Tundra 2WD V6-4.0L (1GR-FE) (2005)
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Washer Fluid Level Switch: Testing and Inspection
INSPECT WASHER LEVEL SWITCH CONTINUITY
a. Check that there is no continuity between the terminals with the switch OFF (float).
b. Check that there is continuity between the terminals with the switch ON (sink).
If the continuity is not as specified, replace the switch.