Turn Signals stoped working

I just replaced my old wiring harnesses on my 1965 barracuda because of age. Everything was working just fine when suddenly my directional lights stoped working as I was putting the Steering column back into place. All the other lights are working fine. Brake lights, parking lights stop lights, headlights along with the dash and interior lights. I replaced the flasher thinking that might be the problem, but no luck, All to lamps have been converted to LED's and again never had an issue. I'm thinking of replacing the directional light switch along with that wiring as well. By the way the horn is still working just fine as well.
Anyone have any thoughts as to how to proceed or what testing procedures I might try.
I know there is always great information from everyone here.
So thanks in advance

Bill Kane