I think your grandpa was messing with you. Flashing turn signals and the click sound came with a 1938 invention which Buick started putting into cars in 1939.

I think your grandpa was messing with you. Flashing turn signals and the click sound came with a 1938 invention which Buick started putting into cars in 1939. There were other turn signal approaches used before then, though not all cars had turn signals. Some of those approaches were mechanical, but still don't really align to your grandpa's claim. https://www.qualityplusautomotive.com/blog/2020/september/the-unmistakable-click/ https://www.qualityplusautomotive.com/blog/2020/september/th... https://www.cartalk.com/blogs/jim-motavalli/strange-true-history-turn-signal https://www.cartalk.com/blogs/jim-motavalli/strange-true-his...