Turn signal fun

recently I've been working on a lot of the gauge wiring on my 1968 Plymouth Valiant and I’ve discovered a problem. For the longest time my turn signals had no problem operating and I was getting power to the proper wires depending on what direction I clicked the signal into. However as of recently, signals are dead. No power to the wires, no fuses blown, but both signals don’t operate. Any ideas of where I could start? Been struggling for a couple days now to figure out what’s wrong. Thanks in advance. :)