vid1900, once again I seek your wisdom.
In your early Bally diagram, you show your line filter having line coming in on the top, load coming out the bottom. Out the line side, you can see the BLUE wire connects to WHITE on the wiring harness, and the BROWN wire connects to BLACK on the wiring harness. Here's your photo:
In my 1979 Bally Future Spa, you can see it looks almost exactly alike...except: Note that the BLUE wire coming out the left LINE side of the filter connector connects to BLACK, and the BROWN wire coming out the right side of the filter connects to WHITE:
I'm now replacing the power cord, the line filter, the varistor. Here is where I am now:
You can see I have white/neutral coming in on the left, black/hot coming in on the right, ground in middle... but now I'm a little nervous about where to put the black and white leads coming out the other side. My instinct says black to black, white to white, but the color mixup above makes me less confident. Thoughts?