Pinpoint Test A: The Wipers Are Inoperative - Windshield

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

A1 CHECK CIRCUITS SBB58 (YE/RD) AND CBP45 (YE) FOR VOLTAGE
- Ignition OFF.
- Disconnect: Windshield Wiper Motor C1552.
- Ignition ON.
- Measure the voltage between ground and windshield wiper:
  - C1552-5, circuit SBB58 (YE/RD), harness side.
  - C1552-8, circuit CBP45 (YE), harness side.
    
    Fig 1: Checking Circuits SBB58 (YE/RD) And CBP45 (YE) For Voltage
    Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
- Yes: GO to A2 .
- No: VERIFY that Battery Junction Box (BJB) fuse 58 (30A) and Smart Junction Box (SJB) fuse 45 (5A) are OK. If OK, REPAIR the circuit (s) in question. If not OK, REFER to the SYSTEM WIRING DIAGRAMS for Edge or SYSTEM WIRING DIAGRAMS for MKX to identify the possible causes of the circuit short. TEST the system for normal operation.
A2 CHECK CIRCUIT GD120 (BK/GN) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between ground and windshield wiper motor:
  - C1552-3, circuit GD120 (BK/GN), harness side.
  - C1552-6, circuit GD120 (BK/GN), harness side.
    
    Fig 2: Checking Circuit GD120 (BK/GN) For An Open
    Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes: GO to A3 .
- No: REPAIR the circuit(s) in question. TEST the system for normal operation.
A3 CHECK THE MULTIFUNCTION SWITCH
- Disconnect: Multifunction Switch C202.
- Carry out the Multifunction Switch Component Test.
  Refer to COMPONENT TESTING for component testing.
- Did the multifunction switch pass the component test?
- Yes: GO to A4 .
- No: INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
A4 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN
- Measure the resistance between multifunction switch C202- 15, circuit GD116 (BK/VT), harness side and ground.
  
  Fig 3: Measuring Resistance Between Multifunction Switch C202- 15, Circuit GD116 (BK/VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A5 .
- No: REPAIR the circuit. TEST the system for normal operation.

A5 CHECK FOR SHORTS IN THE WINDSHIELD WIPER MOTOR HARNESS

Measure the resistance between windshield wiper motor C1552, harness side, using the following chart:

RESISTANCE SPECIFICATION

Windshield Wiper Motor	Circuits	Windshield Wiper Motor
C1552-10	CRW19 (BU/OG)/CRW08 (VT/OG)	C1552-1
C1552-10	CRW19 (BU/OG)/CRW17 (BN/VT)	C1552-9
C1552-10	CRW19 (BU/OG)/CRW18 (VT/WH)	C1552-11
C1552-11	CRW18 (VT/WH)/CRW08 (VT/OG)	C1552-1
C1552-11	CRW18 (VT/WH)/CRW17 (GN/VT)	C1552-9
C1552-1	CRW08 (VT/OG)/CRW17 (GN/VT)	C1552-9

Fig 4: Checking For Shorts In Windshield Wiper Motor Harness

Courtesy of FORD MOTOR CO.

Is the resistance greater than 10,000 ohms for all measurements?

Yes: GO to A6 .
No: REPAIR the circuit. TEST the system for normal operation.

A6 CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION
- Disconnect all windshield wiper motor connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect all the windshield 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 windshield wiper motor. REFER to WIPER MOTOR - WINDSHIELD .
- 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.