[Tom Wesenberg]

I just had an email about having no spark, so I'll repeat what I told the man:

Use a test light to see where the voltage stops. With the key off you should have 6 volts on both coil terminals and on the wire from the coil to the switch. With the key on and points closed you should have ground on one side of the coil, both sides of the switch, and both sides of the points contacts. If the test light is lit on one side of the switch but not the other side, then the switch is turned off or it's bad if it's turned on. If the test light is lit on the movable points contact, but not the ground contact, then the points need to be cleaned. If the light is lit on both points contacts, then the distributor needs to be grounded. If the wire is screwed too far into the distributor, then it can ground out the lower plate bus bar.

If the points are open and the key is ON, then you should have voltage all the way to the movable points contact.