Pinpoint Test G: The Windshield Wiper Speed Dependent Interval Mode Does Not Operate Correctly

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.

Test Step

G1 CHECK THE ABS - MONITOR THE VSS
- Monitor VSS while driving the vehicle from 0 to 88.5 kph (55 mph).
- Does the VSS agree with the ABS PIDs?
Result / Action to Take
- Yes : GO to G2.
- No : REFER to ANTI-LOCK CONTROL .
G2 CHECK CIRCUIT 679 (GY/BK) FOR AN OPEN
- Disconnect: ABS C135.
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between anti-lock brake control module C135 pin 21, circuit 679 (GY/BK), harness side and windshield wiper motor C125 pin 4, circuit 679 (GY/BK), harness side.
  
  Fig 1: Checking Circuit 679 (GY/BK) For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to G3.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
G3 CHECK CIRCUIT 679 (GY/BK) FOR A SHORT TO GROUND
- Measure the resistance between ABS C135 pin 21, circuit 679 (GY/BK), harness side and ground.
  
  Fig 2: Checking Circuit 679 (GY/BK) For A Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to G4.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
G4 CHECK FOR CORRECT WIPER MOTOR OPERATION
- Disconnect all wiper motor connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all wiper motor connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : GO to G5.
- No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
G5 CHECK THE WINDSHIELD WIPER MOTOR
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Carry out the windshield wiper motor component test as outlined in this article.
- Did the windshield wiper motor pass the component test?
- Yes : The system is operating correctly at this time. Concern may have been caused by incorrect binding pivot arm adjustment. REFER to WIPER BLADE AND PIVOT ARM ADJUSTMENT in this article. TEST the system for normal operation.
- No : INSTALL a new windshield wiper motor. REFER to WINDSHIELD WIPER MOTOR in this article.