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Module Run Circuit Check

  1. Insert a straight pin through red wire of ignition module 2-wire harness (between module and connector). See Fig 1. Attach positive lead of voltmeter to straight pin and negative lead to a good engine ground. Do not allow straight pin to contact ground.
  2. Turn ignition switch to "RUN" position, take reading and turn switch "OFF".
  3. If reading is at least 90 percent of battery voltage, proceed to "Module Start Circuit Check ". If reading is below 90 percent, proceed to "Wiring Harness Shorts Check ". Service and replace wires, as necessary.
    Fig 1: Checking Control Module Run and Start Circuits with Voltmeter
    G09318006Courtesy of FORD MOTOR CO.
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