I've sure looked at the tech tip, as well as successfully installed a 7-wire on my 41. This one is a little different. It is not a Signal-Stat. It comes in a black bakelit housing and needs only 4 wires.
From your description, Dads50, it looks like the flasher is always powered, and the switch only directs the signal left or right. What would keep the indicator from flashing continuously? The better question - how is the flasher itself switched on and off by the column-mounted switch?
This will have nothing to do with the brake lights.
