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Ground Circuit Continuity Check

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