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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 890 (Four-Wheel Drive Systems (ESOF) - F250-F550 Super Duty) >> Diagnosis And Testing >> Four-Wheel Drive Systems - Electronic Shift >> Symptom Chart - Electronic Shift

Symptom Chart - Electronic Shift

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART - ELECTRONIC SHIFT

Condition Possible Sources Action
  • No communication with the 4WD control module
  • 4WD control module (GEM).
  • Central junction box (CJB).
  • CJB fuse 34 (10A), 45 (10A), 33 (10A).
  • Circuitry.
  • The vehicle does not shift between 2WD and 4WD correctly
  • CJB fuse 59 (30A), 27 (15A).
  • Mode select switch (MSS).
  • Transfer case shift relays.
  • Contact plate A, B, C, or D.
  • Gearmotor encoder assembly.
  • Circuitry.
  • 4WD control module (GEM).
  • Transfer case mechanism.
  • The vehicle does not shift between 4x4 and 4x4 LOW modes correctly
  • CJB fuse 59 (30A).
  • MSS.
  • PARK/NEUTRAL position switch.
  • Brake pedal position (BPP) switch.
  • 4WD control module (GEM).
  • Transfer case.
  • Anti-lock brake control (ABS) module.
  • Circuitry.
  • The front axle does not engage correctly
  • CJB fuse 27 (15A).
  • Pulse vacuum hublock (PVH) solenoid.
  • 4WD control module (GEM).
  • Circuitry.
  • Vacuum lines.
  • Hublocks.
  • Hub and bearing.
  • The 4x4 indicator is always on - four-wheel drive system operates correctly
  • ABS module.
  • Circuitry.
  • Instrument cluster.
  • 4WD control module (GEM).
  • The 4x4 LOW indicator is always on
  • PCM.
  • Circuitry.
  • Instrument cluster.
  • 4WD control module (GEM).
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