See
Figure 1. With the vehicle started and in neutral, press and hold the reverse switch in the left side controls until the reverse lamp illuminates. See
Controls and Indicators → Instruments → Instruments: FLHTCUTG. On FLHTCUTG models, the lamp in the tachometer indicates that the reverse is enabled. See
Controls and Indicators → Instruments → Instruments: FLRT. On FLRT models, the lamp in the speedometer indicates that the reverse is enabled. Release the reverse switch. The neutral lamp turns off when the reverse lamp turns on.