I dont think you do
if you look at Greggers pictures you can see he still has BULBS in the system so his wil flash correct.
I had led`s on mine for a while but needed load equalizers in it (mine are fitted under the seat stuck on the rear guard)
As a trouble shooting suggestion get one of your old BULB indicators and hook it into either the right or left side and try it then, if it flashes it is a LOAD issue, if nothing changes then its a wiring issue.
If it flashes fast then you will need equalizers.. let us know how you get on
