Electrical systems are the nervous system of your Harley Davidson. From headlights to ignition, every critical function depends on the right fuses and relays. But with different models and years using various fuse ratings and relay types, it can be confusing to find the correct setup.
That’s why we’ve created this Harley Davidson Fuses & Relays Chart — a complete guide to help you identify the proper fuses and relays for your bike.
Why Do You Need a Harley Davidson Fuse & Relay Chart?
Motorcycle electrical systems can be tricky. Installing the wrong fuse size can cause repeated blowouts, and skipping a faulty relay can leave you stranded.
Here’s why a fuse & relay chart is essential:
- Prevents electrical damage – Correct fuse ratings protect your wiring harness.
- Keeps systems working properly – Relays control key functions like starter, ignition, and lights.
- Saves money on repairs – Avoids burnt wiring or short circuits.
- Quick troubleshooting – Makes it easier to diagnose electrical issues.
Whether you’re doing routine maintenance or troubleshooting a problem, this chart gives you the specs you need.
Harley Davidson Fuse & Relay Chart (By Model)
⚡ Tip: Fuse ratings are in amps (A). Always replace with the same rating specified for your bike.
Touring Models Fuse & Relay Chart
| Model Name | Production Year | Main Fuse (A) | Starter Relay | Other Relays | Notes |
|---|---|---|---|---|---|
| Touring FLHT / FLHR / FLTR | 2000–2007 | 30A | Starter Relay 31506-00 | System Relay, Accessory Relay | Standard setup |
| Touring Models | 2008–2013 | 40A | Starter Relay 31506-00B | System Relay, Fuel Pump Relay | Higher main fuse |
| Touring Models | 2014–2020 | 50A | Starter Relay 31506-08 | BCM-controlled Relays | Includes lighting relay |
| Touring Models | 2021–2024 | 50A | Starter Relay 31506-08B | BCM-integrated Relays | Smart electrical system |
Softail Models Fuse & Relay Chart
| Model Name | Production Year | Main Fuse (A) | Starter Relay | Other Relays | Notes |
|---|---|---|---|---|---|
| Softail (FXST / FLST) | 2000–2006 | 30A | Starter Relay 31506-00 | System Relay | Standard |
| Softail Models | 2007–2017 | 40A | Starter Relay 31506-06 | Ignition Relay, Lighting Relay | EFI models |
| Softail (Milwaukee-Eight) | 2018–2024 | 50A | Starter Relay 31506-08 | BCM-integrated Relays | Modernized system |
Dyna Models Fuse & Relay Chart
| Model Name | Production Year | Main Fuse (A) | Starter Relay | Other Relays | Notes |
|---|---|---|---|---|---|
| Dyna FXD / FXDWG | 2000–2006 | 30A | Starter Relay 31506-00 | Ignition Relay | Standard |
| All Dyna Models | 2007–2017 | 40A | Starter Relay 31506-06 | System Relay, Lighting Relay | Last generation Dyna |
Sportster Models Fuse & Relay Chart
| Model Name | Production Year | Main Fuse (A) | Starter Relay | Other Relays | Notes |
|---|---|---|---|---|---|
| Sportster 883 / 1200 | 1999–2003 | 30A | Starter Relay 31506-99 | Ignition Relay | Carb models |
| Sportster Models | 2004–2013 | 30A | Starter Relay 31506-04 | System Relay, Accessory Relay | EFI introduced |
| Sportster Models | 2014–2020 | 40A | Starter Relay 31506-08 | BCM-integrated Relays | Modern wiring |
V-Rod Models Fuse & Relay Chart
| Model Name | Production Year | Main Fuse (A) | Starter Relay | Other Relays | Notes |
|---|---|---|---|---|---|
| V-Rod VRSC | 2002–2006 | 30A | Starter Relay 31506-00 | System Relay | Stock setup |
| V-Rod Muscle / Night Rod | 2007–2017 | 40A | Starter Relay 31506-06 | Fuel Pump Relay, Lighting Relay | High-performance wiring |
Street Models Fuse & Relay Chart
| Model Name | Production Year | Main Fuse (A) | Starter Relay | Other Relays | Notes |
|---|---|---|---|---|---|
| Street 500 (XG500) | 2015–2020 | 30A | Starter Relay 31506-06 | Lighting Relay | Compact system |
| Street 750 (XG750, XG750A) | 2015–2020 | 30A | Starter Relay 31506-06 | Fuel Pump Relay, System Relay | Urban performance |
Things You Should Know About Harley Fuses & Relays
- Fuse Blowing Often? – This means an underlying wiring issue, not just a bad fuse.
- Relays Can Stick – If your bike won’t start or lights stay on, check relays.
- Carry Spares: Keep extra fuses and one starter relay in your saddlebags.
- BCM Systems: Newer Harleys use a Body Control Module, which integrates relay functions into electronics.
How to Replace a Fuse or Relay on a Harley Davidson
- Turn off ignition – Prevents shorts or sparks.
- Locate fuse box – Usually under the seat or side cover.
- Identify blown fuse – Look for a broken filament inside.
- Replace with same rating – Never install a higher-amp fuse.
- Check relays – Swap with a known working relay for troubleshooting.
- Test system – Turn ignition on and verify electrical function.
Final Thoughts
The Harley Davidson Fuse & Relay Chart is an essential tool for troubleshooting and maintenance. Correct fuses prevent electrical fires, while reliable relays keep your starter, lights, and ignition working properly.
Whether you ride a Touring, Softail, Sportster, Dyna, V-Rod, or Street, this guide ensures you’ll always have the right electrical setup for safe riding.
Tonmoy is a recognized author and editor known for his deep passion and expertise in the world of motorcycles. His work goes beyond the mechanics and aesthetics, capturing the vibrant culture of motorcycle clubs and the strong sense of brotherhood shared by riders. Tonmoy’s special enthusiasm for motorcycle clubs adds depth to his writing, making his contributions to the motorcycle community both insightful and impactful
