Navigator 2WD V8-5.4L SOHC VIN L (1999)
Wheel Speed Sensor: Customer Interest
ABS - Lamp ON/False ABS Cycling/High Brake Pedal Effort
Article No.
99-13-13
06/28/99
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ANTI-LOCK BRAKE SYSTEM (ABS) - ABS LAMP
ILLUMINATED - 4X2 ONLY
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ANTI-LOCK BRAKE SYSTEM (ABS) - FALSE ABS
CYCLING AT LOW SPEEDS - 4X2 ONLY
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ANTI-LOCK BRAKE SYSTEM (ABS) - INCREASED
BRAKE PEDAL EFFORT AT LOW SPEEDS - 4X2 ONLY
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LAMP - ANTI-LOCK BRAKE LAMP ILLUMINATION -
INCREASED BRAKE PEDAL EFFORT AND/OR
FALSE ABS CYCLING AT LOW SPEEDS - 4X2
ONLY
FORD:
1997-1999 EXPEDITION, F-150, F-250 LD
LINCOLN:
1998-1999 NAVIGATOR
This TSB article is being republished in its entirety to state coverage for 4X2 vehicles only and revise Figure 1.
ISSUE
Increased brake pedal effort and/or false Anti-lock Braking System (ABS) cycling at low speeds, or ABS lamp illumination may occur on some vehicles.
This may be caused by an incorrectly installed front wheel speed sensor, low vacuum in the brake booster, or a chipped or broken tooth on the tone ring
resulting in reduced output to the ABS Electronic Control Unit (ECU).
ACTION
Be sure the front wheel speed sensor is properly installed and the wires are properly routed. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
1
Retrieve and record any ABS diagnostic trouble codes and follow procedures detailed in the appropriate Service or Workshop Manual.
