Some 2015 and 2016 Mustang vehicles built on or before 4/22/2016 may exhibit a partial outage of the rear tail, turn signal or stop lamps following a vehicle start with a low battery. This may be accompanied by any combination of DTCs B1271, B1272, B1273, B1274, B1275 and B1276. The condition typically clears on vehicle restart. Reprogram the BCMB module to the latest calibration using IDS release 110.01 or higher. Calibration files may also be obtained at www.motorcraftservice.com. Use applicable labor operations from Section 10 of the SLTS manual and use causal part 13C788.
