Check Engine Lamp
See
Figure 1. The engine check lamp is located inside the instrument cluster. Its purpose is to indicate whether or not the engine/engine management system is operating normally. The engine lamp color is red.
The engine lamp normally comes on when the bike's ignition is first turned on and remains on for approximately 4 seconds, as the engine management system runs a series of self-diagnostics.
If the engine lamp comes on at any other time, see a Harley-Davidson dealer.