Front blinkers not working

[andrewpclayton]

Hi everyone..
I have a new to me column from another 69 in my truck after the auto trans conversion. All is working except the front marker turn signal lights. (Don’t have bulbs in the sides as I’m going to fill those holes)
With headlights on, the lights come on solid, but with headlights on or off they do not blink with blinker.
Previously the left side only worked with right side coming on solid only. Then I tried my hazard lights, nothing worked and the blinkers no longer worked on left.
So I got a brand new flasher, and now I’m here with only rear blinkers. 1157 bulbs.

The rear both work fine. What should I check first?