Pinpoint Test Q: The Wipers Stay On Continuously

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

Q1 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202a.
- Carry out the multifunction switch component test.
  Refer to COMPONENT TESTING for schematic and connector information.
- Did the multifunction switch pass the component test?
Yes

GO to Q2.

No

INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES .
Q2 CHECK CIRCUIT 1302 (WH/LG) FOR OPEN
- Measure the resistance between C202a-4, circuit 1302 (WH/LG), harness side and ground.
  
  Fig 1: Measuring Resistance Between C202A-4 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes

GO to Q3.

No

REPAIR the circuit. TEST the system for normal operation.

Q3 CHECK CIRCUITS 682 (DB), 680 (LB/OG), 684 (PK/YE), AND 671 (LB) FOR SHORTS

Disconnect: Windshield Wiper Motor C1348.

Using the following table, measure the resistance between the windshield wiper motor C1348 harness side and ground:

WINDSHIELD WIPER MOTOR

Windshield Wiper Motor C1348	Ground
C1348-10, circuit 682 (DB)	ground
C1348-11, circuit 680 (LB/OG)	ground
C1348-1, circuit 684 (PK/YE)	ground
C1348-9, circuit 671 (LB)	ground

Fig 2: Measuring Resistance Between Windshield Wiper Motor C1348 And Ground

Courtesy of FORD MOTOR CO.

Is the resistance greater than 10,000 ohms?

Yes

GO to Q4.

REPAIR the circuit(s) in question. TEST the system for normal operation.

Q4 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 Q5.

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.
Q5 CHECK THE WINDSHIELD WIPER MOTOR
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C1348.
- Carry out the WINDSHIELD WIPER MOTOR component test as outlined.
- Did the windshield wiper motor pass the component test?
Yes

The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. TEST the system for normal operation.

No

INSTALL a new windshield wiper motor. REFER to WINDSHIELD WIPER .