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
Front Washer Switch
Rear Wiper Switch
Rear Washer Switch
If the result is not as specified, replace the windshield wiper switch assembly. Text in Illustration
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(b) Check the intermittent operation.
- Connect the positive (+) lead of a voltmeter to terminal A-3 (+1) and the negative (-) lead to terminal B-2 (EW).
- Connect the positive (+) lead of the battery to terminal A-2 (+B) and the negative (-) lead to terminal B-2 (EW) and A-1 (+S).
- Turn the wiper switch to the INT position.
- Connect the positive (+) lead of the battery to terminal A-1 (+S) for 5 seconds.
- Connect the negative (-) lead of the battery to terminal A-1 (+S). Operate the intermittent wiper relay and check the voltage between terminals A-3 (+1) and B-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*1
Voltage between terminals A-3 (+1) and B-2 (EW)
*2
FAST: Negative lead of battery connected to terminal A-1 (+S)
*3
SLOW: Negative lead of battery connected to terminal A-1 (+S)
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Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.
