Pinpoint Test A: The Wipers Are Inoperative

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK CIRCUIT 1671 (RD) FOR VOLTAGE
- Disconnect: Wiper Motor C125.
- Key in ON position.
- Measure the voltage between windshield wiper C125-5, circuit 1671 (RD), harness side and ground; and between windshield wiper motor C125-8, circuit 1671 (RD), harness side and ground.
  
  Fig 1: Checking Circuit 1671 (RD) For Voltage
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
Yes: : GO to A10.

No: VERIFY the BJB fuse 37 (30A) is OK. If OK, GO to A2.
A2 CHECK CIRCUIT 1671 (RD) FOR AN OPEN
- Disconnect: Windshield Wiper Fuse 37.
- Key in OFF position.
- Measure the resistance between windshield wiper motor C125-5, circuit 1671 (RD), harness side, and battery junction box (BJB) windshield wiper fuse cavity 37, circuit 1671 (RD), harness side; and between windshield wiper motor J125-8, circuit 1671 (RD), harness side, and BJB fuse cavity 37, circuit 1671 (RD), harness side.
  
  Fig 2: Checking Circuit 1671 (RD)
  Courtesy of FORD MOTOR CO.
- Are both resistances less than 5 ohms?
Yes: GO to A3.

No: REPAIR the circuit. TEST the system for normal operation.
A3 CHECK THE WIPER HIGH CURRENT RELAY
- Disconnect: Wiper High Current Relay.
- Carry out the wiper high current relay component test. Refer to COMPONENT TESTING article for component testing.
- Did the wiper high current relay pass the component test?
Yes: GO to A4.

No: INSTALL a new wiper high current relay. TEST the system for normal operation.
A4 CHECK CIRCUIT 698 (RD) FOR VOLTAGE
- Measure the voltage between wiper high current relay pin 3, circuit 698 (RD), harness side and ground.
  
  Fig 3: Measuring Voltage Between Wiper High Current Relay Pin 3, Circuit 698 (RD), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to A5.

No: VERIFY BJB fuse 4 (50A) is OK. If OK, CHECK BJB wiper high current relay pin 3 for looseness, corrosion, dirt or damage. REPAIR the circuit or install a new BJB as necessary. TEST the system for normal operation.
A5 CHECK BJB CIRCUIT 1672 (DB) FOR AN OPEN
- Connect a fused jumper wire between BJB wiper high current relay pin 3, circuit 698 (RD), harness side, and BJB wiper high speed relay pin 4, circuit 1672 (DB), harness side.
  
  Fig 4: Connecting Fused Jumper Wire Between BJB Wiper High Current Relay Pin 3, Circuit 698 (RD), Harness Side & BJB Wiper High Speed Relay Pin 4, Circuit 1672 (DB), Harness Side
  Courtesy of FORD MOTOR CO.
- Key in ON position.
- Measure the voltage between BJB wiper fuse C37, circuit 1672 (DB) and ground.
  
  Fig 5: Measuring Voltage Between BJB Wiper Fuse C37, Circuit 1672 (DB) & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to A6.

No: CHECK BJB wiper high current relay pin 4, circuit 1672 (DB) and wiper fuse 37 cavity, circuit 1672 (DB) for looseness, corrosion, dirt or damage. REPAIR the open circuit or install a new BJB as necessary. TEST the system for normal operation.
A6 CHECK WIPER HIGH CURRENT RELAY CIRCUIT 1205 (BK) FOR GROUND
- Measure the resistance between BJB wiper high current relay pin 2, circuit 1205 (BK), and ground.
  
  Fig 6: Measuring Resistance Between BJB Wiper High Current Relay Pin 2, Circuit 1205 (BK) & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: GO to A7.

No: CHECK BJB wiper high current relay pin 2 for looseness, corrosion, dirt or damage. REPAIR the open circuit or INSTALL a new BJB as necessary. TEST the system for normal operation.
A7 CHECK CIRCUIT 296 (WH/PK) FOR VOLTAGE
- Key in ON position.
- Measure the voltage between BJB wiper high current relay pin 1, circuit 296 (WH/PK), harness side and ground.
  
  Fig 7: Measuring Voltage Between BJB Wiper High Current Relay Pin 1, Circuit 296 (WH/PK), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: The system is operating normally at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

No: VERIFY SJB fuse 23 (7.5A) is OK. If OK, GO to A8.
A8 CHECK CIRCUIT 296 (WH/PK) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280a.
- Measure the resistance between BJB wiper high current relay pin 1, circuit 296 (WH/PK), harness side and SJB C2280a-10, circuit 296 (WH/PK), harness side.
  
  Fig 8: Measuring Resistance Between BJB Wiper High Current Relay Pin 1, Circuit 296 (WH/PK), Harness Side & SJB C2280a-10, Circuit 296 (WH/PK), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: GO to A9.

No: REPAIR the circuit or install a new BJB as necessary. TEST the system for normal operation.
A9 CHECK CIRCUIT 1716 (GY/YE) FOR VOLTAGE
- Key in ON position.
- Measure the voltage between SJB C2280b-4, circuit 1716 (GY/YE), harness side and ground.
  
  Fig 9: Measuring Voltage Between SJB C2280b-4, Circuit 1716 (GY/YE), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: INSTALL a new SJB. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. TEST the system for normal operation.

No: REFER to PINPOINT TEST C: NO POWER IN RUN to diagnose the inoperative RUN/ACCESSORY circuit.
A10 CHECK CIRCUITS 1205 (BK) AND 1203 (BK/LB) FOR OPENS
- Key in OFF position.
- Measure the resistance between windshield wiper C125-6, circuit 1205 (BK), harness side and ground; and between windshield wiper motor C125-3, circuit 1203 (BK/LB), harness side and ground.
  
  Fig 10: Checking Circuits 1205 (BK) & 1203 (BK/LB)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
Yes: GO to A11.

No: REPAIR the circuit(s). TEST the system for normal operation.
A11 CHECK THE WIPER SWITCH
- Disconnect: Wiper Switch C202b.
- Carry out the wiper switch component test. Refer to COMPONENT TESTING article for component testing.
- Did the wiper switch pass the component test?
Yes: GO to A12.

No: INSTALL a new wiper switch. REFER to REMOVAL AND INSTALLATION .
A12 CHECK WIPER SWITCH CIRCUIT 1205 (BK) FOR OPEN
- Measure the resistance between wiper switch C202b-2, circuit 1205 (BK), harness side and ground.
  
  Fig 11: Checking Wiper Switch Circuit 1205 (BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: GO to A13.

No: REPAIR the circuit. TEST the system for normal operation.

A13 CHECK CIRCUITS 61 (YE/RD), 63 (RD), 950 (WH/BK) AND 58 (WH) FOR OPENS

Using CIRCUIT REFERENCE TABLE , measure the resistance between wiper switch C202b harness side and windshield wiper motor C125 harness side:

CIRCUIT REFERENCE TABLE

Wiper Switch C202b	Windshield Wiper Motor C125
C202b-12, circuit 61 (YE/RD)	C125-10, circuit 61 (YE/RD)
C202b-1, circuit 63 (RD)	C125-11, circuit 63 (RD)
C202b-5, circuit 950 (WH/BK)	C125-12, circuit 950 (WH/BK)
C202b-4, circuit 58 (WH)	C125-1, circuit 58 (WH)

Fig 12: Measuring Resistance Between Wiper Switch C202b Harness Side & Windshield Wiper Motor C125 Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes: GO to A14.

No: REPAIR the circuit(s). TEST the system for normal operation.

A14 CHECK FOR CORRECT WIPER MOTOR OPERATION
- Disconnect the windshield wiper motor connector.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect the windshield wiper motor connectors and make sure they are seated 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 . TEST the system for normal operation.

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.