If you're measuring the output voltage of the secondary with the coil primary energized, you won't get the high voltage that fires the spark plugs. That only happens when the coil primary windings are de-energized (points open) making the magnetic field collapse quickly and inducing the high voltage spike in the secondary. And it only lasts less than a second. It's possible that the secondary windings are open circuit.


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.