Article: This is where wiring comes in from the ignition module. If you observe no current then your pulse generator has likely malfunctioned.  If this is the case you will need to replace it. If you observe a current then your pulse generator is likely operating properly. This may indicate that your ignition module is not functioning and you must replace it. If all other components are functioning properly and there are no breaks in your wiring system, then you may have a bad ECM.  At this point you should consider taking your vehicle to a professional to diagnose the problem.
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Locate the pulse generator on the distributor. Connect an A/C voltmeter to the pair of wires at the pulse generator and crank the engine. Suspect the ECM as a last resort.