Pinpoint Test C: The Wipers Stay On Continuously - Windshield

Wipers and Washers

Pinpoint Test C: The Wipers Stay On Continuously - Windshield

Refer to Wiring Diagrams Set 81, Wipers and Washers for schematic and connector information. Electrical Diagrams

Normal Operation

Under normal operation, the windshield wiper motor receives open and ground inputs from the multifunction switch through circuits CRW17 (GN/VT), CRW18 (VT/WH), CRW19 (BU/OG) and CRW08 (VT/OG) to activate the wipers to the appropriate speeds.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Multifunction switch

- Windshield wiper motor

- Front wiper relay

PINPOINT TEST C : THE WIPERS STAY ON CONTINUOUSLY - WINDSHIELD

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

C1 CHECK THE FRONT WIPER RELAY

- Ignition OFF.

- Disconnect: Front Wiper Relay.

- Carry out the Relay component test for the Battery Junction Box (BJB) front wiper relay.

Did the front wiper relay pass the component test?

Yes
GO to C2.

No
INSTALL a new front wiper relay. TEST the system for normal operation.

C2 CHECK THE MULTIFUNCTION SWITCH

- Disconnect: Multifunction Switch C202.

- Carry out the Multifunction Switch component test.

Did the multifunction switch pass the component test?

Yes
GO to C3.

No
INSTALL a new multifunction switch.

C3 CHECK CIRCUITS CRW19 (BU/OG), CRW18 (VT/WH), CRW08 (VT/OG) AND CRW17 (GN/VT) FOR A SHORT TO GROUND

- Disconnect: Windshield Wiper Motor C125.

- Measure the resistance between ground and wiper motor:
- C125-1, circuit CRW08 (VT/OG), harness side.

- C125-9, circuit CRW17 (GN/VT), harness side.

- C125-10, circuit CRW19 (BU/OG), harness side.

- C125-11, circuit CRW18 (VT/WH), harness side.






Are the resistances greater than 10,000 ohms?

Yes
GO to C4.

No
REPAIR the circuit(s) in question. TEST the system for normal operation.

C4 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
INSTALL a new windshield wiper motor. REFER to Wiper Motor - Windshield .

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.