Headlights went off left blinker

this morning driving early in the morning my headlights blinked off when I used my left blinker and then came back on.
What is causing it and what is the fix. This is the first time it happened. My Tundra is a 2015 with only 74000 miles on it.
I am fixing to go on vacation in 2 weeks should I be concerned about it before I leave?

 

@kcaustin66, it could be a number of things. Check that your headlight harnesses are all intact as well as all of your fuses. It could possibly be your multi-function headlight switch. There could be a short or a bad connection. If it were my guess, the latter would be my pick. And to answer your question, yes you should be concerned. There's a chance the headlights wont come back on, not a great place to be in the dark. Good luck and let us know.

 

This is a known issue and there are a few threads about it. Happened to me twice in a weeks time, always when turning left. I have a 2015 platinum with an ihacker harness for 2018 LEDs
I think the issue is the blinker stalk but Toyota hasn't acknowledged the problem as a TSB.....yet

 

This video describes the same issue.

https://www.youtube.com/watch?v=aXvxaeRxRI0

Hope this helps.