Like many, I too replaced the large FFR front turn signal and accent lights with dual amber and white LEDs, so all 4 can serve as turn signals and accent lights when needed.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
The problem I ran into was turn signals needed to over-ride the accent lights for saftey. So when the turn signals need to blink the white needed to turn off or else it's hard to see the turn signals. The solution was 2 additional relays to interrupt accent lights.
I thought I would share my diagram how I wired them up on a 2003 WRX Sedan. Since the Headlight beam shuts off when the shutter pops on, I also included instructions for that relay as well. If your another year, you may not need it or have slightly different wire colors from the wire harness.
To get lights to function correctly after dieting, I also needed to make 2 splices in the wire harness as shown in the diagram. That's It. I'm not a pro, so look carefully at these connections in case I missed something. I drew these up after I had the headlights installed