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 two 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 Non-Interval

Courtesy of FORD MOTOR CO.

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

Intermittent Switch Position

Intermittent Terminals

Off (Park)

A-B, D-E

Low

A-B, D-E-F

High

D-E-F, A-B-C

Intermittent

⁽¹⁾ D-E-F, A-B, D-E

Wash

W1-W2

⁽¹⁾	Variable resistance between terminals D-E should be minimum 100-900 ohms and maximum 5600-8400 ohms.

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

Courtesy of FORD MOTOR CO.

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

Fig 3: Blade Type (Slide Switch) Connector Interval

Courtesy of FORD MOTOR CO.

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

NOTE: Resistance between terminals F-C will vary 500±400 ohms at minimum dwell to 10, 000:2000 at maximum dwell.