Testing and Inspection for Windshield Washer Switch - Tundra Regular Cab SR5 2000
c. Connect the positive (+) lead from the battery to terminal 16 and the negative (-) lead to terminal 2.
d. Connect the positive (+) lead from the voltmeter to terminal 7 and the negative (-) lead to terminal 2, check that the meter needle indicates
battery positive voltage.
If continuity is not as specified, replace the switch.