Sequoia LTD 4WD V8-4.7L (2UZ-FE) (2001)
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Washer Fluid Level Switch: Testing and Inspection
INSPECT WASHER LEVEL SWITCH CONTINUITY
a. Check that there is no continuity between terminals with switch OFF (float up).
b. Check that there is continuity between terminals with the switch ON (float down).
If operation is not as specified, replace the jar & pump assembly.