[AZKen]

It's pretty simple to trace proper wiring. The turn signal switch is the "router". It gets power from stop switch and from the flasher (probably a 6 wire turnsignal harness). Then it sends flash to right front and rear, flash to left front and rear. If it worked before and you plugged LED flasher into same place as old flasher and you grounded the LED flasher pigtail wire per instructions, then either you messed with wiring somewhere, new flasher is bad or both front lights connected to same turn signal output wire or connected together. I don't know anything about LED bulbs, flashers..so it could be some special LED related problem I guess. But check the wiring as I describe. Follow and recheck all 6 turn signal wires.

The 6 are:
1. flasher input
2. Brake switch input
3. Left output to left front and to dash indicator
4. Right output to right front and dash indicator
5. Left output to left rear light
6. Right output to right rear light

Your trouble with fronts may have something to do with them being park and turn. Make sure the park circuit is not mixed with turn circuit. Assume you have dual filament bulbs front and back.