Section 01-16: Wiper and Washer Systems
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING
Symptom Chart
Condition
Possible Source
Action
Windshield Washer System Does Not Operate
Low fluid level.
Fill as required.
Split, loose, pinched or kinked windshield washer hose .
Inspect windshield washer hose . Service as required.
Circuitry open/shorted.
Damaged turn signal and windshield wiper switch .
Damaged windshield wiper control module.
Damaged windshield washer pump .
Go to
Pinpoint Test A.
No Wipe After Wash
Damaged wiper control module.
Damaged turn signal and windshield wiper switch.
Damaged circuitry.
Go to
Pinpoint Test Step A9.
Windshield Wipers Inoperative in All Control Switch Positions
Open fuse.
Poor ground at windshield wiper motor.
Damaged turn signal and windshield wiper switch .
Open circuitry or connector.
Damaged windshield wiper control module.
Go to
Pinpoint Test B.
Damaged windshield wiper motor linkage.
Service as required.
Windshield Wipers Inoperative at High Speed
Damaged windshield wiper motor .
Damaged turn signal and windshield wiper switch .
Damaged circuitry.
Go to
Pinpoint Test B.
Windshield Wipers Inoperative at Low Speed
Damaged turn signal and windshield wiper switch .
Damaged windshield wiper motor .
Open circuitry.
Damaged windshield wiper control module.
Go to
Pinpoint Test C.
Windshield Wipers Inoperative at Interval Setting
Damaged turn signal and windshield wiper switch .
Open circuitry.
Damaged windshield wiper control module.
Go to
Pinpoint Test D.
Windshield Wipers Will Not Park at Proper Position
Damaged windshield wiper motor .
Damaged windshield wiper control module.
Damaged turn signal and windshield wiper switch .
Go to
Pinpoint Test E.
Windshield Wipers Continue to Run When Turn Signal and Windshield Wiper Switch Are Turned OFF
Damaged turn signal and windshield wiper switch .
Damaged windshield wiper motor .
Damaged windshield wiper control module.
Go to
Pinpoint Test F.