To add to what bartamos has posted involving the turnsignal switch on top of the steering column
here. Harvested from another site where the poster is working on a 1962 C10 .
Now, you will notice I said brake lights and not turn signals. Well᠁ the turn signals still don’t work at this writing. Turns out there is an odd-ball turn signal switch causing the issue. It sits on top of the steering wheel shaft and not behind the steering wheel as is common. Nope, from 1960-1962 Chevy decided to install a switch on top of the steering wheel column at the base of the column. I’ve tested all the wiring and I’m certain the switch has gone bad. However, it has been back ordered for a few months. What to do? I just point where I plan to turn᠁ through the back window, because, well, the side windows don’t open. It mostly works.
With the turn signal switch on eternal back order it seems, I spliced the wiring to the brake light switch and hooked up directly to the brake lights. I can now drive it around town safely, albeit without turn signals.