DTC B1102-12: Trailer Stop Lamp - Circuit short to battery: Action

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2015 Land Rover Range Rover, and 2014 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This DTC may be induced by a fault in the trailer.

Refer to the appropriate system wiring diagrams and check the trailer stop lamp circuit for short circuit to power. Repair the wiring harness as necessary