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Ground Circuit Continuity

  1. Insert a small straight-pin in control module Black wire. DO NOT  allow straight-pin to contact ground. Attach voltmeter negative lead to distributor base and positive lead to straight-pin in Black wire. With ignition switch in "RUN" position, measure voltage.
  2. If voltage reading was greater than .5 volt, proceed to DISTRIBUTOR GROUND CIRCUIT CONTINUITY  test. If voltage was .5 volt or less, replace control module. After test, remove straight-pin.