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HOMESERVICE MANUALSFORD1993PICKUP F250, 2D PICKUP, 5.0 N, STANDARD, M5OD-R2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 24 (ENGINE CONTROLS - SYSTEM/COMPONENT TESTS - GASOLINE)DI SYSTEMDIAGNOSTIC AIDS
1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2

Diagnostic Aids

1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2SECTION Diagnostic Aids
WARNING: This page is about a different car, the 1994 Ford RV Cutaway, 1994 Ford Econoline, 1994 Ford Cutaway, and 1994 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.

Major difference between Computer Controlled Dwell (CCD) and non-CCD systems is CCD system does not receive a start signal from ignition switch at ICM (terminal No. 4) during engine cranking. CCD systems send an additional coil negative (-)/tach circuit signal to PCM from ignition module (terminal No. 4). See Fig 1 . Following information should be noted during testing:

  • All voltage readings given in test procedures are based on values obtained using a standard DVOM such as Rotunda (007 -00001) or Fluke (20 or 70 Series). DO NOT use RMS type meter.
  • When instructed to inspect a wiring harness, perform both a visual inspection and a continuity test.
  • When making voltage checks, ground connections should be made at negative battery terminal or cast iron surface of engine.
  • When making measurements on a wiring harness or connector, perform a wiggle test while measuring.
  • When checking voltage, ground reading is defined as value of less than one volt. Battery voltage is defined as value of 10-14 volts.
  • Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to TESTS W/O CODES article in the ENGINE PERFORMANCE section.
Fig 1: Remote Mounted ICM Terminal ID
G93F76500Courtesy of FORD MOTOR CO.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.