I have all LED lights on mine and used the stock wiring and locations for the after market LEDs. They blink at a normal rate and I still have my dash indicator light. All I did was add a load resistor that I hid under my Lic. plate. They make them for HD and was ordered through a friend of mine from Drag Specialties or V Twin or one of those kind of suppliers. I even used the plug from the OEM light soldered to the LED light.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!