Blinker Issue

[markrieb]

Background:

Just installed a new Ron Francis 24/7 wiring harness. Replaced the front turn signal sockets with new sockets (not just the spring and pins), extra ground from the socket to the grounding backbone, Super-Brite LED 1157 amber bulbs, new headlight switch, rear tail lights are Digi-Tails full panel replacement LED lights.

What works: Headlights work fine; front marker lights work fine; rear tail lights work fine; rear brake lights work fine

What doesn't work: turn signals... If I engage a turn signal, both the front and rear lights on that side light up but do not blink. Both the left and right side does this.

What I've tried: three different LED rated flashers, swapping the flasher fuse and relay, no changes

What I need: Any hints on where to start troubleshooting next?