Left LED Turns signals don't work when headlight turned on.
 

69 Chevy C10. Direct wire headlights and LED Tail Lights/turn signals. LED s are about 15 months old.

When I turn headlights on dash shows turn signal on but not blinking. When headlights turned off turn signals work fine.

Any thoughts as to where to start would be appreciated.

Re: Left LED Turns signals don't work when headlight turned on.
 

What kind of flashers do you have on the fuse panel? I ask because I just went thru this with mine (new build) and had to put in LED flashers with a ground to make them work. Also had to use the little black inverter plug they come with.