LED Bulbs

[JMarsa]

Unless a resistor has been designed into the 1157 bulb, it will need to be added or an electronic flasher unit will be needed. The reason is that LED draw next to no current to run, and incandescent does. The flasher unit will not recognize the bulb unless there is a load, so it will not flash. Hope that helps.

I've had a few basic electronics classes and the bulb itself is considered a resistor. Your right on the other points too.

--JMarsa