If you encounter B1473 error code, addressing the low-speed circuit motor failure in your vehicle’s wiper system requires methodical troubleshooting steps. Start by testing the wiper motor’s operation under various speed settings. A consistent failure at low speed indicates a potential short circuit, faulty relay, or wiring issue. Checking for voltage at the motor’s connectors can also reveal if the motor is receiving adequate power.
Inspect the wiring harness for signs of wear, corrosion, or loose connections that may disrupt the electrical flow. If everything appears intact but the problem persists, proceed to test the wiper relay, as a malfunctioning relay can prevent the motor from functioning correctly. Replace any defective components as needed.
After completing repairs, clear the error code using an OBD-II scanner and perform a functional test to ensure the wipers operate smoothly across all speeds. Regular maintenance of your wiper system can prevent such failures, so routinely check and clean wiper blades and inspect the motor for any signs of malfunction.
Understanding B1473 Error Code
B1473 indicates a failure in the low-speed circuit of the wiper motor. Diagnosis and repair require a systematic approach to ensure functionality is restored effectively.
Symptoms of B1473
- Wipers operate intermittently or fail to function.
- Reduced performance in low-speed settings.
- Potential noise from the wiper motor.
Troubleshooting Steps
- Verify the condition of the wiper motor.
- Inspect the wiring and connectors for damage or corrosion.
- Check the fuse related to the wiper motor circuit.
- Test the switch operation to ensure proper engagement.
- Examine the control module for faults if previous steps don’t resolve the issue.
Address each identified issue methodically to restore the wiper system to proper working order. Regular maintenance can prevent future occurrences of the B1473 error code.
Common Symptoms of Wiper Motor Issues
Observe your wipers closely. If they operate intermittently or fail to function at all, inspect the wiper motor. A stalled motor often indicates a deeper issue. Additionally, if the wipers move slowly or only work at higher settings, the low-speed circuit may be compromised.
Noisy wipers can signify mechanical wear. Listen for any grinding, clicking, or unusual sounds while in operation. These noises can indicate damaged components within the motor that need attention.
Check for irregular wiper movement. If they hesitate, skip across the windshield, or stop midway, this is a clear indication of a malfunctioning motor. Pay special attention to any inconsistent or jerky movements.
Another symptom is the presence of electrical problems. If the wipers work only when the headlights are turned on or exhibit erratic behavior, there may be issues with the engine ground or wiring connections.
| Symptom | Possible Cause |
|---|---|
| Wipers do not operate | Faulty wiper motor or electrical issue |
| Slow wiper movement | Worn motor or low-speed circuit failure |
| Noisy operation | Mechanical wear inside the motor |
| Irregular or jerky motion | Malfunctioning motor components |
| Electrical anomalies | Poor wiring or ground connection issues |
Regular maintenance can prevent these issues. Always ensure the wiper mechanism is clean and free from debris. Inspect the motor and electrical connections periodically to catch potential failures early.
If you experience one or more of these symptoms, consider consulting a professional to diagnose and resolve the problem effectively.
Diagnostic Tools for B1473 Code
Utilize an OBD-II scanner to easily read the B1473 code. This tool provides real-time data and helps in identifying specific issues with the Wiper Low Speed Circuit Motor. Make sure to choose a scanner compatible with your vehicle for precise readings.
Multimeter
A multimeter is essential for diagnosing electrical issues. Use it to check voltage at the wiper motor connector. Ensure the circuit is receiving the correct voltage, which should be between 12 to 14 volts. If the voltage is low, inspect the wiring and connections for faults.
Wiring Diagrams
Obtain accurate wiring diagrams for your vehicle model. These diagrams assist in understanding the circuit layout, identifying related components, and tracing any faults. Focus on connections between the wiper switch, motor, and relay.
- Check for damaged wires or corrosion.
- Inspect connectors for looseness or wear.
- Test relays for proper operation.
For additional clarity, utilize a circuit tester. This device helps confirm continuity in the circuits and verifies that the wiper motor is receiving the signal it needs to operate correctly.
Document findings and follow up on any repairs or replacements needed based on the diagnostic results. Regular maintenance and checks of the wiper system can prevent future issues related to the B1473 code.
Step-by-Step Guide to Inspecting Wiper Motors
Begin the inspection by ensuring the vehicle is parked on a level surface, and the ignition is turned off. Safety is paramount; disconnect the battery to prevent any electrical shorts while working on the wiper motor.
Visual Inspection
- Check the wiper motor for any visible damage, such as cracks or rust.
- Inspect the wiring harness and connectors for frays or corrosion.
- Ensure that the wiper arms and blades are properly attached and not bent.
Checking Motor Functionality
- Reconnect the battery to power the wiper system.
- Activate the wipers using the appropriate switch settings.
- Observe the motor’s operation at all speeds. If the motor fails to respond, note any strange noises or inconsistent functioning.
- If the motor does not operate, use a multimeter to test for voltage at the motor connector. Ensure you have power when the switch is engaged.
For further troubleshooting, remove the wiper motor from its mount to test it directly. Apply power using a direct connection to the battery. Confirm whether the motor runs correctly outside of the vehicle environment. If it operates correctly in this test, focus on the wiring and switch mechanisms.
Final Checks
- If the motor operates well but wipers still fail, check the linkage for binding or damage.
- Clean any accumulated dirt and debris that could interfere with movement.
Reassemble any components and ensure all connections are secure. Test the wiper system again before completing the inspection.
Wiring Checks for Low-Speed Circuit Problems
Begin by inspecting the wiring harness connected to the wiper motor. Look for any signs of wear, fraying, or corrosion. A damaged wire can disrupt the low-speed circuit and lead to malfunction.
Next, check all connectors for a secure fit. Loose or corroded connections may cause intermittent issues. Clean any corrosion using suitable electrical contact cleaner. Ensure that all connectors click into place firmly.
Use a multimeter to test the voltage and continuity in the circuit. With the ignition in the ON position, measure the voltage at the wiper motor connector. It should read between 12-14 volts. If the voltage is low, trace the wiring back to the fuse box and switch to locate any breaks or shorts.
Inspect the fuse related to the wiper motor circuit. A blown fuse could indicate an underlying issue. Replace it if necessary, but be cautious of recurring failures, which may point to a short circuit.
Examine ground connections as well. A poor ground can lead to malfunctions. Make sure the ground wire is securely attached and free of rust or paint that could obstruct proper contact.
If problems persist after checking the wiring, consider the possibility of a faulty wiper motor. Performing tests on the motor itself can determine if it requires replacement. Apply direct power to the motor to see if it operates correctly on both speeds.
These steps help isolate and resolve low-speed circuit issues effectively. Timely checking can prevent more complex repairs down the line.
How to Test Wiper Motor Voltage Supply
First, ensure the vehicle is off and the keys are removed from the ignition. This precaution prevents accidental electrical shocks or shorts. Locate the wiper motor, usually found near the base of the windshield, under the hood.
Tools Needed
- Digital multimeter
- Wire connectors (if necessary)
- Safety gloves
Testing Procedure
1. Set your multimeter to measure DC voltage. Disconnect the wiring harness from the wiper motor. This step isolates the motor from the vehicle’s electrical system.
2. Identify the power supply wire using the vehicle’s service manual. Connect the positive lead of the multimeter to this wire, and the negative lead to a solid ground point on the vehicle.
3. Turn the ignition to the “ON” position without starting the engine. Activate the wiper switch to the low-speed setting. Observe the multimeter reading.
| Voltage Reading | Interpretation |
|---|---|
| 12V or Close | Power supply to the motor is good |
| 0V | Power supply issue, check fuses or wiring |
| Below 12V | Possible wiring fault or weak battery |
If the voltage is adequate, reconnect the wiring harness and proceed to test the motor’s operation by switching through its various speeds. If it does not operate as expected, the motor itself may be faulty.
Always consult the vehicle’s repair manual for specific electrical diagrams and procedures tailored to the wiper system. This ensures accurate diagnostics and repair processes. Regular checks can prevent future issues with the wiper system.
Identifying Faulty Components in the Circuit
Start by testing the wiper motor for proper functionality. Use a multimeter to measure voltage at the motor terminals while activating the wipers. If no voltage is present, trace back to the switch. Inspect the switch for corrosion or damage, ensuring a solid connection.
Next, examine the wiring harness. Look for frayed or broken wires, which can disrupt the circuit. A continuity test can help identify these issues. If the wiring appears intact, inspect the connectors for dirt or corrosion that could impede electrical flow.
Check the relay associated with the wiper circuit. A faulty relay can prevent the motor from receiving power. Test the relay by swapping it with a similar functional relay in the vehicle. Verify if the wipers operate normally after the swap.
Look into the fuse related to the wiper circuit. If the fuse is blown, replace it and monitor for any reoccurrence of the issue. If the new fuse blows quickly, this indicates a short somewhere in the system. Investigate further to find any potential shorts in the wiring.
Lastly, assess if any other components, such as the wiper control module (if applicable), may be at fault. Use a scan tool to check for any diagnostic trouble codes that might provide insight into electronic failures. This can pinpoint issues in the communication between components.
Common Causes of B1473 Error Code
The B1473 error code often stems from specific issues within the wiper low-speed circuit. Start by checking the wiper motor itself. A failure in the motor may lead to insufficient functionality. Ensure the motor is receiving power; if it isn’t, investigate the wiring and connections for potential breaks or corrosion.
Next, examine the wiper control switch. A malfunctioning switch may send incorrect signals to the motor. Test the switch to see if it properly engages different speeds. Additionally, consider the wiper relay. A defective relay can disrupt the circuit’s operation, leading to the B1473 error code.
Faulty wiring also plays a key role. Inspect the harness and connectors for damage. Look for frayed wires or loose connections that might cause intermittent faults. Ensure all ground connections are secure and functioning as intended.
Finally, verify the vehicle’s body control module (BCM). If the BCM is not communicating effectively with the wiper circuit, it may trigger the error code. Reprogramming or replacing the BCM can resolve issues stemming from this component.
Replacing the Wiper Motor: A Detailed Process
Begin by gathering the necessary tools: a socket wrench set, screwdrivers, and safety glasses. Disconnect the vehicle’s battery to ensure safety while working on electrical components. Locate the wiper motor, typically found underneath the windshield cowl. Remove the cowl by unscrewing any fasteners, taking care to set them aside for reinstallation.
Removing the Old Motor
Once the cowl is off, detach the wiper arm by loosening the retaining nut. Use a puller tool if the arm is stubborn. With the arm removed, locate the motor’s mounting bolts, often a couple of screws or nuts. Unscrew them and carefully lift the motor out. Disconnect the wiring harness connected to the motor. Hold onto the old motor to compare it with the new unit.
Installing the New Motor
Position the new wiper motor in place, aligning it with the mounting holes. Secure it using the previously removed bolts. Reconnect the wiring harness, ensuring a snug fit to avoid electrical issues. Reattach the wiper arm, tightening the retaining nut firmly. Replace the windshield cowl and secure it with the original fasteners.
Reconnect the battery, then test the new motor by activating the wipers. Verify that they operate smoothly at both low and high speeds. If everything functions correctly, your wiper motor replacement is a success.
When to Consider Professional Diagnosis
If your wiper motor exhibits low-speed circuit failure, it’s time to consult a professional if the following signs appear:
Consistent Malfunctions
Repeated issues with your wipers failing to operate at low speed suggest underlying problems that require expert attention. If attempts to troubleshoot do not yield consistent results, consider seeking help.
Electrical Problems
Notice any electrical anomalies, such as blown fuses or flickering dashboard lights linked to wiper operation? These indications often point to more complex electrical circuitry issues best handled by a technician.
| Signs of Wiper Issues | Action Required |
|---|---|
| Wipers fail to start | Professional inspection needed |
| Inconsistent wiper speeds | Consult an expert |
| Electrical components malfunctioning | Seek a technician |
| Presence of unusual sounds | Immediate professional diagnosis |
Don’t ignore warning signs. A thorough inspection by a qualified technician not only ensures safety but also extends the lifespan of your vehicle’s wiper system.
Preventive Maintenance for Wiper Systems
Regularly inspect wiper blades for wear and tear. Look for cracks, splits, or rigidity, and replace them immediately if any damage is noticed. Damaged blades can smear or skip, diminishing visibility during rain.
Check the arms of the wiper system. Ensure they are not bent or corroded. If you find deformities, adjust or replace the arms to maintain proper contact with the windshield.
Cleaning and Lubrication
Keep the windshield and wiper blades clean. Dirt accumulation can damage the rubber of the blades. Use a mild cleaner for the windshield and a damp cloth for the blades. Additionally, apply a silicone lubricant to the wiper arm pivots to ensure smooth operation, which can prevent unnecessary motor strain.
Fluid Levels and Electrical System Check
Regularly check the windshield washer fluid level and top it up as needed. A full reservoir guarantees optimal functioning of the washer system. Inspect electrical connections for corrosion or wear. Ensure the wiper motor receives adequate power, as poor connections can lead to failure in low-speed operations.
Understanding the Role of Wiper Relay
The wiper relay plays a critical role in the operation of your windshield wipers. It acts as an electronic switch that controls the power sent to the wiper motor. When you activate the wiper switch, the relay engages, allowing electrical current to flow to the motor. This process ensures that your wipers operate smoothly and efficiently, especially in low-speed conditions.
Functionality and Importance
The relay is designed to handle higher electrical loads than a regular switch, which prevents wear and tear. It also protects the wiper circuit from voltage spikes, contributing to the system’s longevity. If the relay fails, the wipers may stop functioning entirely or operate erratically. Regular checks of the relay can help prevent unexpected failures during inclement weather.
Troubleshooting Tips
If you experience issues with your wipers, first inspect the relay. Testing it with a multimeter can reveal whether it is defective. If the relay is functioning but problems persist, investigate the wiring and connections supplying power to the relay and motor. Ensuring a secure and clean connection can resolve many wiper-related issues.
Replace a faulty relay promptly to maintain proper wiper function. This straightforward action not only improves visibility during rain or snow but also enhances your driving safety. Regular maintenance checks of your wiper system, including the relay, ensure reliable performance when needed most.
Impact of Environmental Factors on Wiper Performance
To enhance wiper effectiveness, regularly inspect the motor and blades, especially after exposure to extreme weather. Rain, snow, and ice can hinder performance and damage components.
Temperature Effects
Extreme temperatures can impact wiper functionality. High heat can lead to wear on rubber blades, causing cracks and reduced contact with the windshield. In cold conditions, ice can freeze the wiper mechanism, impeding movement. Ensure the use of high-quality, temperature-resistant wiper blades to mitigate these issues.
Debris and Contamination
Dust, dirt, and snow accumulation can obstruct the wipers’ path, reducing visibility. Regular cleaning of the windshield and wiper area is recommended. Also, consider using wiper fluid that combats grime and includes antifreeze properties to maintain clarity in various conditions.
Keeping these environmental factors in mind ensures optimal wiper performance and safety on the road.
Common Mistakes During Diagnosis and Repair
One major mistake is jumping to conclusions without thorough testing. Always verify the power supply and ground connections to the wiper motor. A lack of voltage could stem from a blown fuse, corroded connectors, or a faulty switch. Check these components before assuming the motor itself is defective.
Misinterpreting symptom codes can lead to unnecessary repairs. Be sure to reference the manufacturer’s service manual to accurately understand each code, including B1473. This prevents misdiagnosis and wasted time on parts that do not need replacement.
Skipping Visual Inspections
Visually inspecting the wiper assembly can reveal issues that scanners won’t catch. Look for damaged wiper arms, loose bolts, or buildup of debris that may obstruct movement. Addressing visible problems can save time and resources.
Ignoring Wiring Issues
Wiring problems often cause motor failures but are frequently overlooked. Inspect the wiring harness for signs of wear, shorts, or disconnections. Repairing or replacing damaged wires can restore proper function without needing to replace parts unnecessarily.
Always conduct final tests post-repair to ensure everything operates correctly. If the issue persists, reevaluate the steps taken and don’t hesitate to double-check components. Staying systematic and thorough prevents oversight and leads to a successful repair.
Wiring Diagrams for Wiper System Repair
Start with obtaining the correct wiring diagram specific to the vehicle model. This diagram is crucial for identifying circuits, components, and connections related to the wiper system.
Key Components to Identify
- Wiper Motor: Check the motor for proper operation and continuity.
- Switches: Inspect the wiper switch for signs of damage and ensure it makes proper contact.
- Relay: Verify the relay’s function and replace it if there’s no clicking sound when activated.
- Fuses: Locate and check the wiper system fuses; replace any that are blown.
- Wiring Harness: Trace the wiring harness for cuts or fraying that could disrupt power flow.
Steps for Repair
- Refer to the wiring diagram to identify the circuit layout and component identifiers.
- Use a multimeter to test continuity at various points in the circuit, focusing on the motor and switch connections.
- Replace any faulty components identified through testing, following the specifications outlined in the wiring diagram.
- Recheck all connections after replacing components to ensure everything is secure and properly connected.
- Test the wiper system after repairs by operating the wiper controls through all settings.
By following these steps and consulting the wiring diagram, you can efficiently troubleshoot and repair the wiper system, addressing issues such as the B1473 code effectively.
Cost Estimation for Fixing B1473 Issues
Repairing the B1473 Wiper Low Speed Circuit Motor failure typically ranges from $150 to $400. This estimate covers diagnostics, parts, and labor. An initial diagnostic fee often falls between $50 and $100, which most shops will apply to the final bill if you proceed with the repairs.
Replacement parts, such as the wiper motor or wiring harness, can cost anywhere from $100 to $300, depending on your vehicle make and model. Labor costs usually account for $100 to $200 of the overall expense, as this task may take 1 to 2 hours to complete based on complexity.
Consider potential additional charges for related issues, such as faulty switches or blown fuses. These might add $20 to $100 more to the total repair cost, based on parts and labor involved.
Regular maintenance of the wiper system can prevent such failures. Inspect wiper blades and motors periodically, as this may save money in future repairs. Keeping receipts and knowing your car’s history could also help in negotiations with service providers.
Always compare quotes from multiple repair shops to find the best price and service plan for addressing B1473 issues efficiently. Don’t hesitate to ask for warranties on parts and labor, which can provide peace of mind for future repairs.
Resources for Further Assistance and Information
If you’re experiencing issues related to the B1473 Wiper Low Speed Circuit Motor Failure, accessing the right information and resources can assist in resolving your challenges. Here are some valuable options:
- Service Manual: Consult your vehicle’s service manual for specific wiring diagrams and troubleshooting steps related to the wiper motor circuit.
- Diagnostic Tools: Utilize an OBD-II scanner to retrieve error codes that may provide insight into the Wiper Low Speed Circuit issue. Some scanners also offer live data monitoring.
- Forums and Online Communities: Engage with platforms like Reddit, automotive forums, or specialized groups on Facebook where enthusiasts share experiences and solutions. Search for threads specifically about the B1473 code.
- Local Mechanics: Visit a trusted automotive repair shop for assistance. Mechanics can perform diagnostics to identify whether the problem lies within the motor, switch, or wiring.
- YouTube Tutorials: Find step-by-step video guides on how to diagnose and fix wiper motor issues. Visual instructions can clarify complicated processes.
Exploring these resources equips you with knowledge and support to address the motor failure effectively. Whether you prefer DIY solutions or professional help, the information is available to guide your next steps.
