40 year old wires

Hello,
I am not a super genius when it comes to the electrical system in my car, house yes, car no. The other day something wacky happened: the lights went haywire. When you turned the lights on the turn signals would not work, when you hit the breaks you also lost the flashing of the signals. I replaced the flasher fuse. Seemed to do the trick, but then for no reason the reverse lights would not work and when the car was sitting idol with her lights on the tail lights started to blink, along with the interior light.
Is my car possessed?
I checked all the visible lines and fuses, and everything looked in good working order.
I did find a short in the Fusible Link, could this be the source of my problems? Or would it be someplace else?
Where can one find a good diagram that I, a not so super genius, could understand in order to rewire the car. (65 Valiant Wagon)

Thanks!