Pinpoint Test H: The Yellow Anti-lock Brake System (ABS) Warning Indicator is Always On: Testing

2005 Ford Taurus SEL, 4D SedanSECTION Testing
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 CHECK FOR DTCs 
    • Connect the diagnostic tool.
    • Key in ON position.

      Retrieve the ABS module DTCs.

    • Any DTCs present? 
  2. H2 CARRY OUT THE INSTRUMENT CLUSTER ABS WARNING INDICATOR ACTIVE COMMAND 
    • Enter the following diagnostic mode on the diagnostic tool: Instrument Cluster Active Command.
    • Command all warning lamps ON then OFF.
    • Does the yellow ABS warning indicator continue to illuminate? 
    • Yes  : GO to H3.
    • No  : GO to  H4.
  3. H3 CHECK FOR CORRECT INSTRUMENT CLUSTER MODULE OPERATION 
    • Disconnect the instrument cluster connector.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect the instrument cluster connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . CLEAR the DTCs. REPEAT the self-test.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
  4. H4 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect the ABS module connector.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect the ABS module connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . CLEAR the DTCs. REPEAT the self-test.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.