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Home >> Cadillac >> 2018 >> XT5 Platinum >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting System - Diagnostic Information And Procedures (DTC B3950 - C0297) >> Diagnostic Information and Procedures >> Exterior Courtesy Lamps Malfunction >> Circuit/System Description

Circuit/System Description

The body control module (BCM) supplies battery voltage to each exterior door handle LED backlighting for approach lighting. When the keyless entry transmitter is operated to the lock/unlock functions the exterior door handles LED's for approach lighting are commanded ON.

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