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Module-To-Coil Wire Check

  1. Separate control module 4-wire connector from ignition coil connector. Attach an 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. Attach to harness connector terminal that mates with Green wire and measure resistance. If wire shows any resistance, check wiring harness for short circuit.
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