Harley Davidson Wiring Color Codes – Unlock the Mystery

Wiring color codes for Harley-Davidson motorcycles can be found on the ECM (Electronic Control Module) and the Ignition Module. The ECM is located under the engine compartment’s left side of the dashboard.

Color coding for wiring on the ECM is based on polarity, with orange (positive) wires going to orange connectors and black (negative) wires going to black connectors. If you’re a Harley Davidson owner, you know how important it is to understand the various components of your bike, including its wiring.

Harley-Davidson Wiring Color Codes can be a bit puzzling for most riders. It doesn’t help that they can vary by model year and even location. We’ll cover everything from what Harley Davidson wiring color codes are to how to identify them. We also provide a comprehensive Harley Davidson wiring diagram with color codes to help make things clearer.

Harley Davidson Wiring Color Codes

What Is A Harley Davidson Wiring Color Code?

What Is A Harley Davidson Wiring Color Code

Harley-Davidson wiring color codes play a significant role in ensuring the safe and trouble-free operation of the motorcycle. Each wire color carries a specific meaning and is essential for easy identification during the installation or troubleshooting of electrical wiring.

For example, people generally wire Harley Davidson tail lights with blue wiring. Large A3 size laminated color wiring diagrams are readily available for Harley Davidson motorcycles to understand the wiring configuration quickly.

A helpful table also describes the wiring colors of the brake wires’ light, ground, and rear turn signals. Installing and troubleshooting electrical wiring on a motorcycle can be challenging. Accurately knowing wire color codes ensures safety and avoids potential problems.

Here’s Harley Davidson Wiring Color Codes

Here's Harley Davidson Wiring Color Codes

Harley Davidson uses a color-coding system to identify the wires in their motorcycles’ electrical systems. As a general rule, the ground wire is solid black. The other wires are color-coded to make them easy to identify. Large A3 (12″ x 16″) laminated color wiring diagrams are available for Harley Davidson motorcycles, helping owners identify the wires and troubleshoot electrical issues.

While it’s important to take note of the wire colors, it’s also crucial to note that motorcycle companies often use different color codes for their police wire harness, making it essential to adhere to the manufacturer’s recommended color codes. Wiring colors for Harley-Davidson motorcycles can be confusing but fairly standard. The colors are as follows:

  • Red: Ignition coil (black lead)
  • White: Battery (gray/red lead)
  • Orange: Harness (yellow/white lead)
  • Purple: Brake light switch (blue/white lead)
  • Green: Handlebar switch (green/white lead)
  • Blue: Indicator light switch (blue/orange lead)
  • Black: Headlight switch (black/orange lead)
  • Grey: Turn signal switch (gray/black lead)
  • Brown: Backup light switch (brown/black lead)

How To Identify A Harley Davidson Wiring Color Code?

How To Identify A Harley Davidson Wiring Color Code

Identifying a Harley Davidson wiring color code can be useful for troubleshooting electrical wiring issues or modifying your motorcycle. It is important to note that these color codes may vary depending on the specific model and year of your Harley Davidson Motorcycle Wire Color Codes.

It is always best to consult the appropriate wiring diagram or shop manual for accurate information. Here are some tips to help you identify the different color codes:

  • Black: Ground
  • Brown: Tail lights and running lights
  • Violet: Left turn signal
  • Blue: High beam
  • Yellow: Starter circuit, ignition switch, and accessories
  • White: Accessory power and lighting
  • Green: Right turn signal
  • Red: Brake lights and battery power

Harley Davidson Wiring Diagram – Other Information

Harley Davidson Wiring Diagram – Other Information

Harley Davidson wiring color codes are often confusing for motorcycle enthusiasts, but the process does not have to be overwhelming. The Scosche HDSWC1 Application Manual can help clear up the confusion by offering wire color codes and wiring diagrams for Harley Davidson motorcycles.

Crosschecking the wires and the corresponding lights is important before completing the wiring process. Different motorcycle companies use unique color codes for wires, so it’s best to double-check before installing.

Laminated color wiring diagrams for Harley Davidson motorcycles in A3 size (12″ x 16″) are available for purchase. The diagrams include the corresponding wire colors to make the installation more comfortable. To ensure you are connecting the wires correctly, it is essential to take note of the actual wire colors when referencing the diagrams.

Harley Davidson Wiring Diagram – Reference

A complex wiring system empowers Harley Davidson motorcycles. Therefore, it’s crucial to have access to wiring diagrams that indicate wire color codes for all the different functions. The Scosche HDSWC1 Application Manual is an excellent reference that provides detailed wire color codes and wiring diagrams for Harley Davidson motorcycles.

For those who prefer a more visual reference, there are A3 laminated color wiring diagrams available for Harley Davidson motorcycles that can be very useful. Each motorcycle brand has its unique wire color codes for different functions. Thus, disconnecting all wires from the battery and connecting them one by one to the battery makes it easier to identify their colors.

If you’re working on your Harley Davidson motorcycle, taking note of wiring colors can help you understand and use the wiring diagram effectively. It eliminates guessing games, thus making your work smooth and effective. Hence, it’s vital to have access to comprehensive wiring diagrams, color codes, and reference materials for Harley Davidson motorcycle projects.

How To Determine Harley Tail Light Wire Colors

How To Determine Harley Tail Light Wire Colors

Harley Davidson is a popular motorcycle brand with a unique wiring system. There is a range of wiring coded with different color schemes. You can follow these simple steps to determine the correct wire colors for the tail light on a Harley Davidson.

Look for the ground wire, which is common to all lamps and may be black or black with a yellow stripe, orange, or green individual wires. The tail light positive wire is always a solid blue color, and you can identify it by the wire connected to the license plate. The remaining wire color is the brake light positive wire, and the other color in each turn signal is the positive turn signal wire.

Secure Your Bike

Securing your bike in a stable and well-lit location is important before determining the wire colors of your Harley’s tail light. Securing your bike is crucial to prevent theft and ensure safety. Always lock your bike with high-quality locks, park it in well-lit areas, and use additional security measures such as alarms or immobilizers.

Observe The Wire Colors

Determining the tail light wire colors on your Harley can be a mystery, but it’s a task that can be easily accomplished by observing the wire colors. Recognize the primary color of the tail light positive wire on your Harley. Look at the wire connected to the license plate to find the tail light positive wire. Typically, Harley’s tail light positive wire is a solid blue color.

Figure Out The Color Of The Ground Wire

When determining the wire colors of a Harley tail light, it is important first to identify the ground wire. Typically, the ground wire will be solid black and the only wire common to all lamps. Once you have identified the ground wire, you can determine the color of the other wires by looking for the one wire that is not the ground wire.

Type of Harley Davidson Wire

Type of Harley Davidson Wire

Harley Davidson offers a wide range of wire types for their motorcycles. These wires are designed to meet the specific needs and requirements of Harley Davidson riders. Some of the popular wire types available include ignition wires, spark plug wires, throttle control wires, clutch cables, brake cables, and wiring harnesses. Each wire type is crafted with high-quality materials to ensure durability and reliable performance. Here are some type of Harley Davidson wire: 

  • blue wire
  • brown wire
  • Orange wires
  • factory wires
  • power wires
  • blue color wires
  • color-coded wires
  • Brake/Turn Signal Wire
  • insulated copper wire


Harley-Davidson is one of the most iconic American brands, and its motorcycles are popular for their distinct look and performance. One key factor that sets Harley-Davidson apart from other manufacturers is its use of high-quality materials and craftsmanship.

Its bikes are built to last and represent a commitment to quality. Color coding is handy for identifying different parts of a motorcycle and distinguishing them from one another. This helps technicians locate parts when servicing or repairing a bike in case of a malfunction or breakdown.

Understanding Harley-Davidson wiring color codes is essential to properly maintaining and repairing your motorcycle. You must know what each color represents and how to identify them to read wiring diagrams and troubleshoot electrical problems. Unlock the Harley Davidson wiring color codes mystery with our comprehensive reference guide.

Frequently Asked Questions

Why Is Code Color Coded?

Code is color-coded to improve readability and understanding for programmers. Different colors are used to distinguish between different elements of the code, such as syntax, variables, keywords, and comments.

What Color Is Common Wire?

Common wire is typically color-coded in electrical systems. In most cases, the common wire is colored black or red. This helps to distinguish it from other wires and makes it easier to identify during installation or troubleshooting.

Is Color Coding Necessary?

Color coding is unnecessary, but it can be a helpful tool for organization and visual differentiation. It can make information easier to understand and interpret, especially in complex systems or large datasets.

How Do You Color Code Cables?

Cables can be color-coded by using different colored cable ties or markers. Each color can represent a specific type of cable or a particular function. This can help organize and easily identify cables, especially in complex setups or large networks.

Where Can I Find My Harley Paint Code?

You can find the paint code for your Harley by checking the manufacturer’s label on the frame near the engine. It is usually a three- or four-digit alphanumeric code corresponding to your motorcycle’s specific color.

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