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Home >> Mercury >> 1982 >> Capri Black Magic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Ignition System >> MOTORCRAFT DURA-Spark III Ignition System (EEC) >> Testing >> Run Circuits Check

Run Circuits Check

  1. Disconnect ignition module 3-wire connector and install ignition diagnostic test adapter (T79P-12127-A or equivalent) as shown in Fig 1. Disconnect ignition coil wire from distributor and connect spark tester to wire and engine ground.
    Fig 1: Ignition Diagnostic Test Adapter and Spark Tester Hook-Up for Run Circuits Check
    G09316163Courtesy of FORD MOTOR CO.
  2. Turn ignition switch to "RUN" position and touch diagnostic adapter lead to positive battery terminal. Sparks should occur at tester gap each time lead touches battery terminal. Turn ignition switch to "OFF" position, remove spark tester and remove ignition diagnostic test adapter. Reconnect all wires.
  3. If sparks occurred at tester gap, proceed to "START CIRCUITS CHECK ". If no sparks occurred at tester gap, proceed to "IGNITION COIL PRIMARY CIRCUIT SWITCHING CHECK ".
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