If you own a Harley-Davidson motorcycle, you may have encountered the B1325 code at some point. This code indicates a problem with the RHCM (Radio/Headset/Navigation Communication Module) down button being stuck. When this happens, your motorcycle’s BCM (Body Control Module) will detect the issue and trigger the B1325 code, causing your check engine light to turn on.

The RHCM is responsible for controlling your motorcycle’s audio and communication systems, including the radio, headset, and navigation. If the down button on the module is stuck, it can cause issues with these systems and trigger the B1325 code. This code can also be caused by a low or high voltage on the control module’s power circuit.

If you encounter the B1325 code on your Harley-Davidson, it’s important to address the issue as soon as possible. Ignoring the problem can lead to further damage to your motorcycle’s systems and potentially cause safety issues while riding. In the following sections, we’ll explore the potential causes of the B1325 code and how to troubleshoot and fix the issue.

Understanding Harley Codes

If you own a Harley-Davidson motorcycle, you may have come across diagnostic trouble codes (DTCs) at some point. These codes are used by the onboard diagnostic system to indicate a problem with a specific system or component. Understanding these codes is crucial for troubleshooting and fixing issues with your motorcycle. In this section, we’ll provide you with an overview of Harley codes and what they mean.

Diagnostic Trouble Codes (DTCs)

Diagnostic Trouble Codes (DTCs) are alphanumeric codes that are used by the onboard diagnostic system to indicate a problem with a specific system or component. Harley-Davidson uses a combination of letters and numbers to represent different systems and components. For example, the letter “P” is used for powertrain-related codes, while the letter “B” is used for body-related codes. The following numbers give more specific information about the issue.

Body Control Module (BCM)

The Body Control Module (BCM) is a component in Harley-Davidson motorcycles that controls various electrical functions, such as the lighting system, horn, and turn signals. When a problem is detected with the BCM, a code beginning with the letter “B” is generated.

If you encounter the B1325 code, it means that the voltage on the power circuit for the control module is low or high. This can be caused by a variety of factors, such as a faulty BCM or a loose connection. To diagnose and fix this issue, you will need to use specialized diagnostic tools and refer to the Harley-Davidson trouble code chart or consult the service manual provided by the manufacturer.

In conclusion, understanding Harley codes is crucial for troubleshooting and fixing issues with your motorcycle. By using the information provided by the onboard diagnostic system and referring to the Harley-Davidson trouble code chart or service manual, you can diagnose and fix problems with your motorcycle’s systems and components.

Common Symptoms of Code B1325

If you are experiencing issues with your Harley motorcycle and are seeing the B1325 code, it is important to understand the symptoms associated with it. This code is related to electrical issues and could be caused by a variety of problems.

Electrical Issues

One of the most common symptoms of code B1325 is electrical issues. This could include all body control functions failing, the instrument cluster being deactivated, and other electrical components not working properly. If you are experiencing any of these issues, it is important to have your motorcycle inspected by a professional mechanic.

Ignition Switch Problems

Another symptom of code B1325 is ignition switch problems. If your ignition switch is faulty, it can cause this code to appear. You may notice that your motorcycle is having trouble starting or that the engine is stalling. If you suspect that your ignition switch is causing this code, it is important to have it inspected and replaced if necessary.

It is important to note that these symptoms may not always be caused by code B1325. There could be other underlying issues that are causing these problems. If you are unsure of what is causing your motorcycle’s issues, it is best to have it inspected by a professional mechanic.

In conclusion, code B1325 can cause a variety of symptoms related to electrical issues and ignition switch problems. If you are experiencing any of these symptoms, it is important to have your motorcycle inspected by a professional mechanic to determine the underlying cause of the problem.

Troubleshooting Code B1325

If your Harley is displaying the B1325 diagnostic trouble code, it means that there is a problem with the control module power circuit voltage. This can be caused by a number of issues, such as a low or high voltage on the power circuit, or a malfunction in the HVAC system. Here are some initial steps you can take to troubleshoot the problem:

Initial Steps

1. Check the battery voltage: A low battery voltage can cause the B1325 code to appear. Use a multimeter to check the voltage of your battery. If it is below 12 volts, recharge or replace the battery.

2. Inspect the control module: Check the control module for any signs of damage or corrosion. If it appears damaged, it may need to be replaced.

3. Check the wiring: Inspect the wiring for any signs of damage or corrosion. Make sure all connections are secure and free of debris. If the wiring appears damaged, it may need to be repaired or replaced.

If these initial steps do not resolve the issue, you may need to perform more advanced diagnostics.

Advanced Diagnostics

1. Use a scan tool: A scan tool can help you identify the specific cause of the B1325 code. It can also help you clear the code once the issue has been resolved.

2. Check the HVAC system: The B1325 code can be caused by a malfunction in the HVAC system. Check the temperature sensor circuit to make sure it is functioning properly. If it is not, it may need to be repaired or replaced.

3. Check other control modules: The B1325 code can be triggered by other control modules in the vehicle. Check the sensing and diagnostic module (SDM) and other control modules to make sure they are functioning properly. If they are not, they may need to be repaired or replaced.

By following these troubleshooting steps, you can diagnose and repair the B1325 code on your Harley. Remember to always use caution when working on your vehicle and consult a professional if you are unsure about any aspect of the repair process.

Electrical Components Involved

When it comes to the B1325 code on your Harley, there are a few electrical components that you should be aware of. These components can play a role in triggering the code and can help you diagnose the issue.

Battery and Charging System

The battery and charging system are essential components of your motorcycle’s electrical system. If there is an issue with either of these components, it can cause the B1325 code to appear.

To check the battery and charging system, you can use a multimeter to test the voltage. The voltage should be between 12.6 and 14.6 volts when the engine is running. If the voltage is outside of this range, it could indicate a problem with the battery or charging system.

Speakers and Audio Faults

The B1325 code can also be triggered by faults with the speakers or audio system on your motorcycle. Specifically, the code can be triggered by a front left speaker open or a rear left speaker open.

To diagnose this issue, you will need to test the speakers and audio system. You can do this by checking the wiring and connections for any damage or loose connections. You can also use a multimeter to test the resistance of the speakers.

If you find that there is an issue with the speakers or audio system, you may need to replace the faulty component. This can be done by purchasing a replacement speaker or audio system and installing it on your motorcycle.

By understanding these electrical components and how they can trigger the B1325 code, you can diagnose and fix the issue on your Harley. Whether it’s a problem with the battery, charging system, or speakers, you can take the necessary steps to get your motorcycle back on the road.

Code B1325 Specifics

If you own a Harley motorcycle and the check engine light is on, then you might have a B1325 code. This code is related to the voltage on the power circuit for the control module being low or high. Here are some specifics about the B1325 code that you should know.

Voltage Irregularities

The B1325 code is a manufacturer-specific diagnostic trouble code that is related to Harley motorcycles. It occurs when the vehicle system detects that the voltage on the power circuit for the control module is low or high. When this happens, the check engine light illuminates, and the B1325 code is stored as a fault.

There are several reasons why the voltage on the power circuit for the control module might be irregular. For example, there might be an open or shorted circuit, or the radio voltage might be too high or too low. If you suspect that any of these issues might be causing the B1325 code, then you should take your motorcycle to a qualified mechanic for further inspection.

Circuit Malfunctions

The B1325 code can also occur when there is a malfunction in the circuitry of the control module. Specifically, it is related to the power circuit voltage being either too low or too high. This can happen when the sensing and diagnostic module (SDM) detects a battery voltage that falls below 9 volts for longer than 5 consecutive seconds.

To fix the B1325 code, you need to diagnose the underlying issue that is causing the voltage irregularities or circuit malfunctions. This might involve checking the battery, the wiring, or the control module itself. If you are unsure how to diagnose or fix the B1325 code, then you should seek help from a qualified mechanic.

In summary, the B1325 code is a diagnostic trouble code that is related to voltage irregularities or circuit malfunctions in the power circuit for the control module of a Harley motorcycle. If you suspect that your motorcycle might have this code, then you should take it to a qualified mechanic for further inspection and repair.

Repair and Maintenance

If you are experiencing the B1325 code on your Harley-Davidson, there are a few repair and maintenance procedures that you can follow to fix the issue. In this section, we will cover some of the most common procedures that you can perform to repair your bike and get it back on the road.

Replacing Faulty Components

One of the most common causes of the B1325 code is a faulty Body Control Module (BCM). If your BCM is malfunctioning, it can cause the voltage on the power circuit to be too low or too high, which will trigger the B1325 code. To fix this issue, you may need to replace the BCM.

To replace the BCM, you will need to first locate it on your bike. The BCM is typically located under the seat or behind the side cover. Once you have located the BCM, you will need to remove it from your bike and replace it with a new one.

BCM Repair Procedures

If you are experiencing the B1325 code and you suspect that your BCM is malfunctioning, you may be able to repair it rather than replacing it. To repair the BCM, you will need to first diagnose the issue and determine what is causing the malfunction.

One common issue that can cause the BCM to malfunction is a loose or damaged connector. If you suspect that this is the issue, you can try cleaning the connector and tightening any loose connections. If this does not resolve the issue, you may need to replace the connector.

Another issue that can cause the BCM to malfunction is a damaged circuit board. If this is the case, you may need to replace the circuit board or repair any damaged components.

In conclusion, the B1325 code can be a frustrating issue to deal with, but there are a few repair and maintenance procedures that you can follow to fix the issue. Whether you need to replace your BCM or repair it, following these procedures can help you get your bike back on the road and running smoothly.

Preventive Measures

To prevent the B1325 code from appearing on your Harley, regular maintenance is necessary. Here are a few preventive measures that you can take to avoid the error code:

Check the Battery Cables

Ensure that the battery cables are tightly connected to the battery and are not damaged. Loose or damaged cables can cause voltage issues, which can trigger the B1325 code.

Inspect the Starter Solenoid

Check the starter solenoid for any loose starter shield that may be contacting the starter’s battery cable terminal ring. This condition can cause a shorted B+ battery cable, which can lead to the B1325 code.

Maintain the BCM Ground

The B1325 code can also occur due to a poor BCM ground at G218. Regularly inspect and maintain the BCM ground to prevent voltage issues that can trigger the code.

Keep the Temperature Sensor Clean

The B1325 code is related to the temperature sensor circuit in the HVAC system. Ensure that the temperature sensor is clean and free from debris. Dirt and debris can affect the sensor’s signal, leading to the code.

Regularly Check the Control Module Power Circuit

Regularly check the control module power circuit for voltage issues. Low or high voltage can trigger the B1325 code. If you notice any voltage issues, take your Harley to a professional mechanic for repairs.

By taking these preventive measures, you can avoid the B1325 code and ensure that your Harley runs smoothly. Regular maintenance is essential to keep your bike in top condition.