B1473 — Wiper Low Speed Circuit Motor Failure #

Note: The code description may differ depending on the manufacturer. Always refer to your service manual or trusted OEM (Original Equipment Manufacturer) sources for vehicle-specific definitions.

• Ford/Lincoln: Wiper Low Speed Circuit Motor Failure
• Chrysler: Front Wiper Motor Low Speed Circuit
• Mazda: Wiper Motor Low Speed Circuit Malfunction
• Jaguar/Land Rover: Windscreen Wiper Motor Low Speed Circuit Fault

Summary of Code B1473 #

B1473 is a diagnostic trouble code (DTC) that indicates the vehicle’s onboard computer has detected a problem in the wiper motor low speed circuit. This circuit controls the operation of your windshield wipers at their low speed setting, which is essential for light rain or mist. When the circuit is faulty, you may notice your wipers do not work as expected, especially at lower speeds. The code is triggered when the control module senses an open, short, or excessive resistance in the low speed circuit. Prompt attention is important, as impaired wiper function can impact your driving visibility and safety.

Common Symptoms for Code B1473 #

Drivers and technicians encountering code B1473 usually notice issues with the windshield wipers, especially at their lowest speed setting. The symptoms can appear suddenly or intermittently, depending on the underlying cause. If ignored, they may worsen over time or extend to other wiper functions.

• Wipers do not operate at low speed
• Wipers only function at high speed
• Wipers fail to return to their “park” position
• Unusual noises or erratic movement from the wiper motor
• Intermittent wiper operation or complete non-functioning
• Illuminated check engine or warning light (in some vehicles)

Probable Causes for Code B1473 #

Several issues can trigger the B1473 code. They typically relate to wiring, connections, the wiper motor itself, or the vehicle’s control module. Understanding the most common causes helps prioritize your troubleshooting efficiently.

1. Faulty wiper motor—internal failure or worn brushes in the low speed circuit
2. Open or shorted wiring/connectors in the low speed circuit
3. Corroded or loose electrical connections at the wiper motor
4. Blown fuse or faulty relay related to the wiper system
5. Defective wiper switch or multifunction control stalk
6. Malfunctioning BCM (Body Control Module) or relevant control module

Step-by-Step Diagnosis for Code B1473 #

A systematic approach is crucial for diagnosing B1473 efficiently. Always observe safety precautions—disconnect the battery when working with wiring and electrical components.

• Step 1: Use a scan tool to confirm the presence of B1473 and check for related codes.
• Step 2: Inspect the wiper fuse and relay; replace if blown or faulty.
• Step 3: Visually examine the wiper motor, harness, and connectors for corrosion, loose pins, or damage.
• Step 4: Using a multimeter, check for voltage and ground at the wiper motor low speed circuit.
• Step 5: Test the wiper motor directly by applying battery voltage to the low speed terminal; observe operation.
• Step 6: If wiring and motor are functional, test the wiper switch and related controls.
• Step 7: As a last resort, check the BCM or relevant control module for faults or update needs.

Possible Repairs for Code B1473 #

The correct repair depends on the root cause identified during diagnosis. Always use OEM-quality parts and follow manufacturer procedures when replacing components.

• Replace faulty wiper motor if internal failure is detected
• Repair or replace damaged wiring or connectors in the low speed circuit
• Clean and secure any corroded or loose electrical contacts
• Replace blown fuse or defective relay associated with the wiper system
• Replace defective wiper switch or multifunction control stalk if found faulty
• Update or replace the BCM or relevant control module if it’s malfunctioning

Can You Drive with Code B1473? #

Limited: While your vehicle may remain operational, driving with a non-working or unreliable wiper low speed function is not recommended—especially in wet, misty, or unpredictable weather. Reduced visibility can quickly become hazardous. If you must drive, do so only in clear conditions and address the issue as soon as possible to maintain safety.

Vehicles Most Commonly Affected by Code B1473 #

B1473 is most frequently reported on vehicles from manufacturers using similar wiper circuit designs and diagnostics. While it can appear on various makes, certain models are more prone due to part aging or common design traits.

• Ford F-Series, Escape, Fusion
• Lincoln MKZ, MKX
• Mazda 3, Mazda 6, CX-5
• Chrysler Town & Country, Dodge Caravan
• Jaguar XF, Land Rover Freelander/Evoque

Common Mistakes & Best Practices for Code B1473 #

Misdiagnosis can lead to unnecessary part replacements or recurring faults. Following proven diagnostic routines and using OEM wiring diagrams can save time and frustration.

• Replacing the wiper motor without checking wiring and connectors—always inspect the entire circuit first
• Overlooking corrosion at connectors, especially in humid climates
• Ignoring related codes or symptoms that may indicate a broader control module issue
• Failing to reset the code after repair—always verify operation and clear DTCs
• Not using OEM or high-quality replacement parts, leading to premature failures

FAQ Express for Code B1473 #

For quick answers to the most common concerns about B1473, see below:

• Q: Can a faulty wiper relay trigger code B1473?
  A: Yes, a bad relay can interrupt the low speed circuit, causing this code. Always check relays early in the diagnostic process.
• Q: Will replacing the wiper blades fix this code?
  A: No, B1473 relates to the electrical circuit and motor operation, not the blades themselves. Blade replacement will not resolve this code.