Wiper Switch: Testing and Inspection

WIPER / WASHER: WIPER SWITCH: INSPECTION

1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

(a) w/o Auto Wiper System

(1) Measure the resistance according to the value(s) in the table below.





Standard Resistance:

Front Washer Switch

Front Wiper Switch









If the result is not as specified, replace the windshield wiper switch assembly.

Text in Illustration





(2) Check the intermittent operation.

1 Connect a voltmeter positive (+) lead to terminal F28-3 (+1) and a negative (-) lead to terminal F27-2 (EW).

2 Connect a battery positive (+) lead to terminal F28-2 (+B) and a negative (-) lead to terminal F27-2 (EW) and F28-1 (+S).

3 Turn the wiper switch to the INT position.

4 Connect a battery positive (+) lead to terminal F28-1 (+S) for 5 seconds.

5 Connect a battery negative (-) lead to terminal F28-1 (+S). Operate the intermittent wiper relay and check the voltage between terminals F28-3 (+1) and F27-2 (EW).

OK:

Voltage changes as shown in the illustration.





If the result is not as specified, replace the windshield wiper switch assembly.

Text in Illustration





(b) w/ Auto Wiper System

(1) Measure the resistance according to the value(s) in the table below.





Standard Resistance:

Front Washer Switch

Front Wiper Switch









If the result is not as specified, replace the windshield wiper switch assembly.

Text in Illustration