No Headlights 2.0

Have had no electrical problems for a year now with the 67 Barrcuda.
When I had the dash apart to replace the dash bezels , I did attempt to put in a new headlight switch.
**But, after several hours trying, I never could get the stem to come out. So, I just put the old switch back in.
(It looked to be in good condition; and worked well.)

So heading to our annual car show this past weekend, I washed the engine bay (which I have done several times before).
That next morning - NO HEADLIGHTS! :eek:
So, I am just beginning to trouble shoot why.
I saw this diagram on a similar recent thread, and it helps understand what to look for.
My detailed colored wiring digram is not much help.

Poer Diagram A.jpg

So, I wil start by checking things like the headlight ground on the passenger side; and power to the sockets.
From what I can see on the diagrams, and have read, there is NO headlight fuse. The headlight power comes directly off of the "welded splice".
All the other headlight switch functions work.
And, if the fusable link was the problem, I would have more things that do not work, like the ignition switch.

I did read somewhere that even a bad contact in the floor dimmer switch might also be a cause.
Any other thoughts??