To address the B3703 trouble code, check the input circuit to ensure proper connections and functionality. This code indicates an issue with the intermittent wiper delay input circuit, which can affect wiper performance and lead to compromised visibility during adverse weather conditions.
First, inspect the wiring for any obvious damage, such as fraying or corrosion. A high or open circuit may result from disconnected or loose connections. Use a multimeter to test circuit continuity; this can reveal whether electrical signals are being transmitted correctly. If faults are found, repair or replace the affected components.
Next, verify the operation of the Body Control Module (BCM). A malfunctioning BCM can also trigger the B3703 code. Perform a scan of the BCM for any additional codes that may provide insight into the issue. If necessary, reprogram or replace the BCM to restore correct functionality.
Consider the intermittent wiper switch as well. A defective switch can prevent proper input to the BCM. Testing this component for functionality ensures it is operating as intended. Replacing a faulty switch can often resolve the B3703 code.
Understanding the B3703 Code
The B3703 code indicates an issue with the Intermittent Wiper Delay Input Circuit, specifically signaling a high or open condition within the Body Control Module (BCM). Addressing this code requires immediate attention to restore proper wiper functionality.
Common Symptoms
- Wipers not functioning at all.
- Delayed response in the wiper operation.
- Inconsistent wiper speeds.
- Wiper blades operate only at constant speed.
Troubleshooting Steps
- Check fuses related to the windshield wiper system to ensure they are intact.
- Inspect the wiring and connectors leading to the BCM and wiper motor for signs of damage or corrosion.
- Test the intermittent wiper switch; ensure it is functioning correctly and making proper contact.
- Use a multimeter to measure voltage and ground signals in the circuit. Look for irregularities that could indicate a fault.
- Scan the vehicle’s computer system for additional codes that may provide further context.
- If issues persist, consider replacing the BCM as a last resort, since it controls wiper settings.
Regular maintenance and thorough inspections can help prevent the occurrence of the B3703 code. Stay proactive in monitoring your vehicle’s electrical systems for early signs of trouble.
Common Symptoms Associated with B3703
When the B3703 code is triggered, several symptoms may arise indicating an issue with the intermittent wiper delay input circuit. Owners should be aware of these signs for timely diagnosis and repair.
Common Symptoms
- Wiper Malfunction: Wipers may not operate at all or might function sporadically, creating visibility issues during rain.
- Fixed Speed: Wipers could only operate at a single speed instead of varying speeds based on delay settings.
- Dashboard Warning Light: The vehicle’s dashboard may display a warning light related to the windshield wiper system.
- Electrical Issues: Other electrical components, particularly those connected to the Body Control Module (BCM), may exhibit strange behaviors or malfunctions.
Tips for Diagnosis
- Inspect wiring and connectors related to the wiper system.
- Check the BCM for any fault codes or signs of wear.
- Test the wiper motor and associated relays to ensure they operate correctly.
- Look for water ingress that could affect electrical connections.
Identifying these symptoms early can prevent further damage and ensure safe driving conditions. Regular maintenance and prompt attention to electrical issues can help keep your wiper system operational.
Diagnosis Steps for B3703 Error
Begin with a thorough visual inspection of the wiper delay switch and related wiring. Look for loose connections, corrosion, or damage. Address any issues before proceeding.
Step 1: Check the Wiper Delay Switch
- Test the switch for continuity using a multimeter.
- Ensure it operates correctly across all settings.
- If the switch is faulty, replace it to eliminate the possibility of an open circuit.
Step 2: Inspect Wiring and Connectors
- Follow the wiring harness leading to the Body Control Module (BCM).
- Look for signs of wear, fraying, or broken wires.
- Check connectors for tightness and corrosion.
After visual checks, employ an automotive scan tool to read the DTC codes. Confirm that B3703 is the only active error code related to the wiper system.
Step 3: Test BCM Input
- Access the BCM and test the input signal from the wiper switch.
- Verify that the BCM receives the correct voltage when the wiper delay switch is activated.
- If the voltage is missing, further investigate the wiring or switch.
Step 4: Check Ground Connections
- Locate the ground points for the wiper system.
- Ensure all ground connections are secure and free of rust.
- Test each ground point for continuity back to the battery.
If all components and connections appear functional, consider resetting the BCM. Clear the error code and test the system again to see if the fault returns.
Step 5: Review Continuity and Voltage
- Perform a final continuity test on all related circuits.
- Check voltage levels at various points in the system to identify drop or interruption.
- Utilize the wiring diagram for reference during testing.
Following these steps will help you accurately diagnose the B3703 error, ensuring a systematic approach to resolving issues within the wiper delay input circuit.
Identifying the Intermittent Wiper Delay System
Examine the wiper delay system by checking the vehicle’s manual for specific wiring diagrams related to the intermittent wiper function. Locate the Body Control Module (BCM) because it plays a crucial role in controlling wiper operations. The BCM receives input from the wiper switch and translates this into commands for the wipers.
Step-by-Step Diagnostic Process
- Inspect the wiper control switch for any signs of wear or damage. A malfunctioning switch can lead to high/open circuit issues.
- Test the wiring harness connecting the switch and BCM. Look for frayed wires, corrosion, or loose connections that might interrupt the circuit.
- Use a multimeter to measure voltage at the wiper switch and the BCM connector while activating the wiper system. Ensure there’s a consistent signal.
- Check the BCM for fault codes using a diagnostic scanner. Note any codes related to the wiper delay function and follow up with appropriate repairs.
- Examine any related fuses. A blown fuse could disrupt the power supply to the wiper system.
Common Issues and Solutions
- Faulty Wiper Control Switch: Replace if tests reveal malfunction.
- Damaged Wiring: Repair or replace damaged sections to restore continuity.
- BCM Malfunction: If the BCM fails diagnostic tests, consider reprogramming or replacing it.
- Blown Fuses: Replace any blown fuses immediately.
By following these steps, you can properly identify issues within the intermittent wiper delay system and take corrective action to restore functionality. Regular maintenance and timely diagnostics can prevent more severe problems in the future.
Wiring Diagram for Wiper Delay Input
To effectively troubleshoot the B3703 code related to the Intermittent Wiper Delay Input Circuit, refer to the wiring diagram. This diagram provides a clear representation of the connections involved in the wiper delay system.
The wiper delay input circuit typically involves several key components: the Body Control Module (BCM), the wiper switch, and the wiring harness. Start by locating the BCM, usually found under the dashboard or near the driver’s side kick panel. The wiper switch is typically mounted on the steering column or as part of the control panel.
Key Connections
Identify the input terminal on the BCM that corresponds to the wiper delay function. This terminal receives signals from the wiper switch. Ensure that the wires are intact and verify the pin configuration against the service manual for your specific vehicle model. If the circuit shows a high or open condition, check for continuity between the BCM and the wiper switch.
Testing the Circuit
Use a multimeter to test the voltage at the input terminal while manipulating the wiper switch. You should observe a fluctuating voltage signal that corresponds to the selected delay settings. If there is no signal, inspect the wiring for damage or corrosion. Addressing these issues can restore proper function and resolve the B3703 code.
Testing the BCM for Faults
Begin by disconnecting the vehicle’s battery to ensure safety while testing the Body Control Module (BCM). Locate the BCM in your vehicle; it’s commonly found under the dashboard or in the engine compartment.
Next, inspect the wiring harness and connectors for visible damage, corrosion, or loose connections. Clean any dirty contacts to ensure reliable communication. Use a multimeter to check for continuity in the wires associated with the intermittent wiper delay input circuit.
With the BCM connected, turn the vehicle’s ignition to the “ON” position without starting the engine. Utilize a scan tool to check for any trouble codes related to the BCM. If “B3703” appears, it indicates an issue with the intermittent wiper delay circuit.
Perform a voltage check at the input pin associated with the intermittent wiper delay. Expect a specific voltage range; consult the vehicle’s manual for the expected values. If voltage is absent or outside the specified range, further investigate the source. This could involve checking the wiper switch and associated wiring.
If the BCM shows no faults in wiring or voltage checks, reset the BCM using the scan tool. Observe if the issue persists after a reset. If the problem continues, the BCM may be defective and require replacement or reprogramming.
As a final step, make sure to reconnect the battery and test the wipers to confirm repair effectiveness. This systematic approach will effectively identify any faults within the BCM related to the intermittent wiper delay input circuit.
How to Inspect the Delay Input Circuit
Begin with disconnecting the vehicle’s battery to ensure safety while working with electrical components. Locate the Body Control Module (BCM) and the associated wiring harness for the intermittent wiper delay input circuit. Check the wiring for any visible damage, such as fraying or corrosion.
Next, utilize a multimeter to measure the resistance in the delay input circuit. Connect the multimeter probes to the appropriate pins in the wiring harness. Look for resistance readings within the specified range provided in the vehicle’s service manual.
Inspect the connectors for any signs of oxidation or loose connections. Clean the terminals with electrical contact cleaner if necessary. Allow the connectors to dry completely before reconnecting.
Perform a continuity test by ensuring there is no interruption in the wires from the delay input switch to the BCM. Disconnect the wires from both ends and measure continuity using the multimeter.
If readings are not within specifications, consider replacing the affected wiring or connectors. Reconnect all components securely and reattach the battery.
Finally, test the wiper system to ensure it operates correctly. Verify that the intermittent delay function works smoothly and responds appropriately to switch adjustments.
| Step | Action |
|---|---|
| 1 | Disconnect the battery |
| 2 | Locate the BCM and wiring harness |
| 3 | Visually inspect wiring for damage |
| 4 | Measure resistance with a multimeter |
| 5 | Inspect and clean connectors |
| 6 | Perform a continuity test |
| 7 | Replace damaged components if necessary |
| 8 | Reconnect components and test system |
Common Causes of High/Open Signal in B3703
Diagnosing a high or open signal in the B3703 system often points to specific issues that require immediate attention. The first common cause is a damaged or frayed wiring harness. Inspect the wiring closely for any signs of wear, cuts, or corrosion that might disrupt the signal flow.
Another frequent culprit is a faulty switch within the wiper control mechanism. If the switch does not make proper contact, it can lead to an open circuit, causing the B3703 code to trigger. Testing or replacing the switch can resolve this problem.
Ground Issues
Ground connections play a crucial role in the system’s operation. A loose or corroded ground can interrupt the signal, resulting in an open circuit. Ensure all ground connections are clean, tight, and free from rust.
Body Control Module (BCM) Malfunction
A malfunctioning BCM can also contribute to the B3703 code. If the module fails to process the input correctly, it may interpret it as an open circuit. Running diagnostic tests on the BCM can help identify any internal issues, enabling timely repairs or replacements.
Replacing Faulty Components
Begin with identifying the faulty component linked to the B3703 code. Typically, this involves the intermittent wiper delay switch or the Body Control Module (BCM). Ensure you have the correct replacement parts ready. Consult the vehicle’s service manual for specifications and compatibility.
Steps for Replacement
1. Disconnect the vehicle’s battery to ensure safety. This prevents any accidental electrical shorts during the repair.
2. Remove the wiper control switch from the steering column. Use a screwdriver to carefully detach any screws and connectors, taking care not to damage surrounding components.
3. If necessary, inspect the wiring harness for any signs of wear or corrosion. Replace any damaged wiring before installing the new switch.
4. Install the new wiper switch by connecting it to the same harness and securing it in place. Make sure all connections are tight to prevent future issues.
Testing the New Component
After completing the installation, reconnect the vehicle’s battery. Turn on the ignition and test the intermittent wiper function. Check for proper delays and ensure the wipers operate smoothly at various settings.
If the problem persists, the BCM may need to be programmed or replaced, depending on the vehicle model. Follow manufacturer guidelines for any programming requirements. Clear the diagnostic codes to verify the repair’s success.
Using a Multimeter to Diagnose B3703
Begin by setting your multimeter to the ohms (Ω) setting. Check the resistance between the intermittent wiper delay input circuit and the ground. A reading of infinite resistance indicates an open circuit, which may be the cause of the B3703 code.
Next, inspect the wiring harness connected to the Body Control Module (BCM) and the wiper switch. Look for any visible damage or corrosion. Use the multimeter to test continuity. Disconnect the harness, then connect one lead to the wiper delay input pin and the other lead to the corresponding pin at the BCM. A resistance reading below 5 ohms indicates a good connection.
If continuity is present, check the voltage at the wiper switch with the key in the ON position. Set the multimeter to the DC voltage (V) setting and connect the negative lead to ground. Probe the wiper switch terminal that leads to the BCM. A reading between 5 to 12 volts confirms the switch is functioning correctly.
If the voltage is absent, trace the circuit back toward the BCM and inspect for damaged wires or poor connections. Test each connection point for voltage to identify where the supply may be interrupted.
For further diagnosis, once all connections and voltage checks are complete, clear any fault codes from the system and perform a wiper operation test. If B3703 reappears, the BCM itself may require further evaluation or replacement.
Reprogramming the BCM After Repairs
After completing repairs on the BCM, reprogramming is critical to ensure all functions operate correctly. Connect the vehicle to a compatible diagnostic tool to begin the process. Refer to the manufacturer’s service manual for the exact steps required for your specific vehicle model.
Start by checking for any stored trouble codes. Clear these codes before proceeding with reprogramming. This step prevents any lingering issues from affecting the new programming.
Next, initiate the BCM reprogramming process using the diagnostic tool. Follow on-screen prompts carefully. This process typically includes verifying the current software version and downloading the latest software updates specific to your BCM.
Once the reprogramming is complete, perform a system calibration if required. Check all related systems, including intermittent wiper functionalities, to ensure they work seamlessly. Conducting a functional test confirms that repairs and reprogramming were successful.
Finally, document the reprogramming process and any changes made. Keeping accurate records aids in future diagnostics and repairs. Review the vehicle’s user manual or service documentation for any additional steps or recommendations from the manufacturer.
Preventative Maintenance for Wiper Systems
Inspect your wiper blades every six months for wear and damage. Look for cracks, splits, or loss of flexibility. Replace worn blades immediately to ensure optimal performance during adverse weather conditions.
Check the windshield wiper fluid reservoir regularly. Use a high-quality fluid to avoid streaking and potential damage to the system. Refill it as needed to maintain proper visibility.
Examine the wiper arm tension. Over time, the arms may loosen, leading to ineffective wiping. Adjust the tension or replace the arms if they do not sit securely against the windshield.
Inspect the wiper motor for any signs of corrosion or damage. Ensure all electrical connections are clean and secure to maintain functionality. Address any electrical issues promptly to prevent wiper failures.
Follow the manufacturer’s guidelines for cleaning the wiper blades. Use a soft cloth moistened with soapy water and avoid harsh chemicals. This practice extends the life of the blades and enhances performance.
Perform a full system check during regular vehicle maintenance. Pay attention to the delay input circuit. If you diagnose “Intermittent Wiper Delay Input Circuit High/Open,” ensure the Body Control Module (BCM) is functioning correctly and all connections are intact.
| Maintenance Task | Frequency |
|---|---|
| Inspect Wiper Blades | Every 6 Months |
| Check Wiper Fluid | Monthly |
| Inspect Wiper Arm Tension | Every 6 Months |
| Examine Wiper Motor | Yearly |
| Clean Wiper Blades | Monthly |
Adhere to these maintenance tips to keep your wiper system in peak condition. This diligence ensures safe driving through all weather conditions.
Case Studies of B3703 Fixes
Addressing the B3703 – Intermittent Wiper Delay Input Circuit High/Open (BCM) requires targeted approaches for effective results. Here are several case studies highlighting successful fixes.
Case Study 1: Wiring and Connector Inspection
A 2015 Chevrolet Malibu exhibited intermittent wiper issues along with the B3703 code. The diagnosis began with a thorough inspection of the wiring harness and connectors leading to the Body Control Module (BCM). Technicians identified corrosion at one of the connectors, which led to an open circuit. Cleaning the connector and applying a dielectric grease improved the connection, resulting in a permanent fix.
Case Study 2: BCM Reprogramming
A 2018 Ford Escape presented similar symptoms with the B3703 code. After verifying the inputs and outputs, the technician found that the BCM software was outdated. Reprogramming the BCM with the latest firmware resolved the issue, restoring full functionality to the intermittent wiper system.
| Vehicle Model | Symptoms | Solution |
|---|---|---|
| 2015 Chevrolet Malibu | Intermittent wiper operation | Cleaned connector; applied dielectric grease |
| 2018 Ford Escape | Intermittent wipers; B3703 code | BCM reprogramming |
Both case studies demonstrate the necessity of comprehensive diagnostics before jumping to conclusions about component failures. By focusing on potential wiring and software issues, technicians can frequently resolve the B3703 code effectively.
Tools Required for Troubleshooting
Equip yourself with the following tools to troubleshoot the B3703 – Intermittent Wiper Delay Input Circuit High/Open effectively:
Basic Tools
- Multimeter: Measure voltage, resistance, and continuity in the circuit.
- Screwdrivers: Philips and flat-head types for accessing panels and components.
- Pliers: Useful for gripping connectors and manipulating wires.
- Wire strippers: Prepare wires for connecting or testing.
Diagnostic Equipment
- OBD-II Scanner: Retrieve and interpret diagnostic trouble codes related to the BCM.
- Oscilloscope: Analyze the signal waveform from the wiper delay input circuit.
- Test Light: Verify the presence of voltage across connections.
- Power Probe: Check for voltage and ground availability in live circuits.
Having these tools on hand streamlines the troubleshooting process. After gathering your equipment, focus on checking the wiring harness for signs of damage, corrosion, or loose connections. This inspection can often reveal immediate issues with the input circuit.
Frequently Asked Questions About B3703
If you encounter a B3703 code, check for an open circuit or high signal in the intermittent wiper delay input circuit. Start by inspecting the wiring for damage or corrosion. Ensure that all connections are secure and free from moisture.
What symptoms indicate a B3703 code?
Common symptoms include malfunctioning wiper delay settings, which may cause the wipers to operate continuously or not at all. Other signs may include dashboard warning lights related to the windshield wipers.
How can I diagnose a B3703 issue?
Use a scan tool to confirm the B3703 code. Verify the circuit’s integrity by testing each connection with a multimeter. Check as well for proper voltage levels and resistance within the circuit. Inspect the Body Control Module (BCM) for faults, as it manages the wiper functions.
If diagnostics point to faulty components, consider replacing the wiper switch or the BCM itself. Ensure that any repairs are conducted with quality parts to maintain optimal vehicle performance.
Regular maintenance checks can prevent issues related to the wiper system. Creating a schedule for these checks helps identify potential problems before they escalate.
Resources for Further Research on BCM Issues
Explore specialized automotive diagnostic forums such as the iATN (International Automotive Technicians Network) for in-depth discussions and shared experiences regarding BCM malfunctions. Engage with experienced technicians who have dealt with similar intermittent wiper delay input circuit issues, gaining valuable insights into common troubleshooting methods.
Technical Service Bulletins (TSBs)
Access TSB databases through the manufacturers’ websites or resources like NHTSA (National Highway Traffic Safety Administration) to find official guidance related to BCM issues. TSBs often provide precise repair instructions, component specifications, and relevant recalls, which could offer crucial information when addressing specific problems.
Automotive Repair Manuals
Utilize resources like Chilton or Haynes manuals, which provide extensive technical details about BCM functionalities, wiring diagrams, and step-by-step diagnostic procedures. These manuals can help you understand the electrical components involved and assist you in performing accurate repairs or assessments.
