Wiper Motor: Testing and Inspection

Check current draw of windshield wiper motor

CAUTION: The magnets in the wiper motor can be damaged if it is dropped or knocked.

NOTE: The measuring range on the ammeter should be at least 6 A.

^ Switch off the ignition.
^ Disconnect the connector.
^ Connect the battery positive terminal to the positive terminal of the ammeter.
^ Connect the battery ground terminal to the wiper motor housing.
^ Connect the ammeter negative terminal to wiper motor connector pin 6. As the wiper motor operates at fast speed, take a current input reading from the ammeter. The required value is 4 A maximum.
^ Disconnect the wiper motor connector pin 6 from the ammeter negative terminal.
^ Connect the wiper motor connector pin 5 to the ammeter negative terminal. As the wiper motor operates at slow speed, take a current input reading from the ammeter. The required value is 2 A maximum.







Check limit switch ON position

NOTE: The wiper motor must not be in park position.

^ Measure the resistance between wiper motor connector pin 2 and pin 3.

If the resistance less than 5 ohms, proceed to the next step.

If the resistance is greater than 5 ohms, replace the wiper motor.







Check limit switch OFF position
^ Measure the resistance between wiper motor connector pin 2 and pin 4.

If the resistance less than 5 ohms the wiper motor is OK.

If the resistance is greater than 5 ohms, replace the wiper motor.