Y-Harness - Brake/Turn Signal Works in conjunction with the SMART Turn Signal Controller and Dual Color Amber/Red 1157 rear turn signals part # 2020-1995 (sold separately) to feed brake signal to any 3-wire (red non-sequential) lighting product so that a separate Strobes* Brake Light Flasher part # 2050-0223 (sold separately) can be installed to provide brake light flash/strobe pattern to those 3-wire products that are otherwise not affected by the SMART Turn Signal Controller, Plug and play