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Module-To-Coil Wire Check

  1. Disconnect control module 4-wire connector and ignition coil connector. Connect one ohmmeter lead to distributor base and the other to "TACH" terminal of ignition coil connector.
  2. Measure resistance. There should be no continuity between wire and ground. If continuity exists, check wiring harness for short circuit.
  3. Disconnect ohmmeter lead from distributor base. Connect meter to harness connector terminal that mates with Green wire and measure resistance. If wire shows any resistance, check wiring harness.
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