Pinpoint Test D: The Wipers Stay On Continuously - Rear Window

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

D1 CHECK THE MULTIFUNCTION SWITCH
- Ignition OFF.
- Disconnect: Multifunction Switch C202.
- Carry out the Multifunction Switch Component Test.
  Refer to COMPONENT TESTING (Except Hybrid), COMPONENT TESTING (Hybrid) for component testing.
- Did the multifunction switch pass the component test?
- Yes: GO to D2 .
- No: INSTALL a new multifunction switch. REFER to STEERING COLUMN MULTIFUNCTION SWITCH .
D2 CHECK CIRCUITS CRW20 (GY/YE) AND CRW21 (YE/VT) FOR A SHORT TO GROUND
- Disconnect: Rear Window Wiper Motor C476.
- Measure the resistance between ground and rear window wiper motor:
  - C476-3, circuit CRW20 (GY/YE), harness side.
  - C476-7, circuit CRW21 (YE/VT), harness side.
    
    Fig 1: Checking Circuit(s) In Question
    Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?
- Yes: GO to D3 .
- No: REPAIR the circuit(s) in question. TEST the system for normal operation.
D3 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: INSTALL a new rear window wiper motor. REFER to WIPER MOTOR - REAR WINDOW .
- 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.