Pinpoint Test B: The Wipers Stay On Continuously

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

B1 CHECK THE MULTI-FUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multi-function Switch C202b.
- Carry out the multi-function switch component test, Refer to COMPONENT TESTING .
- Does the multi-function switch pass the component test?
Yes : GO to B2.

No : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES .
B2 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between multi-function switch C202b-5, circuit 57 (BK), harness side and ground.
  
  Fig 1: Measuring Resistance Between Multi-Function Switch C202B-5 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to B3.

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

B3 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD) AND 63 (RD) FOR A SHORT TO GROUND

Disconnect: Windshield Wiper Motor C125.

Using the following table, measure the resistance between windshield wiper motor C125 harness side and ground:

WINDSHIELD WIPER MOTOR C125 REFERENCE

Windshield Wiper Motor C125	Circuit
Pin 10	Circuit 56 (DB/OG)
Pin 11	Circuit 58 (WH)
Pin 1	Circuit 61 (YE/RD)
Pin 9	Circuit 63 (RD)

Fig 2: Measuring Resistance Between Windshield Wiper Motor C125 And Ground

Courtesy of FORD MOTOR CO.

Are the resistances greater than 10,000 ohms?

Yes : GO to B4.

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

B4 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 B5.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
B5 CHECK THE WINDSHIELD WIPER MOTOR
- Key in OFF position.
- Disconnect: Windshield Wiper Motor C125.
- Carry out the windshield wiper motor component test as outlined.
- Does the windshield wiper motor pass the component test?
Yes : The system is operating correctly at this time. The concern may have been caused by binding or incorrect pivot arm adjustment. REFER to WIPER BLADE AND PIVOT ARM ADJUSTMENT . TEST the system for normal operation.

No : INSTALL a new windshield wiper motor. REFER to WIPER MOTOR .