Windshield Washer Switch: Testing and Inspection
INSPECT WASHER LINKED OPERATION
a. Connect the positive (+) lead from the battery to terminal B18 and the negative (-) lead to terminal B16.
b. Connect the positive (+) lead from the voltmeter to terminal B7 and the negative (-) lead to terminal B16.
c. Push in the washer switch. Check that the voltage changes, as shown in the table.
If operation is not as specified, replace the switch.