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Harley Code B1328: How to Troubleshoot and Fix It

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Chase Manhattan

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Owner and Editor at The Wrench Network

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Hey y’all, it’s Chase Manhattan! I’m a life-long automotive and motorcycle enthusiast with a knack for diagnostics that I hope to share with you! Lately, I’ve been running my own motorcycle rental business, which you can read about here, and it has been a great experience that has allowed me to own numerous bikes that I probably couldn’t justify otherwise. Plus, it’s been a great way to experience new places while on vacation. If you haven’t heard of them before, I definitely recommend checking out the Riders-Share platform if you get the itch to ride while away from home, or if you want to explore a cheaper way to own and ride motorcycles!

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If you own a Harley-Davidson motorcycle and have experienced issues with your bike’s RHCM CB squelch down button, you may have encountered code B1328. This code indicates that the button is stuck and not functioning correctly. The RHCM CB squelch down button is located on the right-hand control module (RHCM) of your Harley-Davidson motorcycle and is responsible for adjusting the squelch level of your CB radio.

To diagnose the issue, you can read the Diagnostic Trouble Codes (DTC) on your Harley-Davidson without a diagnostic tool by using the trip reset button. The main steps in this process are as follows: turn the ignition switch to the “off” position, press and hold the trip reset button, and turn the run/stop switch to the “run” position. You can then release the trip reset button and wait for the DTCs to be displayed on the speedometer.

If you see code B1328 displayed, it is recommended that you take your motorcycle to a certified Harley-Davidson dealership or mechanic for further diagnosis and repair. Attempting to fix the issue yourself could cause further damage to your bike and may void any warranty or coverage you may have.

Understanding Harley Code B1328

If you’re experiencing issues with your Harley motorcycle and the check engine light is on, there’s a chance that you might have a B1328 code. This code refers to a “Device Power Circuit High” error, which can be caused by a variety of issues related to the ignition, battery, or BCM. In this section, we’ll take a closer look at the symptoms and possible causes of code B1328.

Symptoms of Code B1328

When your Harley motorcycle has a B1328 code, there are a few symptoms that you might experience. These can include:

If you’re experiencing any of these symptoms, it’s important to get your motorcycle checked out by a professional as soon as possible.

Possible Causes of Code B1328

There are several possible causes of code B1328, including:

If you suspect that your ignition switch or battery is the cause of the issue, it’s important to get them checked out and replaced if necessary. If the issue is related to the BCM, a professional will need to diagnose and repair the problem.

In conclusion, code B1328 can be a frustrating issue to deal with, but it’s important to get it checked out as soon as possible to prevent any further damage to your motorcycle. By understanding the symptoms and possible causes of this code, you can be better prepared to get your motorcycle back on the road.

Troubleshooting and Diagnostics

Initial Diagnostic Steps

If you have a Harley-Davidson motorcycle and it is showing a B1328 code, don’t worry, there are a few initial diagnostic steps you can take to troubleshoot the issue. Here are some things to check:

  • Check the battery voltage: Low voltage can cause a B1328 code to appear. Make sure your battery is charged and in good condition.
  • Check the wiring harness: Check the wiring harness for any damage or loose connections. A damaged wiring harness can cause a B1328 code to appear.
  • Check the RHCM CB: The RHCM CB (Right Hand Control Module Circuit Breaker) is a common culprit for B1328 codes. Check the RHCM CB for any damage or loose connections.

If none of these initial diagnostic steps resolve the issue, you may need to move on to advanced diagnostics.

Advanced Diagnostics for B1328

If you have tried the initial diagnostic steps and the B1328 code is still appearing, you may need to move on to advanced diagnostics. Here are some advanced diagnostics you can try:

  • Use a diagnostic tool: A diagnostic tool can help you pinpoint the exact cause of the B1328 code. You can use a diagnostic tool to read the DTC codes and troubleshoot the issue.
  • Check the RHCM: The RHCM (Right Hand Control Module) is another common culprit for B1328 codes. Check the RHCM for any damage or loose connections.
  • Check the front hand controls: The front hand controls can also cause a B1328 code to appear. Check the front hand controls for any damage or loose connections.

It’s important to note that a B1328 code can have multiple causes, so it may take some trial and error to diagnose the issue. If you are not comfortable with advanced diagnostics, it’s best to take your motorcycle to a professional mechanic for further assistance.

Electrical Components Related to B1328

If you are experiencing the B1328 code on your Harley-Davidson, it is likely related to a problem with the electrical components of your motorcycle. Specifically, the B1328 code indicates an issue with the device power circuit being too high. Here are some of the electrical components that may be related to this code:

Battery and Ignition System

The battery and ignition system are critical components of your motorcycle’s electrical system. If there is an issue with the battery or ignition system, it could cause the B1328 code to appear. Make sure that your battery is fully charged and that all connections are tight and secure. If your ignition system is not functioning properly, it may also cause the B1328 code to appear.

Body Control Module (BCM)

The Body Control Module (BCM) is responsible for controlling many of the electrical systems on your Harley-Davidson, including the lighting and signal systems. If there is an issue with the BCM, it could cause the B1328 code to appear. Make sure that all connections to the BCM are tight and secure.

Lighting and Signal Systems

The lighting and signal systems on your Harley-Davidson are also critical components of the electrical system. If there is an issue with the turn signal or brake lamp output, it could cause the B1328 code to appear. Make sure that all bulbs are functioning properly and that all connections are tight and secure.

In conclusion, the B1328 code on your Harley-Davidson is likely related to an issue with the electrical components of your motorcycle. Specifically, it could be related to the battery, ignition system, BCM, turn signal, or brake lamp output. Make sure that all connections are tight and secure and that all components are functioning properly. If the issue persists, it may be necessary to take your motorcycle to a professional mechanic for further diagnosis and repair.

Repair and Maintenance Tips

Common Repairs for B1328

If you are experiencing the B1328 code on your Harley-Davidson, it is important to address the issue as soon as possible. Here are some common repairs for this code:

  • Visually inspect the related wiring harness and connectors. Look for any signs of damage, such as frayed wires or loose connections. If you find any issues, repair or replace the damaged components.
  • Check the device power circuit for any high voltage readings. If you find high voltage readings, replace the affected device.
  • Check the RHCM (Radio/Hands-Free Control Module) CB Squelch Down button for any signs of damage or sticking. If you find any issues, replace the button.

Preventative Maintenance Strategies

To prevent the B1328 code from occurring in the future, here are some preventative maintenance strategies you can follow:

  • Regularly inspect the wiring harness and connectors for any signs of damage or wear. Repair or replace any damaged components as soon as possible.
  • Keep your RHCM clean and free of debris. Use a soft cloth to wipe down the control module periodically.
  • Avoid exposing your RHCM to extreme temperatures or moisture, as this can cause damage to the module.

By following these repair and maintenance tips, you can address the B1328 code on your Harley-Davidson and prevent it from occurring in the future. Remember to always prioritize regular maintenance and inspections to keep your bike running smoothly and safely.

Harley-Davidson Specific Diagnostic Error Codes

When your Harley-Davidson motorcycle encounters a problem, it may generate a diagnostic error code to help identify the issue. Here are some of the most common Harley-Davidson specific diagnostic error codes that you may encounter:

LHCM and RHCM Errors

The LHCM and RHCM refer to the left-hand and right-hand control modules on your Harley-Davidson motorcycle. These modules control various functions, such as the turn signals and brake lights. If you encounter an error code related to the LHCM or RHCM, it may indicate a problem with one of these modules.

Some common LHCM and RHCM error codes include:

  • B1103: LHCM internal fault
  • B1153: RHCM internal fault
  • B1200: Fuel sender open/high
  • B1210: Fuel sender short/low
  • B1300: Turn signal module (TSM) serial data high

If you encounter any of these error codes, it is recommended that you take your motorcycle to a Harley-Davidson dealer for further diagnosis and repair.

Radio and Audio System Errors

If your Harley-Davidson motorcycle is equipped with a radio or audio system, it may generate error codes related to these components. Some common radio and audio system error codes include:

  • B1328: Left speaker short to ground
  • B1329: Left speaker open
  • B1330: Right speaker short to ground
  • B1331: Right speaker open
  • B1341: Radio output short to battery

If you encounter any of these error codes, it is recommended that you check the wiring and connections to the affected components. If the wiring and connections are intact, you may need to replace the affected component.

Engine Control Module (ECM) Errors

The engine control module (ECM) is responsible for controlling various engine functions on your Harley-Davidson motorcycle. If you encounter an error code related to the ECM, it may indicate a problem with one of these functions.

Some common ECM error codes include:

  • B1101: Security antenna open
  • B1134: Starter output high
  • B1151: Ignition output high
  • B1152: Ignition output low
  • B1153: Engine temperature high
  • B1201: Fuel sender low/open
  • B1202: Fuel sender high
  • B1203: Fuel system voltage high
  • B1204: Fuel system voltage low
  • B1205: Fuel pump relay open
  • B1206: Fuel pump relay high
  • B1207: Fuel pump relay low
  • B1211: TSSM (turn signal security module) serial data high
  • B1212: TSSM serial data low
  • B1213: TSSM RAM error
  • B1214: TSSM ROM error
  • B1215: TSM/TSSM serial data low
  • B1216: TSM/TSSM serial data high
  • B1217: TSM/TSSM RAM error
  • B1218: TSM/TSSM ROM error

If you encounter any of these error codes, it is recommended that you take your motorcycle to a Harley-Davidson dealer for further diagnosis and repair.

Safety Systems and Code B1328

If you own a Harley-Davidson motorcycle, you know that safety is a top priority. One of the ways your bike ensures your safety is through its onboard diagnostic system. The system is designed to monitor various components and systems and alert you when something is wrong. One of the codes that you might see on your dashboard is B1328. In this section, we’ll take a closer look at what this code means and how it affects your safety systems.

Brake and Acceleration Safety

One of the key safety systems on your Harley is the brake and acceleration system. When you press the brake pedal or twist the throttle, the system sends a signal to the bike’s onboard computer. If there’s a problem with the system, the computer will trigger a fault code, such as B1328. This code indicates that there’s an issue with the device power circuit, which could affect your ability to brake or accelerate properly.

Security Antenna and Systems

Another important safety system on your Harley is the security system. The security system is designed to prevent theft and unauthorized use of your bike. If there’s a problem with the security system, the bike’s computer will trigger a fault code, such as B1328. This code indicates that there’s an issue with the security antenna output, which could compromise the effectiveness of the security system.

It’s important to note that B1328 can also indicate a problem with the brake lamp output or other components. If you see this code on your dashboard, it’s important to take your bike to a qualified technician to have it diagnosed and repaired. Ignoring the problem could compromise your safety and the safety of others on the road.

In conclusion, B1328 is a fault code that can indicate a problem with various safety systems on your Harley-Davidson motorcycle. If you see this code on your dashboard, it’s important to have your bike diagnosed and repaired by a qualified technician. By taking care of your bike and addressing any issues promptly, you can ensure that your Harley remains a safe and reliable mode of transportation.

Understanding Electrical Outputs

When it comes to Harley-Davidson motorcycles, the electrical system plays a crucial role in ensuring the bike functions properly. One of the most important aspects of the electrical system is the outputs. Understanding electrical outputs is essential to diagnosing and fixing issues with your Harley. In this section, we will discuss two common electrical outputs: Accessory Output and Headlamp and Brake Lamp Outputs.

Accessory Output Issues

The Accessory Output is responsible for powering any additional accessories that you may have installed on your Harley-Davidson motorcycle. This output can be affected by various issues, including a shorted high or a shorted low. If the Accessory Output is shorted high, it means that there is an excessive amount of voltage being sent through the output. On the other hand, if the Accessory Output is shorted low, it means that there is a low amount of voltage being sent through the output.

To diagnose issues with the Accessory Output, you can use a multimeter to test the voltage. If you find that the voltage is too high or too low, you may need to replace the Accessory Output.

Headlamp and Brake Lamp Outputs

The Headlamp and Brake Lamp Outputs are responsible for powering the headlamp and brake lamp on your Harley-Davidson motorcycle. If these outputs are not functioning properly, it can lead to safety issues while riding. One common issue with these outputs is an open circuit, which means that the circuit is not complete and electricity cannot flow through it.

To diagnose issues with the Headlamp and Brake Lamp Outputs, you can use a multimeter to test the continuity of the circuit. If you find that there is an open circuit, you may need to replace the output.

It is important to regularly check the electrical outputs on your Harley-Davidson motorcycle to ensure that they are functioning properly. By understanding the common issues with these outputs, you can diagnose and fix any issues that may arise.

Frequently Asked Questions

Common Rider Concerns

If you are a Harley-Davidson rider, you may have experienced issues with the Body Control Module (BCM). One of the most common issues is the B1328 diagnostic trouble code (DTC), which indicates a problem with the CB squelch down button on the front hand controls.

Many riders have reported that the CB squelch down button on their Harley-Davidson motorcycle is stuck, which triggers the B1328 DTC. This issue can be frustrating, as it can prevent you from using your CB radio. However, it is a relatively easy fix that can be done at home with a few basic tools.

Tips for Code B1328

If you are experiencing the B1328 DTC on your Harley-Davidson motorcycle, here are some tips to help you resolve the issue:

  • Check the front hand controls: The B1328 DTC is triggered by a problem with the CB squelch down button on the front hand controls. Check the button to see if it is stuck or not functioning properly. If it is, you may need to replace the button or clean it to get it working again.

  • Check the wiring: The B1328 DTC can also be triggered by a problem with the wiring to the CB squelch down button. Check the wiring to make sure it is not damaged or disconnected. If it is, you may need to repair or replace the wiring.

  • Check the BCM: If the above steps do not resolve the B1328 DTC, you may need to check the BCM. The BCM is responsible for controlling the CB radio and other electrical components on your Harley-Davidson motorcycle. If the BCM is faulty, it may need to be replaced.

By following these tips, you can resolve the B1328 DTC on your Harley-Davidson motorcycle and get back to riding with confidence. If you have any further questions or concerns, consult your Harley-Davidson dealer or a qualified mechanic.

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