Random thoughts - blinkers

[cj847]

I am confused on why/how my blinkers suddenly quit working. They worked one day 100% then the next day nothing. I checked all the fuses and "easy" stuff and found no smoking gun.
Let me know if you have some ideas.

Now for my random musings. I decided to review the entire circuit, which meant I had to understand where the electrons are going. This is what I think happens or is supposed to happen:

-12V key on power goes thru the flasher and into the purple wire which goes to the switch. I confirmed this at the column connector with a multimeter and a light bulb.
-Thru meshing of contacts the power goes to the various wires to the blinker filaments (yellow, green, lt blue, dk blue).
-My problem is the purple wire has power but when you move the switch nothing happens. (no continuity to any of the blink light wires.)
-Then I went and got an old blinker switch from another truck that had failed. I tore it apart to see where the magic happens. The assembly is such that there is really nothing to go wrong. It is just brass on brass contact. The nubs could wear out over time but I'm doubting that could happen overnight.



Now that I've studied this stuff I've confused myself and I have some questions for any experts out there.
I understand the purple wire powering the blinkers before you hit the brake. But when you hit the brake 12v+ comes in via the white wire from the brake switch. This is 12V that has not been thru the flasher. Does this only power the light on the non-blinking side?


PS> Here are some pics for anyone who wants to geek out with me.