No turn signal w/ headlights on

Hello everyone,

I purchased my first ever truck in June, 2013 Tundra. Love it. Previous owner did several mods which I appreciate.

Noticed an issue the other day, my front right turn signal does not work when my headlights are turned on. The amber light does not blink and there is a loud humming coming from that headlight. My driver side headlight is completely white, no amber light at all, but the turn signal turns amber and works - no issues there. Looks like they are amber LEDs, and also looks like previous owner installed a resistor to fix the hyper flash issue. I am confused and I am not much of a car person, trying to learn, I know bringing it to a shop will cost me. I want to try to figure it out on my own, I have a seen one post with similar issues but did not see a resolution. Any help would be greatly appreciated - I am going to continue my search for a solution. Thanks!

-- included pictures bc I am not sure I explained it very well. One picture - headlights on with passenger blinker on - no blinking, just humming. Other picture is just parking lights on with one amber, one white.

 

looks like switchbacks to me... try replacing the bulbs with stock signal bulbs.. my guess is that will work... if you want to retain the switchback function, maybe youll just need a new set of bulbs

 

Booya might be correct. The only other thing that sprung to mind was the flasher under the dash, but I don't know what's working and what's not. When I put my XBs in my 16, it didn't properly "switchback" without assistance from the new flasher. I previously had halogen DRLs.