Pinpoint Test A: The Wipers Are Inoperative
WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 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 : VERIFY the central junction box (CJB) fuses 1 (10A) and 113 (30A) are OK. If OK, 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 MULTI-FUNCTION SWITCH
- Disconnect: Multi-Function Switch C202a
- Carry out the multi-function switch component test. Refer to COMPONENT TESTING.
- Did the multi-function switch pass the component test?
- YES : Go to A4.
- NO : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES article.
- 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 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 Wiper Motor in this article.
- 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.