Triumph LC Rear Light & Indicator Wiring Adapter + AUX – Plug & Play

Plug & Play Rear Wiring Adapter for Triumph LC Models

This Bonvent wiring adapter is designed to upgrade the rear lighting setup on Triumph liquid-cooled Modern Classics without cutting, splicing or modifying the original wiring loom.

It allows you to connect any aftermarket tail light, brake light, license plate light, two rear turn signals and an auxiliary 12V output while keeping the original Triumph connectors untouched.

The adapter uses thick, high-quality sleeving for a clean and durable finish. It is ideal for tail tidy installations, custom rear light conversions and compact rear indicator setups.

An inline diode is integrated into the Bonvent wiring adapter loom to help prevent ECU warning lights when fitting non-Triumph rear lights.

Compatibility

This wiring adapter is compatible with the following Triumph liquid-cooled Modern Classic models.

Euro 4 and Euro 5 compatible models:

• Triumph Street Twin
• Triumph Street Cup
• Triumph Bonneville T100
• Triumph Bonneville T120
• Triumph Thruxton R
• Triumph Thruxton S
• Triumph Street Scrambler

Euro 4 only:

• Triumph Speed Twin 1200, 2019–2020

Key features

• Plug & play installation: connects directly to the original Triumph rear wiring connectors.
• No cutting or splicing: the original wiring harness stays untouched.
• Integrated inline diode: helps prevent ECU warning lights when fitting non-Triumph rear lights.
• Rear light and indicator output: tail light, brake light, license plate light and two rear indicators.
• AUX 12V output: additional auxiliary power output for extra lighting accessories.
• Thick high-quality sleeving: clean, durable and premium finish.
• Reversible modification: easy to remove if you want to return the motorcycle to its original configuration.

Wiring color code

• TL — Tail light + license plate light
  • Red: brake light — double bullet 3.5 mm connector
  • Green: tail light + license plate light — double bullet 3.5 mm connector
  • Black: ground — double bullet 3.5 mm connector
• TS-L — Left turn signal
  • Blue: left-hand side signal — bullet 3.5 mm connector
  • Black: ground — bullet 3.5 mm connector
• TS-R — Right turn signal
  • Orange: right-hand side signal — bullet 3.5 mm connector
  • Black: ground — bullet 3.5 mm connector
• AUX — 12V auxiliary power
  • Yellow: 12V auxiliary power — bullet 3.5 mm connector
  • Black: ground — bullet 3.5 mm connector

Specifications

• Length: 49 cm
• Harness type: rear light, brake light, license plate light, AUX and two rear indicators
• Connector type: bullet 3.5 mm outputs
• Installation: plug & play
• Modification required: no cutting, no splicing, no soldering
• Sleeving: thick high-quality protective sleeving
• Integrated component: inline diode to help prevent ECU warning lights

Not compatible with:

• Triumph Bobber
• Triumph Speedmaster
• Triumph Speed Twin Euro 5 models

If you are unsure about your motorcycle year or rear wiring configuration, please check compatibility before ordering.

Plug & Play Solution for Effortless Upgrades

Looking to upgrade your tail light and turn signals without altering your bike's original wiring? Cutting the original wires is a bad idea—it can void your bike’s warranty and may lead to complications if you plan to resell it. Damaged or cut wires can make future buyers hesitant, and your bike may lose its road safety approval. That's why we’ve designed this adapter to keep any modifications related to the rear turn signals and tail light completely reversible, maintaining the safety and value of your bike.

Crafted with precision by our skilled artisans, this Plug & Play harness requires no splicing, extending, or complicated wiring modifications. The installation takes less than 2 minutes—simply replace the original wiring with our adapter, and you're good to go.

-AN INLINE DIODE IS INTEGRATED INTO THE BONVENT WIRING ADAPTER LOOM TO PREVENT ECU WARING LIGHTS WHEN FITTING NON-TRIUMPH LIGHTS

Key Features:

• Plug & Play Installation
  No need for complicated wiring adjustments—simply connect our adapter to your bike for quick and easy installation.
  
  
• Inline diode integrated

To prevent ECU warning lights when fitting non-triumph lighs

• Full Harness for Rear Light and Turn Signals
  This adapter provides connections for the rear light, brake light, 2 turn signals + AUX
  
  
• Reversible Modification
  Perfect for those who want to maintain the ability to easily revert their bike to its stock condition when reselling.
  
  
• Compatible with Aftermarket Parts
  Allows you to connect any aftermarket rear light or turn signals without affecting the original wiring.
  
  

Specifications:

• Length: 49 cm
• Harness Type: Rear Light, Brake Light, Auxiliary, and 2 Turn Signals
• Auxiliary Connector: Includes an auxiliary connector for additional lighting

Why Choose This Adapter?

• Reversible and Non-Invasive
  This adapter ensures that your bike's original wiring stays untouched, providing a reversible solution for easy customization.
  
  
• Perfect for Custom Builds
  Whether you're mounting under the tail or switching out lights, this adapter makes it effortless to enhance the look of your Royal Enfield.
  
  

Compatibility:

This Wiring Adapter is compatible with all the Liquid Cooled Triumph Twins- ALL TWINS FROM 2016 TILL NOW

• Euro 4 and Euro 5:

-Street Twin

-Street Cup

-T100

-T120

-Thruxton R

-Thruxton S

-Street Scrambler

-Euro 4 Speed Twin (2019-2020)

-Does not fit on Bobber and speedmaster and euro 5 speed win (2022 till now)

 

 

This adapter ensures seamless installation for aftermarket rear lights and turn signals across these models, keeping the bike's original wiring intact.