Shunting Lights for DCC Locomotives

Digital decoders in model locomotives usually have two outputs for lighting functions. One switches the front lights for forward travel, and the other for reverse travel. If the locomotive has red rear lights, they are also connected to the two outputs. Many digital decoders include function mapping capability, which allows the switch functions to be assigned as desired. For example, with function mapping you can control the lighting not only for normal running, but also for shunting yard operations with the lights lit at both ends of the locomotive.