When dealing with Harley Davidson motorcycles, it’s not uncommon to encounter various diagnostic trouble codes that can help pinpoint issues and aid in maintenance. One such code that we often come across is P0572 Harley code – a brake switch low error. This specific code indicates a malfunction within the cruise control/brake switch “A” circuit, typically caused by a detected low voltage condition.
As Harley enthusiasts, we understand the importance of proper brake function and aim to resolve any issues that may arise. In many cases, the cause of the P0572 code is related to the rear brake switch. By conducting diagnostic tests and examining the electrical connections, we can efficiently troubleshoot the problem and restore the brake light functionality.
Throughout our experience, we know that deciphering these codes and addressing the underlying issues is essential to keep our motorcycles in peak condition. With numerous resources available, we can easily tap into a wealth of knowledge to help us maintain and repair our beloved Harleys.
P0572 Harley Code Definition
The P0572 Harley code is a diagnostic trouble code that signifies an issue with the brake switch circuit. When our vehicle’s engine control module (ECM) detects a low voltage condition in the cruise control/brake switch “A” circuit, this code is triggered. It is crucial to address and rectify this issue as it may impact our brake lights’ functionality and cruise control deactivation.
Various factors can lead to the P0572 code, such as a faulty brake switch, damaged or corroded wiring or connectors, and misaligned brake switch components. Identifying the root cause aids us in taking the necessary corrective action to fix the problem and prevent potential safety hazards.
When dealing with the P0572 Harley code, the following steps can be taken:
- Inspect the brake switch for proper functioning
- Examine the wiring and connectors for any damage or corrosion
- Check for proper alignment of the brake switch components
- Replace the brake switch if necessary
It is essential to remember that the P0572 Harley code may also affect the rear brake lights, which can compromise road safety. Hence, addressing this issue in a timely manner is vital for maintaining the smooth operation and performance of our Harley Davidson motorcycle.
Common Causes of P0572 Harley Code
When diagnosing the P0572 Harley code, it’s essential to understand the potential causes behind this specific error code. As we’ve researched and gathered information from reliable sources, we’ve identified several common issues that could trigger the P0572 code.
One prevalent cause we’ve discovered is a damaged or malfunctioning cruise control or brake switch. This issue can arise if the brake light switch isn’t adjusted correctly, inhibiting the proper function of the system.
Furthermore, wiring issues can also lead to the P0572 Harley code. These issues may include pinched wires at the brake pedal, chafed wires, or other damage to the wire harness. It’s essential to inspect the wiring for any visible signs of wear or damage.
Another possible culprit is the Engine Control Module (ECM). If there are internal faults within the ECM, such as shorts or opens, it can result in the P0572 code being triggered. To identify an ECM issue, additional testing and inspection may be required.
Mechanical hindrances can also contribute to the P0572 Harley code, such as debris or dirt obstructing the brake switch operation. In these cases, it’s essential to clean and assess the brake switch to ensure it’s functioning correctly.
Lastly, improper brake switch adjustment or mounting can lead to the P0572 code. It is crucial to verify that the brake switch is both correctly adjusted and securely mounted to prevent any potential issues.
Symptoms of P0572 Harley Code
We have noticed several symptoms that may appear when a P0572 code is present in a Harley Davidson motorcycle. These symptoms can vary in severity and are crucial to diagnosing the issue. Some people might experience only one symptom, while others may have multiple signs indicating a problem. Below are some of the most common symptoms one may encounter:
- Cruise control no longer functioning – This is the most prevalent symptom of a P0572 code in Harley Davidson motorcycles. The cruise control may completely stop functioning, affecting the riding experience.
- Erratic cruise control response – In some cases, the cruise control response may become inconsistent, making it difficult to maintain a steady speed while riding.
- Difficulty engaging cruise control – Along with an erratic response, some riders may face the problem of the cruise control system being turned on but not engaging.
- Rear brake light not switching on – Another possible symptom is the rear brake light not activating when the brakes are applied. This can be a significant safety concern, as other road users may not be aware that the rider is slowing down or stopping.
- Check Engine light illuminated – Lastly, the Check Engine light may be on, indicating a problem with the motorcycle’s engine or other systems.
It’s essential to address these symptoms promptly to fix the underlying issue and prevent potential safety hazards. A thorough diagnosis is necessary to identify the exact cause of the P0572 code in a Harley Davidson motorcycle.
Diagnosing the P0572 Harley Code
When encountering a P0572 Harley code, proper diagnosis is critical to identifying the root cause and resolving the issue. In this section, we will walk through the diagnosis process, which includes the following sub-sections:
Before diving into a more detailed diagnosis, we always recommend starting with a preliminary inspection. This can help identify the most common issues that might trigger the P0572 Harley code:
- Checking the brake lights to ensure they are functioning as expected
- Verifying that the cruise control system operates correctly
- Examining the brake switch and its location for any visible damage or misalignment
If no issues are found during this preliminary inspection, it’s time to move on to more in-depth tests.
Testing the Brake Switch
One possible cause for the P0572 Harley code could be a faulty brake switch. To test the brake switch, we can perform the following steps:
- Locate the brake switch, typically found near the brake pedal on the Harley motorcycle
- Disconnect the brake switch wiring harness
- Using a multimeter, test the brake switch for continuity and resistance
- If the switch does not show proper readings, it may need to be replaced
Inspecting Wiring and Connectors
If the brake switch is functioning correctly, the next step is to inspect the wiring and connectors associated with the brake switch and cruise control system. During this inspection, we need to:
- Examine all related wiring for signs of wear, damage, or corrosion
- Check for any loose or disconnected connectors
- Test the wiring and connectors for proper voltage and continuity using a multimeter
- Repair or replace any damaged components as necessary
Following these steps in diagnosing the P0572 code should help identify the underlying issue and guide us toward a suitable solution.
How to Fix the P0572 Harley Code
When addressing the P0572 Harley code, there are a few steps to follow. Keep in mind that these steps are most effective when performed by a qualified professional, as fixing this issue may require specialized tools and technical knowledge.
First, we’ll want to inspect the brake light switch and ensure it’s adjusted correctly. Misalignment of the brake light switch can cause the P0572 code to appear. If the switch is damaged, it should be replaced.
Next, we’ll examine the wiring and connectors around the brake light switch. Look for corroded, bent, or broken connector pins, which can create opens or shorts in the brake light circuit. Repair or replace any damaged components as necessary.
For Harley models equipped with a Run/Stop/Turn module, we’ll want to check for any issues related to its function. Since the module is part of the brake light system, malfunctions within the module can trigger the P0572 code.
Lastly, we’ll inspect the brake light system as a whole, paying special attention to the following:
- Loose, frayed, or exposed wires
- Broken components, such as the front brake light switch
- Issues with the cruise control
Addressing these potential issues in the correct order should help resolve the P0572 code in your Harley. Remember, if you are unsure or uncomfortable performing any of these steps, it is best to consult a professional mechanic.
Potential Consequences of Ignoring the P0572 Harley Code
When we ignore the P0572 Harley code, we are putting ourselves and others at risk on the road. This code indicates a problem with the brake switch, which has several important functions in our motorcycle, such as activating the brake lights and deactivating cruise control when necessary. Ignoring this issue may have serious consequences, such as:
- Safety risks: Without proper brake light function, other drivers will not be aware when we are slowing down or stopping. This can lead to dangerous situations and potential accidents, particularly during nighttime or low-visibility conditions.
- Malfunctioning cruise control: If the P0572 code affects the cruise control system, it may fail to disengage when we apply the brakes. This can cause difficulty in controlling our vehicle’s speed and increase the risk of collisions.
- Issues with the shift interlock: Brake switches are also involved in the operation of the shift interlock system. If the system malfunctions due to the P0572 code, we might experience difficulty in shifting gears, affecting our ability to control the motorcycle effectively.
- Potential legal issues: Depending on local regulations, operating a vehicle with faulty brake lights may result in fines or penalties for safety violations. In case of an accident, we could also face legal repercussions for riding a motorcycle with known safety issues.
It’s crucial that we address the P0572 code and resolve any underlying issues as soon as possible. Ensuring the proper functioning of our brake switch can prevent accidents, enhance safety, and keep us in compliance with local regulations. Plus, it helps us maintain the overall performance and longevity of our Harley-Davidson motorcycles.
Final Verdict On The P0572 Harley Code
After thoroughly examining the issue of the P0572 Harley code in Harley Davidson motorcycles, we have identified some key insights. The P0572 code is defined as “Cruise Control / Brake Switch ‘A’ Circuit Low” and it indicates a malfunction in the cruise control or brake switch. This error can lead to the rear brake lights not functioning properly, which is a significant safety hazard.
In many cases, the root cause of the P0572 code is a defective cruise control or brake switch. However, other potential causes include wiring issues (e.g., pinched on brake pedal, chafed, etc.), ECM (engine control module) problems, debris or dirt mechanically hindering brake switch operation, improper brake switch adjustment, or a dislodged brake switch.
While diagnosing and fixing the P0572 code issue might seem daunting, we believe that with the right tools and knowledge, Harley Davidson owners can address this problem effectively. It is essential to follow the proper diagnostic procedures, assess the possible causes, and seek professional assistance if needed. By taking these steps, we can ensure the safety and optimal performance of our beloved motorcycles.