Wire Harness Solutions for Every Aftermarket System. - Zhejiangtongsheng Elektronik Co., Ltd

WELCOME TO TSCN

Welcome to TSCN – Your One-Stop Source for Wiring Harnesses for Aftermarket Car Interface Systems.

Discover high-quality, plug-and-play wiring harnesses designed for seamless integration with aftermarket car stereos, navigation units, and interface modules.

PRODUCTS LINEUP

Modern vehicles are equipped with an ever-growing number of electronic components, performing far beyond the basic functions of driving, turning, and stopping. To power and control these systems, automotive wiring harnesses play an essential role—acting as the vehicle's nervous and circulatory system. A wire harness consists of bundled wires protected and structured by Terminals, connectors, clamps, and sheaths. It is responsible for transmitting power and signals across the vehicle with stability and precision.

At TSCN, we specialize in wiring harnesses for aftermarket car interface systems, offering tailored solutions for efficient and non-invasive integration of audio, navigation, and control systems. Our product range includes:

T-Harness Series

These harnesses enable plug-and-play connectivity between factory wiring and aftermarket head units, preserving the integrity of the vehicle's original systems. Popular models like the 22-pin and 26-pin T-Harnesses are ideal for audio upgrades and steering wheel control modules, ensuring fast installation and system compatibility.

AUX / USB Adapter Harnesses

Designed to enhance multimedia accessibility, these harnesses allow smooth integration of external devices via USB or AUX input. Our best-selling models—such as Mazda AUX USB Adapters and Mini USB + Audio combo harnesses—support data transmission and audio playback with OEM-level fit and finish.

Antenna Adapter Harnesses

Essential for radio and infotainment system replacements, antenna adapter harnesses bridge compatibility between aftermarket head units and factory antennas. With options like Fakra connector types and Toyota-specific versions, these harnesses ensure strong, clear signal reception and minimal interference.

Seamless Adapter Harnesses

These harnesses are engineered for non-destructive installations. Perfect for adding smart modules, CAN signal extraction, or remote starters, products like the 16-pin seamless adapter ensure full functionality while maintaining the vehicle's original wiring untouched—ideal for high-end retrofits and system expansions.

By delivering reliability, compatibility, and ease of installation, our wire harness solutions help automotive professionals and DIY users alike build smarter, safer, and more connected vehicles.

Product Series	Product Example	Application Scenario	Connector Type
T-Harness	22-pin Black T-Harness	For installing aftermarket head units without cutting OEM wiring	22-pin male/female
	26-pin Color T-Harness	Used to connect new multimedia units while retaining factory steering controls	26-pin (black/green/blue/white)
	16-pin Gray-Green T-Harness	Enables steering wheel button integration with upgraded head units	16-pin male/female
AUX / USB Adapter	Mazda AUX USB Adapter	Adds AUX/USB input for music streaming and device charging in older models	USB-A + 3.5mm AUX
	Mini USB + Audio Combo	Allows direct connection of mobile devices to upgraded infotainment systems	Mini USB + 3.5mm AUX
	Universal AUX with Fakra Connector	Provides audio input support for non-factory stereo systems	Fakra + 3.5mm AUX
Antenna Adapter	White Fakra Antenna Adapter	Adapts OEM antenna to aftermarket stereo for uninterrupted FM/AM reception	Fakra to ISO/DIN
	Toyota Antenna Adapter with USB	Allows aftermarket radio to receive signal from Toyota's original antenna	Toyota-specific plug + USB
	Universal Antenna Adapter Cable	Ensures antenna compatibility across various car models and aftermarket units	Multi-type plugs + optional USB
Seamless Adapter	16-pin Seamless Adapter (1-929463-1)	Used in advanced upgrades like CAN data reading or smart module integration	OEM-style 16-pin
	Seamless AUX + USB Harness	Adds AUX/USB functionality without modifying factory wiring during infotainment upgrade	Dual-output: AUX + USB
	Multi-function No-cut Adapter Harness	Supports integration of DVR, GPS, or remote start systems without affecting OEM lines	Multi-pin OEM-style interface

Why Choose Us

Full Range Of Customized Services

We provide customers with personalized customized audio connectors and wiring harness solutions to ensure that each product can perfectly fit your high-performance car audio system. Whether it is special specifications or unique needs, we can meet and provide precise customization services.

Strict Quality Control System

From raw material screening to the entire production process, we implement strict quality management to ensure that each product is fully tested before leaving the factory and meets the industry's high standards. This fine quality control allows you to experience long-lasting and stable audio performance without worries.

Manufacturing And Innovation

With a production background of 20 years of experience and a production base of 10,000 square meters, we are not only able to mass produce, but also develop special molds according to customer needs to provide professional support for your special projects.

Application

1. T-Harness

T-Harnesses are ideal for scenarios where users upgrade their factory radio to an aftermarket Android touchscreen, Apple CarPlay unit, or navigation display. These harnesses allow direct plug-and-play connection with the vehicle's original wiring—no cutting, no splicing—while preserving OEM features like steering wheel control, reverse camera input, or door signal alerts. It's the preferred solution for car audio shops, multimedia upgrade centers, and professional installers.

2. AUX / USB Adapter Harness

These harnesses are perfect for vehicles that lack modern audio input ports. Users can easily add 3.5mm AUX or USB input for music streaming, device charging, or smartphone integration. It's especially useful for budget-friendly entertainment upgrades where the main head unit remains unchanged. Ideal for DIY users, ride-share vehicle owners, or older-model upgrades.

3. T-Harness

Antenna adapters are essential when replacing the factory radio and the new unit has a different antenna port. These harnesses ensure uninterrupted access to FM/AM broadcasts, traffic updates, and local stations. They are widely used in aftermarket stereo replacements where radio reception continuity is a must—especially for daily commuters and fleet users who rely on radio for information.

4. Seamless Adapter Harness

Seamless adapter harnesses are best used in advanced retrofit projects where components such as remote starters, GPS trackers, CAN control boxes, or DVR systems are added. These harnesses allow precise access to power, ignition, and data lines using OEM-style connectors, enabling non-invasive installation. Perfect for high-end vehicle customization, fleet upgrades, or warranty-sensitive installations.

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