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Home >> Lexus >> 2003 >> GX 470 V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Wiper and Washer Systems >> Wiper Switch >> Testing and Inspection
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Wiper Switch: Testing and Inspection

WINDSHIELD WIPER SWITCH ASSY




a. Continuity Check
1. Check the continuity of each terminal of the windshield wiper switch.




Front Wiper Switch (W/ Rain Sensor)




Front Wiper Switch (W/O Rain Sensor)




Rear Wiper Switch




Front Washer Switch




Rear Washer Switch




b. Intermittent Operation Check
1. Connect the voltmeter (+) terminal to terminal 7 (+1) of the connector and the voltmeter (-) terminal to terminal 2 (EW) of the connector.
2. Connect the battery (+) to terminal 17 (+B) of the connector and the battery (-) to terminal 2 (EW) and 16 (+S) of the connector.
3. Turn the wiper switch to INT
4. Connect the battery (+) to terminal 16 (+S) of the connector for 5 seconds.
5. Connect the battery (-) to terminal 16 (+S) of the connector. Operate the intermittent wiper relay and check voltage between terminal 7 (+1) and terminal 2(EW).




c. Operation Check (Front Wiper)
1. Turn the wiper switch to OFF
2. Connect the battery (+) to terminal 17 (+B) of the connector and the battery (-) to terminal 16 (+S) and 2 (EW) of the connector.
3. Connect the voltmeter (+) terminal to terminal 7 (+1) of the connector and the voltmeter (-) terminal to terminal 2 (EW) of the connector. Turn the washer switch to ON and OFF, and check voltage between terminal 7 (+1) and terminal 2 (EW).
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