Pinpoint Test I: The Wash And Wipe Function Is Inoperative - Rear

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.

I1 CHECK THE LIFTGATE AJAR PARAMETER IDENTIFICATION (PID)
- Monitor the liftgate ajar PID while opening and closing the liftgate.
- Does the liftgate ajar PID agree with the liftgate position?
Yes: GO to I2.

No: REFER to INTERIOR LIGHTING to diagnose the liftgate ajar circuit.

I2 CHECK LIFTGATE AJAR CIRCUIT 700 (WH/PK) FOR AN OPEN

Key in OFF position.
Disconnect: SJB C2280c.
Disconnect: Liftgate Ajar Switch C479.

Using CIRCUIT REFERENCE TABLE , measure the resistance between SJB C2280c, rear window wiper motor C476, and liftgate ajar switch C479 harness side:

CIRCUIT REFERENCE TABLE

SJB C2280C	Liftgate Ajar Switch C479	Rear Window Wiper Motor C476
C2280c-5, circuit 700 (WH/PK)	C479-C, circuit 700 (WH/PK)	-
C2280c-5, circuit 700 (WH/PK)	-	C476-3, circuit 700 (WH/PK)
-	C479-C, circuit 700 (WH/PK)	C476-3, circuit 700 (WH/PK)

Fig 1: Measuring Resistance Between SJB C2280c, Rear Window Wiper Motor C476, & Liftgate Ajar Switch C479 Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes: GO to I3.

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

I3 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 I4.

No: INSTALL a new wiper switch. REFER to REMOVAL AND INSTALLATION .
I4 CHECK WIPER SWITCH CIRCUIT 1205 (BK) FOR OPEN
- Measure the resistance between wiper switch C202b7, circuit 1205 (BK), harness side and ground.
  
  Fig 2: Measuring Resistance Between Wiper Switch C202b7, Circuit 1205 (BK), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: GO to I5.

No: REPAIR the circuit. TEST the system for normal operation.
I5 CHECK CIRCUIT 485 (PK/BK) FOR AN OPEN
- Measure the resistance between wiper switch C202b-10, circuit 485 (PK/BK), harness side and C476-7, circuit 485 (PK/BK), harness side.
  
  Fig 3: Measuring Resistance Between Wiper Switch C202b-10, Circuit 485 (PK/BK), Harness Side & C476-7, Circuit 485 (PK/BK), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: GO to I6.

No: REPAIR the circuit. TEST the system for normal operation.
I6 CHECK FOR CORRECT REAR WINDOW WIPER MOTOR OPERATION
- Disconnect all rear window wiper motor connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect the rear window 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 rear window wiper motor. Refer to WIPER MOTOR - REAR WINDOW . 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.