No spark

That shows the distributor side that is from coil NEG to ground through the dist. is SHORTED to ground. Under the same conditions, remove the dist wire from coil NEG. Coil POS should then be "same as battery."

Here's how this works. Power (functionally) comes from battery/ harness / ignition switch, and to the ballast resistor, then to the coil POS. With the coil NEG grounded through the points, current flows, dragging the voltalge down through the ballast resistor.

To confirm this, with the points closed, measure again to check, both sides of coil, and both sides of ballast

"Normal" with points closed / key "in run" "key" side of ballast should be very close to same as battery

"Coil" side of ballast ---same as coil POS should be somewhat lower, 8V or so, and

Coil NEG should be very very low.

NOW with points "bumped" around open or blocked open, ALL the voltage test points mentioned should be right up to battery voltage.

If that happens, confirms the dist side is shorted. Examine the dist wire where it goes through the dist case. They can short there. More likely is a mistake at the points connection........wire touching ground, insulator broken, part of it missing, etc, allowing points to ground. it would be rare for a condenser to COMPLETELY short but it could be

And, you MUST have a good condenser to make spark