69 Cuda wiring problem

So I’ve installed all of the lights inside and out and everything works correctly, except the turn signals and emergency flasher. I’m using modern hi-power leds in these locations. Can that have anything to do with it? Thanks for the help.
There you go. LEDs need electronic flashers (identified by a separate pigtail on the flasher unit that goes to ground) in order to work. Search the electrical threads for part numbers and recommendations.