Pinpoint Test B: The Wipers Stay on Continuously

Wipers and Washers

Pinpoint Test B: The Wipers Stay on Continuously

Normal Operation

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

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Multifunction switch

- Wiper motor

PINPOINT TEST B : THE WIPERS STAY ON CONTINUOUSLY

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.

B1 CHECK THE MULTIFUNCTION SWITCH

- Ignition OFF.

- Disconnect: Multifunction Switch C202C.

- Carry out the Multifunction Switch Component Test.

Did the multifunction switch pass the component test?

Yes
GO to B2.

No
INSTALL a new multifunction switch.

B2 CHECK CIRCUITS CRW08 (VT/OG), CRW17 (GN/VT), CRW19 (BU/OG) AND CRW18 (VT/WH) 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.






Is the resistance greater than 10,000 ohms?

Yes
GO to B3.

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

B3 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 wiper motor. REFER to Wiper Motor Service and Repair.

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.