Symptom Chart

2005 Ford Taurus SEL, 4D SedanSECTION Symptom Chart
WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART

Condition Possible Sources Action
  • No communication with the trailer brake control (TBC) module
  • Central junction box (CJB) fuse(s):
    • 20 (15A)
    • 28 (10A)
    • 101 (30A)
  • Circuitry
  • TBC
  • The TBC module LED display does not illuminate and the trailer brakes are inoperative
  • Central junction box (CJB) fuse(s):
    • 20 (15A)
    • 28 (10A)
    • 101 (30A)
  • Circuitry
  • TBC module
  • Customer trailer
  • Anti-lock brake system (ABS)
  • The trailer brakes are inoperative
  • Central junction box (CJB) fuse(s):
    • 20 (15A)
    • 28 (10A)
    • 101 (30A)
  • Circuitry
  • TBC module
  • Customer trailer
  • The trailer brakes are always engaged
  • Circuitry
  • TBC module
  • Customer trailer
  • The message center intermittently displays "TRAILER DISCONNECTED" or "CHECK TRAILER" while towing a trailer
  • Circuitry
  • Customer trailer
  • The instrument cluster displays "TBC FAULT"
  • DTCs present
  • Central junction box (CJB) fuse(s):
    • 20 (15A)
    • 28 (10A)
    • 101 (30A)
  • Circuitry
  • Instrument cluster
  • TBC module
  • The instrument cluster displays "TRAILER FAULT"
  • Circuitry
  • TBC module
  • With out  a trailer connected to the trailer tow connector, GO to PINPOINT TEST D .
  • Customer trailer
  • With  a trailer connected to the trailer tow connector, SEND the trailer to an authorized camper/trailer repair center.
  • The TBC module manual control lever knob is missing
  • Missing control lever knob
  • INSTALL a new control lever knob.
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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.