When my turn signals stop working i my ‘69 or ‘71, i just have to use the hazard switch a time or two and blinkers magically work again. Not sure if your year has similar wiring, but worth a try for sure! Easiest fix ive ever had to do.Drained the transfer case, fixed it’s leaks, and refilled it, then replaced the reverse light switch in the transmission. I can finally see backing up at night!
Next up is figure out why my turn signals have stopped working