For testing an ignition coil, you first have to know how to test an ignition coil. The broad description of an ignition coil’s operation shows that one of the simplest ways to test an ignition coil is to check the resistance of the primary and secondary coils using a multimeter. These resistances should however be measurable within the bounds of the limits given by the coil manufacturer for correct functioning. Checking if ignition coil provides adequate sparking can be done using a spark meter and checking if any sparks at all are produced. Severe damage may also be assessed by simply looking for burns and cracks. Regular maintenance of ignition coils can help prevent problems with the engine performance by detecting their faults early.