Marker bulb not working

My 13' Tundra marker bulbs will not work. Recently, both my marker bulbs burnt out one after the other. So i replaced both the light sockets (from Toyota dealer) and bulbs. Now both bulbs will not work. I replaced them with LED bulbs and they will not work. I then replaced them with regular stock marker bulbs and still will not work. However, both blinker bulbs work and are LED bulbs. I checked every fuse and none are blown, they are all good. What could the problem be before I take my truck to the dealer?

 

You’re talking about the just the 168 bulbs on the outboard sides of the headlights?

Tail lights and license plate lights working?

 

Yes, the 168 bulbs on the outboard sides of the front headlights. All the other lightbulbs, taillights, taillight blinkers, running lights all work and blink as designed. However, I just started my truck and now the left side marker bulb (168) is litup but won't blink. As for the otherside it just won't light up nor blink. It's annoying cz my truck is well maintained.