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Home >> Ford >> 1983 >> Bronco 5.0 F, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - DURA-Spark III >> Testing >> Run Circuit Check

Run Circuit 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 coil wire and engine ground.
    Fig 1: Ignition Diagnostic Test Adapter and Spark Tester Hook-Up for Run Circuits Check Spark should occur at tester, when lead is touched to battery positive terminal.
    G9999
  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 "OFF", 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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