What resistance should the wiper switch circuit show in each position?

Between terminals 684 (PK/Y) and 682 (DB): OFF = 47.6k ohm, INT = 11.33k ohm, LO = 4.08k ohm, and HI = closed circuit.

How do I test the washer switch circuit on the multi-function switch?

Connect a self-powered test light or ohmmeter to terminals 680 (LB/O) and 682 (DB). With the wiper switch OFF, pushing the washer switch in should show a closed circuit and releasing it should show an open circuit.

What are the interval time adjust resistance values?

Measured between 608 (LB/O) and 682 (DB): INT Max (#1 detent) = 103K ohms, #2 = 82.3K ohms, #3 = 66.3K ohms, #4 = 51.3K ohms, #5 = 36.3K ohms, #6 = 20.3K ohms, #7 = 3.3K ohms.

What wire colors correspond to the wiper/washer circuits at the switch connector?

684 is PK/Y (wiper switch), 682 is DB (common/ground side), and 680 is LB/O (washer switch). Other terminals shown include 383 (R/W), 385 (W/R), 1039 (BK/Y), and 196 (DB/O).

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Ford Taurus Multi-Function Switch Wiper/Washer Testing & Terminal Diagram

Wiper/washer multi-function switch testing chart, schematic and terminal layout

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Component testing procedure and schematic for the wiper/washer multi-function switch with resistance values and color-coded terminals.

AI caption December 2007 · Photo 345 of 579

This document is a component testing procedure and schematic for the wiper/washer portion of a Ford multi-function switch (steering column switch). A table explains how to test the washer switch circuit (using an ohmmeter or self-powered test light between terminals 680 LB/O and 682 DB, expecting a closed circuit when the washer button is pushed and open circuit when released) and the wiper switch circuit (between 684 PK/Y and 682 DB, expecting 47.6k ohms in OFF, 11.33k ohms in INT, 4.08k ohms in LO, and a closed circuit in HI). A continuation table covers the interval time adjust function between 608 (LB/O) and 682 (DB), listing resistance values for detents #1 through #7 ranging from 103K ohms down to 3.3K ohms. A schematic diagram shows the internal resistor network of the switch with individual resistance values and switch positions (OFF, INT MIN/MAX, LO, HI, WASH). A terminals diagram identifies the physical connector cavities of the multi-function switch with circuit numbers and wire colors, including 383 (R/W), 385 (W/R), 1039 (BK/Y), 196 (DB/O), 684 (PK/Y), 682 (DB), and 680 (LB/O). This allows diagnosis of wiper/washer problems by resistance testing at the switch connector.

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Frequently asked questions

What resistance should the wiper switch circuit show in each position?: Between terminals 684 (PK/Y) and 682 (DB): OFF = 47.6k ohm, INT = 11.33k ohm, LO = 4.08k ohm, and HI = closed circuit.
How do I test the washer switch circuit on the multi-function switch?: Connect a self-powered test light or ohmmeter to terminals 680 (LB/O) and 682 (DB). With the wiper switch OFF, pushing the washer switch in should show a closed circuit and releasing it should show an open circuit.
What are the interval time adjust resistance values?: Measured between 608 (LB/O) and 682 (DB): INT Max (#1 detent) = 103K ohms, #2 = 82.3K ohms, #3 = 66.3K ohms, #4 = 51.3K ohms, #5 = 36.3K ohms, #6 = 20.3K ohms, #7 = 3.3K ohms.
What wire colors correspond to the wiper/washer circuits at the switch connector?: 684 is PK/Y (wiper switch), 682 is DB (common/ground side), and 680 is LB/O (washer switch). Other terminals shown include 383 (R/W), 385 (W/R), 1039 (BK/Y), and 196 (DB/O).