification
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Circuit/System Verification

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Ignition ON, headlamp switch to HEAD, vary the interior lamp dimming switch from dim to full bright. The I/P lamps should dim and then become full bright.