Wiper Switch: Testing and Inspection

WIPER / WASHER: WIPER SWITCH: INSPECTION

1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

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





Standard Resistance:

Front Wiper Switch






Standard Resistance:

Front Washer Switch






Standard Resistance:

Rear Wiper Switch






Standard Resistance:

Rear Washer Switch






Text in Illustration





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

(b) Check the intermittent operation.

(1) Connect the positive (+) lead of a voltmeter to terminal B-3 (+1) and the negative (-) lead to terminal A-2 (EW).

(2) Connect the positive (+) lead of the battery to terminal B-2 (+B) and the negative (-) lead to terminals A-2 (EW) and B-1 (+S).

(3) Turn the wiper switch to the INT position.

(4) Connect the positive (+) lead of the battery to terminal B-1 (+S) for 5 seconds.

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

OK:

Voltage changes as shown in the illustration below.





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

Text in Illustration





(c) Check the front washer operation.

(1) Turn the wiper switch off.

(2) Connect the positive (+) lead of the battery to terminal B-2 (+B) and the negative (-) lead to terminals B-1 (+S) and A-2 (EW).

(3) Connect the positive (+) lead of a voltmeter to terminal B-3 (+1) and the negative (-) lead to terminal A-2 (EW).

(4) Turn the washer switch on and off, and check the voltage between terminals B-3 (+1) and A-2 (EW).

OK:

Voltage changes as shown in the illustration below.





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