Wiper and Washer Symptom Diagnosis

Windshield Wiper and Washer

Condition	Possible Cause	Action
Wiper malfunctions	Faulty windshield wiper motor	Windshield Wiper Motor Operation Inspection
	Faulty wiper and washer switch	Wiper and Washer Switch Inspection
	Faulty system circuit (including relays and fuses)	Repair circuit and replace relay and/or fuse.
Washer malfunctions	Faulty washer hose (including check valve and connector) or nozzle	Check washer hose or nozzle for clogging and bend.
	Faulty washer pump	Washer Pump Inspection
	Faulty wiper and washer switch	Wiper and Washer Switch Inspection
	Faulty system circuit (including relays and fuses)	Repair circuit and replace relay and/or fuse.
Auto wiper malfunctions (if equipped)	Faulty rain / light sensor initial setup	Rain / Light Sensor Initialization (If Equipped)
	Faulty rain / light sensor	Inspection of Rain / Light Sensor and Its Circuit (If Equipped)
	Faulty BCM	Inspection of BCM and Its Circuits
	Faulty system circuits (including relays and fuses)	Repair circuit and replace relay and/or fuse.
	Faulty wiper and washer switch	Wiper and Washer Switch Inspection

Rear Wiper and Washer

Condition	Possible Cause	Action
Wiper malfunctions	Faulty rear wiper motor	Rear Wiper Motor Inspection
	Faulty wiper and washer switch	Wiper and Washer Switch Inspection
	Faulty system circuit (including relays and fuses)	Repair circuit and replace relay and/or fuse.
	Faulty BCM	Inspection of BCM and Its Circuits
Washer malfunctions	Blown fuse	Replace fuse and check for short circuit.
	Faulty washer hose (including check valve and connector) or nozzle	Check washer hose or nozzle for clogging and bend.
	Faulty washer pump	Washer Pump Inspection
	Faulty wiper and washer switch	Wiper and Washer Switch Inspection
	Faulty wiring or ground	Repair wiring.