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Primary Circuit Continuity

  1. Disconnect wiring harness connector from ignition module. Inspect connector for dirt, corrosion or damage. Repair if necessary. Connect negative voltmeter lead to distributor base and measure voltage at battery.
  2. With negative voltmeter lead still connected to distributor base, insert positive lead into connector terminal No. 2. See Figure. Place ignition switch in "RUN" position and measure voltage at terminal No. 2.
  3. If reading is 90% of battery voltage, turn ignition off. Proceed to WIRING HARNESS  test. If reading is less than 90% of battery voltage, turn ignition off. Connect wiring harness. Proceed to IGNITION COIL PRIMARY VOLTAGE test.
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