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Ignition Coil Resistance (Miata)

  1. Disconnect 4-pin connector. Using ohmmeter, measure primary resistance between terminals "A" and "D". See Figure . Resistance should be as specified. See IGNITION COIL RESISTANCE  table. If resistance is not as specified, replace coil.
  2. Using an ohmmeter, measure secondary resistance between terminal "A" and coil tower. See Figure . Resistance should be as specified. See IGNITION COIL RESISTANCE  table. If resistance is not as specified, replace coil.
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