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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2010MUSTANG BASE, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1238 (WIPER SYSTEM & WASHER SYSTEM)DIAGNOSIS AND TESTINGWIPERS AND WASHERSSYMPTOM TABLE

2010 Ford Mustang Base, 2D Coupe, Automatic

Symptom Table

2010 Ford Mustang Base, 2D Coupe, AutomaticSECTION Symptom Table

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM TABLE

Condition	Possible Sources	Action
The wipers are inoperative	Fuse(s) Circuitry Multifunction switch Wiper motor Wiper/washer module	Go To PINPOINT TEST A .
The wipers stay on continuously	Circuitry Multifunction switch Wiper/washer module	Go To PINPOINT TEST B .
The high/low wiper speeds do not operate correctly	Circuitry Multifunction switch Wiper motor Wiper/washer module	Go To PINPOINT TEST C .
The intermittent wiper speed does not operate correctly (high/low speeds OK)	Circuitry Multifunction switch Wiper/washer module	Go To PINPOINT TEST D .
The rain sensitive wipers do not operate	Rain sensor mounting bracket not secured to the windshield	CHECK for correct installation of the rain sensor mounting bracket. If needed, REPLACE the rain sensor mounting bracket with part number 19G382. REFER to the instructions included in the replacement rain sensor mounting bracket kit. NOTE: If the rain sensor mounting bracket is detached from the windshield, a new bracket must be installed. Do not reuse the bracket or use rear view mirror adhesive to adhere the bracket to the windshield.
	Wiper blades	INSPECT the wiper blades for streaking on the windshield. If needed, INSTALL new wiper blades.
	Multifunction switch Circuitry Rain sensor Wiper/washer module	Go To PINPOINT TEST E .
The rain sensitive wipers operate erratically/inconsistent operation/too sensitive or not sensitive enough to moisture	Wiper blades	INSPECT the wiper blades for streaking on the windshield. If needed, INSTALL new wiper blades.
	Foreign material on windshield, such as dirt, dust or bugs	CLEAN the windshield.
	Damaged windshield	INSTALL a new windshield. REFER to INSTALLATION .
	Rain sensor installed incorrectly	CHECK for correct installation of the rain sensor. If needed, REMOVE and INSTALL the rain sensor. REFER to Removal and Installation .
	Rain sensor damaged	REMOVE the rain sensor and INSPECT for damage. If needed, INSTALL a new rain sensor. REFER to Removal and Installation .
The wash and wipe function is inoperative	Circuitry Blocked washer hose/washer jet Washer pump motor Multifunction switch Wiper/washer module	If the washer pump is inoperative, Go To PINPOINT TEST F . If the washer pump is operative, INSTALL a new Wiper/Washer Module . TEST the system for normal operation.
The washer pump is inoperative	Circuitry Blocked washer hose/washer jet Washer pump motor Multifunction switch Wiper/washer module	Go To PINPOINT TEST F .
The headlamps do not illuminate when the wipers are on	Circuitry Wiper/washer module Smart Junction Box (SJB)	Go To PINPOINT TEST G .
The speed dependent interval mode does not operate correctly	Circuitry Wiper/washer module PCM	Go To PINPOINT TEST H .
The wipers will not park at the correct position	Circuitry Damaged wiper mounting arm and pivot shaft Pivot arm adjustment Wiper motor Wiper/washer module	Go To PINPOINT TEST I .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.