This is a 1-to-4 e-bike extension harness used to connect multiple handlebar components—typically throttle, brake cutoffs, and display—to a compatible e-bike controller. It functions as a junction cable, reducing clutter and simplifying wiring on electric bicycle builds and repairs.
It’s most commonly used on KT-style and similar controller systems that rely on a shared accessory port rather than individual controller connections.
Key Features
• 1-to-4 integration harness for e-bike controllers
• Designed to connect brake cutoff(s), throttle, and display
• Color-coded wiring for signal identification
• Composite cable construction for flexibility and durability
• Waterproof-style connectors commonly used on e-bike systems
Compatibility & Use Notes
• Often used with KT-style and similar e-bike controllers
• Standard wire length: approximately 110cm (1000mm + 100mm)
• Typical color coding:
– Yellow: throttle signal
– Green: display / meter signal
– Red: brake cutoff signal
• Connector types and pin layouts are not fully standardized
• Not universal—connector shape, pin count, and orientation must match your controller and components
Service / Ownership Context
E-bike wiring harnesses vary by generation and manufacturer. Before installation, connectors should be visually matched and verified against the existing controller and components. Do not force connectors—misalignment can damage pins or controller ports. Proper cable routing helps prevent strain, water intrusion, and intermittent electrical faults.
Fit & Use Signals
• Good fit if your e-bike uses a compatible 1T4 controller harness system
• Good fit for replacing a damaged or missing accessory cable
• Good fit for clean, centralized handlebar wiring
• Not a fit for controllers with proprietary or non-matching connectors
• Not a fit if pin count or connector style differs from your system
