Hi all, this is my first post so apologies if I didn’t ask this in the correct category.

I have a 2016 F150 sport with the 2.3 eco boost. For the last few months my passenger side front turn signal has not been working. I replaced the bulb with a new one but it didn’t fix it and actually the original bulb was fine. Randomly the blinker will go back to working normally which leads me to believe maybe I have a short somewhere?

for reference I have a set of aftermarket headlights installed but they use the factory turn signal and wiring harness. My question is is this a turn signal switch issue or could it be in the wiring? Any suggestions as to where I should start looking first?