Open the distributor cap Put a thin piece of plastic between the points to keep them open. Pull the coil wire out of the center of the distributor cap tape it with any tape so the metal of the wire is 1/8 to 3/16" away from a ground (engine block) Turn on the ignition Use a plastic handled screw driver to short the terminal on the side of the distributor to the distributor case. As this connection is made and broken, the coil should make a nice blue spark to the block. If yes, it is a good coil. If no see if the screw driver itself is making a tiny spark. if no, disconnect the wire from that distributor terminal and (holding the insulation) touch it to ground. If nothing sparks at all, (the little wire, or spark wire, check to make sure there is voltage to the Switch side of the coil. If there is 6v there, scrap the coil. If no 6 volts, run a temporary wire from the battery non ground terminalto the coil switch side and repeat the experiments. If nothing, junk the coil. If it works now the switch or wires are open and not feeding volts to the coil. JimN
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