Points and condenser have been absolute for the past 30 years. I donate my timing light to a museum.

I was a car mechanic many years ago. We would hold a capacitor with insulated pliers and pull of a spark plug lead while the engine was running and make a spark to the capacitor wire. We would then put it down on a wooden bench. Wait for a young appy to come along and ask him to pass it to me. WACK a nice little shock. Always brought a laugh to the shop.

You can also connect capacitor to ignition coil lead & crank engine & capacitor should charge up with voltage from coil discharge. To discharge capacitor just hold with both hands & say arghh , that hurt as the voltage zaps you. Also if capacitor is faulty will cause weak spark output from coil .

Thanks Bob. Simple and to the point 👍

What if the capacitor doesn't show any value, what are symptoms we have in car.

I suspect it would actually work on the other settings but the scale is so compressed that you can't detect the needle movement.

What’s the extra red lead connected to?