DENALI H4 Headlight Wiring Adapter to H9/H11 for HARLEY DAVIDSON ROAD KING SPECIAL 2025

DENALI offers this wiring harness / adapter for HARLEY DAVIDSON ROAD KING SPECIAL 2025. To work, an electrical accessory must be connected to the battery and controlled by a switch, without overloading the original wires.

Why use a dedicated harness?

The benefits:

• The original circuit is not overloaded: the current goes through a relay and a fuse.
• Plug & Play connection to the original sockets: nothing to cut, and you can go back to standard.
• Depending on the model, waterproof connectors that withstand rain, mud and washing.

Why choose DENALI?

DENALI is an American brand of auxiliary lighting and horns, created by the team behind Twisted Throttle, the adventure-bike accessories specialist. It designs complete systems (lights, model-specific mounts, wiring harnesses, controllers) whose optics are developed to meet US DOT/SAE standards and European E-mark approval.

When should you replace this part?

A split sheath, green corrosion in a connector, a fuse that keeps blowing or an accessory that works on and off: the harness or adapter needs replacing.

Specifications and fitting tips

• Plug & play adapter
• Converts H9/H11 connectors into female H4 plug
• Manufacturer part number: DNL.WHS.10400

Cross-Mania tip: Disconnect the battery before fitting, route the cables away from hot parts and moving areas (steering, suspension), then secure them with cable ties.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
HARLEY DAVIDSON ROAD KING SPECIAL 2025