Switch Continuity

Check continuity between switch terminals. See Fig 1 . Either a self-powered test light or an ohmmeter can be used with standard system. An ohmmeter must be used with interval wiper system.
To detect marginal operation of switch, move switch lever while each reading is taken. If switch does not show continuity or shows poor continuity in any switch position, replace switch.

WIPER SWITCH CONTINUITY

Switch Position

Standard Wiper System

Interval Wiper System

Off

⁽¹⁾ P-L

****

Low

B-L

High

B-H

⁽²⁾ B-H-L

Wash

B-W

⁽³⁾ B-W

Interval

*****

B-I

⁽¹⁾	No continuity between terminals P and L.

⁽²⁾	No continuity between terminals H and L.

⁽³⁾	Variable resistance between terminals R1 and R2 must be between 420 ohms (minimum) and 13,000 ohms (maximum).

Fig 1: Wiper Switch Connector Terminals

Courtesy of FORD MOTOR CO.