Pinpoint Test A: The Wipers Are Inoperative
WARNING: This page is about a different car, the 2005 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- A1 CHECK CIRCUITS 65 (DG) AND 1671 (RD) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Windshield 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 65 (DG), harness side and ground.
- Are the voltages greater than 10 volts?
- Yes : GO to A2.
- No : REPAIR the circuit(s) in question. TEST the system for normal operation
- A2 CHECK CIRCUITS 57 (BK) AND 875 (BK/LB) FOR OPENS
- Key in OFF position.
- Measure the resistance between windshield wiper C125-6, circuit 57 (BK), harness side and ground; and between windshield wiper motor C125-3, circuit 875 (BK/LB), harness side and ground.
- 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 C202a.
- Carry out the multifunction switch component test. Refer to COMPONENT TESTING -- F150 PICKUP 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 875 (BK/LB) FOR AN OPEN
- Measure the resistance between C202a-4, circuit 875 (BK/LB), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : GO to A5.
- No : REPAIR the circuit. TEST the system for normal operation.
- A5 CHECK CIRCUITS 680 (LB/OG), 1300 (PK), 485 (PK/BK) AND 1301 (YE) FOR OPENS
- Using the following table, measure the resistance between the multifunction switch C202a harness side and the windshield wiper motor C125 harness side:
Courtesy of FORD MOTOR CO.
MULTIFUNCTION SWITCH C202A AND WINDSHIELD WIPER MOTOR C125Multifunction Switch C202a Windshield Wiper Motor C125 C202a-2, circuit 680 (LB/OG) C125-10, circuit 680 (LB/OG) C202a-3, circuit 1300 (PK) C125-11, circuit 1300 (PK) C202a-5, 485 (PK/BK) C1258-1, circuit 485 (PK/BK) C202a-1, circuit 1301 (YE) C125-9, circuit 1301 (YE) - Are the resistances less than 5 ohms?
- Yes : GO to A6.
- No : REPAIR the circuit(s) in question. TEST the system for normal operation.
- Using the following table, measure the resistance between the multifunction switch C202a harness side and the windshield wiper motor C125 harness side:
- A6 CHECK FOR CORRECT WIPER MOTOR OPERATION
- Disconnect the wiper motor connector.
- Check for:
- corrosion
- pushed-out pins
- Connect the wiper motor connector and make sure it seats 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 WINDSHIELD WIPER MOTOR .
- 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.