B1437 Code Meaning, Symptoms, Causes and How to Fix

The B1437 code indicates a potential issue with the Wiper Hi/Low Speed Relay Coil. Symptoms of this problem may include an illuminated engine light or service engine soon warning light.

The causes of this code can vary, but common culprits include a faulty relay coil or electrical connection issues.

To fix the issue, it is recommended to first check and repair any loose or damaged electrical connections.

If the issue persists, replacing the faulty relay coil may be necessary.

It is important to address this problem promptly to prevent further damage.

What does it mean

The B1437 code indicates a fault in the Wiper Hi/Low Speed Relay Coil, monitored by the BCM. Possible causes include a faulty relay coil, wiring issues, or poor electrical connections.

Inspect the wiring and connectors for damage, and check for broken or corroded pins.

Regular maintenance of the wiper system can help prevent code recurrence.

what are the symptoms

The B1437 code is associated with certain symptoms that drivers should be aware of. These symptoms include the Engine Light or Service Engine Soon Warning Light turning on. These warning lights indicate that there is a problem with the Wiper Hi/Low Speed Relay Coil, which is monitored by the Body Control Module (BCM).

Here are four important things to know about the symptoms of the B1437 code:

1. The Engine Light or Service Engine Soon Warning Light will be illuminated.
2. The windshield wipers may not work properly, operating at a single speed or not working at all.
3. The intermittent wiper setting may not function as intended.
4. Other electrical components related to the wiper system, such as the washer pump or wiper motor, may also be affected.

To address the B1437 code, it is recommended to diagnose and fix the underlying causes. Unfortunately, there may not be any temporary solutions available to address the code. To prevent the B1437 code from occurring again, regular maintenance and inspections of the wiper system and related components are advised.

What are the causes

The B1437 code can be caused by various factors related to the Wiper Hi/Low Speed Relay Coil and its associated components. Here are four potential causes to consider when diagnosing the code:

1. Faulty Wiper Hi/Low Speed Relay Coil: A malfunctioning relay coil can trigger the B1437 code. Check the coil for signs of damage or wear.
2. Issues with Wiper Hi/Low Speed Relay Coil harness: An open or shorted harness can disrupt the proper functioning of the relay coil. Look for any damage or connectivity problems in the harness.
3. Poor electrical connection in the Wiper Hi/Low Speed Relay Coil circuit: Ensure that all electrical connections related to the relay coil are securely connected and free from corrosion.
4. Faulty Body Control Module (BCM): The BCM plays a crucial role in monitoring the Wiper Hi/Low Speed Relay Coil. A malfunctioning BCM can trigger the B1437 code.

When diagnosing the B1437 code, it is important to avoid common mistakes such as overlooking damaged components or failing to check for broken, bent, pushed out, or corroded connector pins.

What Tools are Needed to diagnose

To diagnose the B1437 code, you will need diagnostic scan tools and multimeters. These tools are important for finding out what is causing the code to appear.

Here are four important things to remember when diagnosing the B1437 code:

1. Diagnostic scan tools: These tools help you get the trouble codes from the car's computer system. They give you information about the specific issues related to the code and help you find the faulty parts.
2. Multimeters: Multimeters are used to measure voltage, resistance, and continuity in the electrical circuits. They help you test the wiper hi/low speed relay coil and its related parts to make sure they are working correctly.
3. Visual inspection: While specialized tools are needed for accurate diagnostics, sometimes you can see obvious signs of damage or loose connections just by looking. Checking the wiring and connectors can help you find any visible issues that might be causing the B1437 code.
4. Common misconceptions: It's important to address common misunderstandings about diagnosing the B1437 code without special tools. While basic inspection can be helpful, advanced diagnostic tools are needed for a thorough diagnosis. Relying only on visual inspection or guesswork can lead to wrong conclusions and potential misdiagnosis.

How to fix Step by Step

Step 1: Use diagnostic scan tools and multimeters to troubleshoot the B1437 code.

Step 2: Visually inspect the wiring harness and connectors for any damage.

Step 3: Look for any damaged components related to the B1437 code.

Step 4: Check for broken, bent, pushed out, or corroded connector pins.

Step 5: Test the Wiper Hi/Low Speed Relay Coil using a multimeter.

Step 6: Measure the resistance of the coil and compare it to the manufacturer's specifications.

Step 7: If the resistance is not within the acceptable range, replace the Wiper Hi/Low Speed Relay Coil.

Step 8: Check the Body Control Module (BCM) for any faults.

Step 9: Ensure that the BCM is functioning correctly.

What are the Common Diagnosis Mistakes

Common diagnosis mistakes can happen when technicians don't thoroughly inspect the wiring harness and connectors for damage. This can result in overlooking potential causes of the B1437 code. To avoid these mistakes, it's important to follow proper repair procedures.

Here are four common diagnosis mistakes to be aware of:

1. Not visually inspecting the wiring harness and connectors: This can cause missing damaged components or broken, bent, pushed out, or corroded connector pins.
2. Neglecting to check for poor electrical connections: A poor electrical connection in the Wiper Hi/Low Speed Relay Coil circuit can trigger the B1437 code. Therefore, it's crucial to ensure all connections are secure.
3. Overlooking the possibility of a faulty Body Control Module (BCM): The BCM plays an important role in monitoring the Wiper Hi/Low Speed Relay Coil. So, it should not be ignored as a potential cause of the code.
4. Not considering other potential causes: While the B1437 code is commonly associated with the Wiper Hi/Low Speed Relay Coil, it's important to consider other factors that may contribute to the issue, such as faulty relays or wiring elsewhere in the system.

What is the Repair Cost

The cost to repair the B1437 code can vary depending on factors such as location, vehicle make and model, and engine type. It may involve replacing a faulty relay coil, repairing or replacing wiring harnesses and connectors, or addressing issues with the body control module (BCM).

Labor rates and diagnosis time can range between $75 and $150 per hour.

Regular maintenance and inspections are advised to prevent code recurrence.

Can I drive safely with this code?

Driving safely with the B1437 code is not recommended. The code indicates a fault in the Wiper Hi/Low Speed Relay Coil, which can affect the wiper system's functionality. It may lead to reduced visibility during bad weather.

Clearing the code without fixing the issue won't resolve the problem.

Conclusion

In conclusion, the B1437 code indicates a potential issue with the Wiper Hi/Low Speed Relay Coil. It is important to address this issue promptly to prevent further damage.

The causes of this code can vary, including a faulty relay coil, open or shorted harness, poor electrical connection, or a faulty BCM. Diagnosing and fixing the problem may require inspecting the wiring harness and connectors, checking for damaged components or connector pins, and using appropriate diagnostic tools.

The cost to diagnose and repair this code may vary depending on factors such as location, vehicle make and model, and engine type.