Wiper Switch Test

WARNING: This page is about a different car, the 1995 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

Unplug wiper switch connector. Measure resistance between specified terminals. See WIPER SWITCH TEST table. See Fig 1 . Replace switch if readings are not as specified.

WIPER SWITCH TEST

Switch Position

Terminals

Resistance: k/ohms

OFF

590 To 993

103.3

OFF

589 To 993

47.6

LOW

589 To 993

4.08

HIGH

589 To 993

WASH

590 To 993

INT

589 To 993

11.3

INT ⁽¹⁾

MIN

590 To 993

3.3

MAX

590 To 993

103.3

⁽¹⁾	Rotate (INT) interval knob from minimum to maximum. Resistance should gradually increase from 3.3 k/ohms (MIN) to 103.3 k/ohms (MAX). All measurements should be within 10% of specifications.

Fig 1: Identifying Wiper Switch Terminals

Courtesy of FORD MOTOR CO.