Custom Dynamics Running Light Load Harness for 2025 Harley Softail

Product Description

Custom Dynamics Running Light Load Harness - 2025 Softail

Need this if you're putting an LED headlight on a 2025 Softail. The bike's computer expects to see the old headlight's running light load, and without this harness you'll get error codes. This little harness replicates the factory load so your bike thinks everything's stock. Works with Shark Demon or ProBEAM LED headlights. Only needed for 2025 models—2026 bikes don't need it.

Fitment

• 2025 Softail Street Bob (FXBB)
• 2025 Softail Low Rider ST (FXLRST)
• 2025 Softail Low Rider S (FXLRS)
• 2025 Softail Heritage Classic (FLHC)
• 2025 Softail Fat Boy (FLFB)
• 2025 Softail Breakout (FXBR)
• Only required for 2025 models—2026 bikes don't need this

Features & Benefits

• Prevents Error Codes - Stops BCM codes when upgrading to LED headlights
• Replicates Factory Load - Makes the bike's computer think your stock headlight is still there
• Plug-and-Play - Simple installation, no cutting or splicing
• Works with LED Headlights - Pairs perfectly with Shark Demon or ProBEAM headlights
• Keeps Factory Lighting - Turn signals and taillight work like they should
• Lifetime Warranty - Built to last

Why Upgrade?

The 2025 Softail's computer monitors the headlight load, so when you swap in an LED headlight, the bike freaks out and throws error codes. This harness fixes that by making the computer think your old headlight is still connected. It replicates the factory running light load so everything works like it should—no errors, no problems. Just plug it in when you install your Shark Demon or ProBEAM LED headlight (sold separately), and you're good to go. Your turn signals and taillight stay factory, and the bike's brain stays happy. Note: Only needed for 2025 Softails. The 2026 models don't need this harness.

Note: Part CD-25ST-RUNHARN, Drag 2120-1452. Prevents BCM codes on 2025 Softail models when upgrading to LED headlights. Replicates factory headlight halo running light load. Plug-and-play installation. Works with Shark Demon or ProBEAM LED headlights (sold separately). Maintains factory turn signals and taillight. Fits 2025 Street Bob, Low Rider ST, Low Rider S, Heritage Classic, Fat Boy, Breakout. Only required for 2025 models—not needed for 2026. Lifetime warranty.