2004 FXDLI. When cold I start bike up and engine light goes out. Comes back on then it flashes off and then back on again. Ride down the road a mile or so and after bike warms up light goes out. If I stop and restart with the engine warm. Light comes on for few seconds and stays off. Does n't make sense to me. Other than that bike runs just fine. Any ideas. Haven't tried running codes yet. Sort of hesitant as I am familiar with electronics.