Pinpoint Tests AZ: PSCM DTC U0252 Lost Communication With Lighting Control Module - Rear "B": Notes
WARNING: This page is about a different car, the 2020 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The lighting control module - rear "B" (RLCMB) is also known as the trailer module (TRM) or the trailer tow module.