Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
DTC B260D 02
The BCM detects a short to ground in the left daytime running lamp control circuit.
DTC B260E 02
The BCM detects a short to ground in the right daytime running lamp control circuit.