Wiper Switch Continuity Test

Check continuity between switch terminals as shown in illustrations. Either a self powered test light or an ohmmeter can be used to test a standard 2-speed switch. An ohmmeter must be used to test a switch with the intermittent system.

To detect marginal operation of switch, rotate knob or slide switch while each reading is being taken. If switch does not exhibit continuity as shown or poor continuity exists, replace switch.

Fig 1: Blade Type Switch Connector

Courtesy of FORD MOTOR CO.

BLADE TYPE SWITCH CONTINUITY

Switch Position

Terminals

Off (Park)

C-D, A-B

Low

A-B-C

High

A-B-E

Wash

A-B-W1

Intermittent Switch Position

Intermittent Terminals

Off (Park)

A-B, D-E

Low

1A-B, D-E-F

High

1D-E-F, A-B-C

Intermittent

⁽¹⁾E-F, A-B

Wash

A-B-W1

⁽¹⁾	Variable resistance between terminals D-E should be minimum 200-1000 ohms and maximum 5600-8400 ohms.

Fig 2: Blade Type (Slide Switch) Connector Non-Interval.

Courtesy of FORD MOTOR CO.

SLIDING TYPE (NON-INTERVAL) SWITCH CONTINUITY

Switch Position (Non-Interval)	Terminals
Off (Park)	1-5, 3-7
Low	1-4, 2-7
High	1-4, 2-6
Wash	W1-W2

Fig 3: Blade Type (Slide Switch) Connector Interval Type

Courtesy of FORD MOTOR CO.

SLIDING TYPE (INTERVAL) SWITCH CONTINUITY

Switch Position (Interval)	Terminals
Off (Park)	A-E
Low	B-E-F-C
High	D-B-F-C
Intermittent	B-E-F
Wash	W1-W2

NOTE: Resistance between terminals F-C will vary from 100-900 ohms at minimum dwell to 8, 000-12, 000 at maximum dwell.