Pinpoint Test B: The Wipers Stay On Continuously
Wipers and Washers
Pinpoint Tests
Pinpoint Test B: The Wipers Stay On Continuously
Refer to Wiring Diagram Set 81, Wipers and Washers for schematic and connector information. Diagrams By Number
Normal Operation
The windshield wiper motor receives open and ground inputs from the windshield wiper/washer switch through circuits 56 (DB/OG), 58 (WH), 61 (YE/RD) and 63 (RD) to activate the wipers to the appropriate modes. The module (internal) controls the run/park relay (internal) using internal circuitry to control the windshield wiper motor in conjunction with the high/low relay (internal).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Windshield wiper motor
- Windshield wiper/washer switch
PINPOINT TEST B: THE WIPERS STAY ON CONTINUOUSLY
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B1 CHECK THE WINDSHIELD WIPER/WASHER SWITCH
- Ignition OFF.
- Disconnect: Windshield Wiper/Washer Switch C2137.
- Carry out the windshield wiper/washer switch component test.
- Does the windshield wiper/washer switch pass the component test?
Yes
GO to B2.
No
INSTALL a new windshield wiper/washer switch. REFER to Wiper/Washer Switch Wiper/Washer Switch.
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B2 CHECK CIRCUITS 56 (DB/OG), 58 (WH), 61 (YE/RD) AND 63 (RD) FOR A SHORT TO GROUND
- Disconnect: Windshield Wiper Motor C125.
- Measure the resistance between ground and windshield wiper motor:
- C125-1, circuit 63 (RD), harness side.
- C125-9, circuit 61 (YE/RD), harness side.
- C125-10, circuit 56 (DB/OG), harness side.
- C125-11, circuit 58 (WH), harness side.
- Are the resistances greater than 10,000 ohms?
Yes
GO to B3.
No
REPAIR the circuit(s) in question. TEST the system for normal operation.
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B3 CHECK FOR CORRECT WINDSHIELD WIPER MOTOR OPERATION
- Disconnect all the windshield wiper motor connectors.
- Check for:
- corrosion.
- pushed-out pins.
- Connect all the windshield 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
INSTALL a new windshield wiper motor. REFER to Wiper Motor Service and Repair. TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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