Wiper Switch

Test for continuity between switch terminals. See Fig 1 . See WIPER SWITCH CONTINUITY table. To detect marginal operation of switch, move switch lever while making measurements. If continuity or resistance is not as specified, or if continuity is poor in any position, replace switch.

WIPER SWITCH CONTINUITY

Switch Position & Condition

Between Terminal

Resistance (Ohms)

Washer On

4 & 6

Continuity

Washer Off

4 & 6

47,600 Ohms

Wiper Off

1 & 4

103,300 Ohms

Low Speed

4 & 6

3300 Ohms

High Speed

4 & 6

3300 Ohms

Interval (MAX)

1 & 4

⁽¹⁾ 103,000 Ohms

Interval (MIN)

1 & 4

⁽¹⁾ 3300 Ohms

⁽¹⁾	Resistance should vary smoothly between specified limits as knob is rotated between MIN and MAX positions.

Fig 1: Identifying Wiper Switch Terminals

Courtesy of FORD MOTOR CO.