Also recalled in CanadaThe official notice
Defect
Chrysler (FCA US LLC) is recalling certain model year 2014-2016 RAM ProMaster vehicles manufactured July 24, 2015, to February 15, 2016, and 2015-2016 ProMaster City vehicles manufactured August 15, 2014, to February 1, 2016. The Trailer Tow Lighting Control Module may have a software error on the affected vehicles and can prevent illumination of the trailer brake lights during brake actuation. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Assoc. Equipment."
Safety Risk
Trailer brake lights that are inoperative can increase the risk of a crash.
Remedy
Chrysler will notify owners, and dealers will replace the Trailer Tow Light Control Module, free of charge. The recall began on June 20, 2016. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is S22.