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Module-To-Coil Wire Resistance Check

  1. Disconnect ignition coil connector from ignition coil and disconnect ignition module 3-wire connector. Connect ohmmeter leads to engine ground and "TACH" terminal of ignition coil connector. Measure resistance. Remove ohmmeter leads and reconnect ignition module and coil connectors.
  2. If resistance was greater than 1 ohm, replace ignition module. If resistance was 1 ohm or less, inspect wiring harness between ignition module and ignition coil.
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