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Home >> Mercury >> 1984 >> Cougar LS, 5.0 F >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - DURA-Spark III >> Testing >> Run Circuits Check

Run Circuits Check

  1. Disconnect ignition module 3-wire connector and install Ignition Diagnostic Test Adapter (IDTA) as shown in Fig 1. Disconnect ignition coil wire from distributor and connect spark tester to wire and engine ground.
    Fig 1: IDTA and Spark Tester Hook-Up for Run Circuits Checks
    G731
  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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