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Harley Code B1320: Understanding and Resolving the Issue

by

Chase Manhattan

Chase Manhattan Avatar
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’re a Harley-Davidson rider, you may have experienced a moment when your bike’s check engine light turned on. If you’ve tried to diagnose the problem yourself, you may have come across the Harley Code B1320. This code indicates that the RHCM info button on your front hand controls is stuck.

The RHCM stands for “Right Hand Control Module,” which is the module that controls the functions on the right-hand side of your handlebars. This includes the info button, which is used to cycle through the different information screens on your bike’s display. If this button is stuck, it can cause the check engine light to turn on and prevent you from accessing important information about your bike’s performance.

Luckily, there are ways to fix this issue. Depending on the severity of the problem, you may be able to fix it yourself by disassembling the RHCM and cleaning the button contacts. However, if the issue persists, you may need to replace the RHCM entirely. It’s important to address this issue promptly to ensure that your bike is running smoothly and that you can access all of the information you need while riding.

Understanding Harley Diagnostic Codes

If you own a Harley-Davidson motorcycle, it’s essential to understand the diagnostic trouble codes (DTCs) that may appear on your bike’s dashboard. These codes are an important tool that helps you identify the root cause of any issues that may arise with your motorcycle. In this section, we’ll take a look at how to decode DTCs and some of the most common Harley trouble codes, including B1320, B1103, B1153, B1200, B1210, B1211, B1212, and B1213.

Decoding DTC

DTCs are alphanumeric codes that appear on your bike’s dashboard when a problem is detected. These codes consist of a letter followed by four digits, such as B1320. The letter denotes the system that has detected the problem, while the digits provide more specific information about the issue. For example, the letter B indicates a problem with the body control module (BCM), while the digits 1320 indicate a specific fault within that system.

To decode a DTC, you’ll need to consult your bike’s owner’s manual or a diagnostic code chart. Once you’ve identified the code, you can use it to diagnose and repair the issue.

Common Harley Trouble Codes

Here are some of the most common Harley trouble codes and what they mean:

  • B1320: This code indicates a problem with the BCM ignition run/start input circuit. This issue can cause your bike to fail to start or stall while riding.

  • B1103: This code indicates a problem with the fuel sender circuit. This issue can cause inaccurate fuel level readings and may result in your bike running out of fuel unexpectedly.

  • B1153: This code indicates a problem with the side stand switch circuit. This issue can cause your bike to stall when you put it into gear or may prevent it from starting altogether.

  • B1200: This code indicates a problem with the fuel pump relay circuit. This issue can cause your bike to fail to start or stall while riding.

  • B1210: This code indicates a problem with the fuel level sender circuit. This issue can cause inaccurate fuel level readings and may result in your bike running out of fuel unexpectedly.

  • B1211: This code indicates a problem with the fuel injector 1 circuit. This issue can cause your bike to run poorly or fail to start.

  • B1212: This code indicates a problem with the fuel injector 2 circuit. This issue can cause your bike to run poorly or fail to start.

  • B1213: This code indicates a problem with the fuel injector 3 circuit. This issue can cause your bike to run poorly or fail to start.

In conclusion, understanding Harley diagnostic codes is essential for maintaining your bike’s health and diagnosing any issues that may arise. By decoding DTCs and familiarizing yourself with the most common trouble codes, you’ll be better equipped to keep your Harley running smoothly and safely.

The Role of the Body Control Module (BCM)

The Body Control Module (BCM) is an essential component in Harley Davidson motorcycles. It serves as a central hub for controlling various electrical systems and accessories in the bike. The BCM is responsible for managing the lighting system, turn signals, horn, and other electrical components.

BCM Functions

The BCM is designed to monitor and control the electrical systems in your Harley Davidson. It receives input from various sensors and switches located throughout the bike and sends output signals to the respective components. The BCM is responsible for controlling the lighting system, turn signals, horn, and other electrical components.

BCM and B1320 Relation

B1320 is a common diagnostic trouble code (DTC) associated with the BCM. It indicates that there is a problem with the BCM’s internal memory or programming. This DTC can cause various issues, such as the lighting system not working correctly, turn signals not functioning, or other electrical components not working as intended.

If you encounter the B1320 error code, it is essential to have your BCM inspected by a qualified technician. They will diagnose the issue and determine the best course of action to resolve the problem. In some cases, the BCM may need to be replaced or reprogrammed to fix the issue.

In conclusion, the BCM is a crucial component in your Harley Davidson motorcycle. It is responsible for managing and controlling various electrical systems and accessories in your bike. If you encounter any issues with your bike’s electrical systems, it is essential to have your BCM inspected by a qualified technician to ensure that your bike is safe and functioning correctly.

Ignition System Insights

If you’re experiencing Harley code B1320, it’s important to understand the potential issues with your ignition system. This code indicates that your right-hand control module (RHCM) info button is stuck. Here are some insights into the possible causes of this issue and how to address them.

Ignition Switch Issues

One potential cause of B1320 is a problem with your ignition switch. The ignition switch is responsible for turning on your bike’s electrical system, including the RHCM. If the switch is faulty or damaged, it can cause issues with the RHCM and other components of your ignition system.

To troubleshoot ignition switch issues, you can use a multimeter to check for continuity and resistance in the switch. You should also inspect the wiring and connections to ensure that everything is properly connected and in good condition.

CAN Bus and ISS

Another potential cause of B1320 is an issue with the Controller Area Network (CAN) bus or the Ignition Switch Status (ISS) signal. The CAN bus is a communication network that connects various components of your bike’s electrical system, including the RHCM. The ISS signal is used to indicate the status of your ignition switch.

If there is a problem with the CAN bus or ISS signal, it can cause issues with the RHCM and other components of your ignition system. To troubleshoot these issues, you can use a diagnostic tool to check for fault codes and test the various components of your electrical system.

Overall, if you’re experiencing Harley code B1320, it’s important to address the issue as soon as possible to prevent further damage to your ignition system. By understanding the potential causes of this issue and how to troubleshoot them, you can get your bike back on the road in no time.

Electrical Troubleshooting Strategies

When it comes to diagnosing electrical issues on your Harley-Davidson motorcycle, it’s essential to have a clear strategy in place to avoid wasting time and money. Here are some electrical troubleshooting strategies to help you diagnose and fix the B1320 code:

Voltage Checks

One of the first steps in diagnosing an electrical issue is to check the voltage of the battery. A low voltage can cause various issues, including the B1320 code. Use a voltmeter to check the battery voltage, and if it’s low, try slow charging the battery for 12 hours and re-test. If the battery voltage is good, you can move on to checking the voltage of other components in the system.

Circuit Continuity Tests

Another essential step in diagnosing electrical issues is to check the continuity of the circuits. This helps to determine if there are any breaks or short circuits in the wiring that could be causing the problem. Use a multimeter to check the continuity of the circuits and look for any signs of damage or wear in the wiring. If you find any issues, you may need to replace the wiring or repair the damaged area.

When it comes to the B1320 code, it’s essential to check the RHCM info button for any signs of damage or wear. The code indicates that the info button is stuck, which could be caused by a short circuit in the wiring or a faulty button. Check the continuity of the circuit and look for any signs of damage or wear in the wiring leading to the button. If you don’t find any issues with the wiring, you may need to replace the button itself.

In conclusion, diagnosing electrical issues on your Harley-Davidson motorcycle can be challenging, but with a clear strategy in place, you can save time and money. Remember to check the voltage of the battery and other components in the system and to test the continuity of the circuits. When it comes to the B1320 code, check the RHCM info button for any signs of damage or wear and replace it if necessary.

Specifics of Harley Code B1320

If you own a Harley-Davidson motorcycle, you may have encountered trouble codes that show up on your bike’s dashboard. One such code is B1320, which is related to the driver door ajar circuit. In this section, we will discuss the specifics of Harley Code B1320, including its symptoms and potential fixes.

Symptoms of Code B1320

When B1320 trouble code appears on your Harley’s dashboard, it indicates that there is an issue with the driver door ajar circuit. This means that your bike’s onboard computer system is unable to detect whether the driver door is open or closed. As a result, you may experience the following symptoms:

  • The interior lights of your motorcycle may not turn on or off when you open or close the driver door.
  • The alarm system of your bike may not arm or disarm properly.
  • The ignition switch of your motorcycle may not work as expected.

Potential Fixes for B1320

If you encounter the B1320 trouble code on your Harley, there are several potential fixes that you can try. Here are some of the most common solutions:

  • Check the driver door ajar switch: The first thing you should do is check the driver door ajar switch to see if it is working properly. If it is not, you may need to replace it.
  • Inspect the wiring: The next step is to inspect the wiring of the driver door ajar circuit to see if there are any loose or damaged wires. If you find any, you may need to repair or replace them.
  • Check the BCM: If the above solutions do not work, you may need to check the Body Control Module (BCM) of your motorcycle. The BCM is responsible for monitoring the driver door ajar switch, and if it is not working properly, it may need to be replaced.

In conclusion, Harley Code B1320 is related to the driver door ajar circuit and can cause several symptoms, including issues with the interior lights, alarm system, and ignition switch. If you encounter this trouble code, you can try checking the driver door ajar switch, inspecting the wiring, or checking the BCM to fix the issue.

Advanced Diagnostics and Error Codes

If you are experiencing issues with your Harley-Davidson motorcycle, it is important to diagnose the problem correctly. The onboard diagnostic (OBD) system can help you retrieve trouble codes, which can then be used to identify the root cause of the issue. In this section, we will explore some of the advanced diagnostics and error codes related to Harley-Davidson motorcycles.

LHCM and RHCM Errors

The Left Hand Control Module (LHCM) and Right Hand Control Module (RHCM) are two important components of your Harley-Davidson motorcycle. If you encounter any issues with these modules, you may receive error codes such as LHCM Internal Error or RHCM Internal Error. These error codes indicate that there is a problem with the respective module and it needs to be repaired or replaced.

Fuel System Fault Codes

The fuel system is another critical component of your Harley-Davidson motorcycle. If you experience any issues with the fuel system, you may receive error codes such as Fuel Level Sender Shorted Low/Open, Fuel Level Sender Shorted High, Fuel Signal Low, Fuel Signal High, or B1320. These error codes indicate that there is a problem with the fuel system and it needs to be inspected and repaired.

To diagnose fuel system fault codes, you can use a multimeter to test the fuel level sender and fuel pump. If the fuel level sender is shorted or the fuel pump is malfunctioning, these components may need to be replaced.

In conclusion, it is important to diagnose any issues with your Harley-Davidson motorcycle correctly. The OBD system can help you retrieve trouble codes, which can then be used to identify the root cause of the issue. If you encounter any LHCM or RHCM errors, or fuel system fault codes, it is important to inspect and repair the affected components promptly.

Repair and Maintenance Tips

When to Consult a Professional

If you are not comfortable working with your Harley-Davidson’s electrical system, it’s best to leave the repairs to a professional. A qualified mechanic can diagnose and repair the B1320 trouble code and any other issues that may be present. This will ensure that the work is done correctly and your bike is safe to ride.

DIY Troubleshooting

If you are comfortable working with your Harley-Davidson’s electrical system, you can attempt to troubleshoot the B1320 trouble code yourself. Here are some tips to get you started:

  • Check the ignition switch: The B1320 trouble code can be caused by a faulty ignition switch. Check the switch for any signs of damage or wear. If the switch is damaged, it will need to be replaced.

  • Check the BCM: The B1320 trouble code can also be caused by a malfunctioning Body Control Module (BCM). Check the BCM for any signs of damage or wear. If the BCM is damaged, it will need to be replaced.

  • Clear the trouble code: Once you have identified and fixed the issue causing the B1320 trouble code, you will need to clear the code from your bike’s computer. This can be done using an OBD-II code scanner or by disconnecting the battery for a few minutes.

Remember to always follow the manufacturer’s instructions and safety guidelines when working on your Harley-Davidson. If you are unsure about anything, consult a professional mechanic. With proper maintenance and care, your Harley-Davidson can provide you with years of reliable riding.

Conclusion

In conclusion, the B1320 trouble code is related to the Body Control Module (BCM) of your Harley Davidson motorcycle. This code indicates that the info button on the right-hand control module (RHCM) is stuck. The RHCM is responsible for controlling various functions of your motorcycle such as the turn signals, horn, and cruise control.

If you encounter the B1320 code, it is important to check the wiring harness and connectors related to the RHCM. Look for any damaged components or broken, bent, pushed out, or corroded connector pins. Try to fix any issues that you find.

It is also important to note that the ignition switch can sometimes cause the B1320 code to appear. If you suspect that the ignition switch is the problem, it may be necessary to replace it.

In summary, the B1320 code is related to the RHCM and can be caused by issues with the wiring harness, connectors, or ignition switch. If you encounter this code, it is important to diagnose and fix the problem as soon as possible to ensure the proper functioning of your motorcycle.

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