Left turn signal issue

May check the front light harness grounds at the radiator support/frame rail area also. I chased a similar issue for years where mine would not light at the front left, but rear blinkers would. By sheer chance, I bumped the harness under hood, while my blinker rod had been Accidentally bumped and was clicked to"left turn", and I saw the fender indicator light up. Tightened the ground bolt, and fixed everything. I just got lucky while not even looking for it.