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Home › Mercury › 1986 › Capri Base, 5.0 F › Repair and Diagnosis › Engine Performance › Ignition System › Ignition System - TFI › Testing › Ignition Coil Primary Resistance Check

Ignition Coil Primary Resistance Check

  1. With ignition switch in "OFF" position, disconnect ignition coil connector. Connect ohmmeter leads to positive and negative terminals of ignition coil. Measure resistance.
  2. If resistance was .3-1 ohm, proceed to IGNITION COIL SECONDARY RESISTANCE CHECK . If resistance was less than .3 ohm or greater than 1 ohm, replace ignition coil.
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