STEDI ST-31-DT4-004 4x Connector DT-4 Plug & Play SMART Harness High Beam Driving Light Wiring

STEDI ST-31-DT4-004 4x Connector DT-4 Plug & Play SMART Harness High Beam Driving Light Wiring | Professional Grade System

Advanced 4-output plug and play SMART harness with dual 80A relays, 10AWG heavy-duty cabling, automatic polarity detection, and built-in DRL functionality for high-powered lighting installations

Product Overview

The STEDI ST-31-DT4-004 represents the pinnacle of professional-grade driving light wiring solutions, engineered specifically for high current applications requiring dual relay operation and multiple light configurations. This advanced SMART Harness features intelligent automatic polarity detection technology that eliminates installation complexity by working seamlessly with both positive and negative switching systems across a wide range of vehicles, including traditionally difficult models like Toyota, Ford Ranger, and Mazda BT50.

Built with heavy-duty 10AWG conductors and featuring dual 80A relays with 75A total harness capacity, this system is designed to handle the most demanding high-powered lighting setups while maintaining safety and reliability. The four 4-pin DT4 Deutsch connectors are rated at 20A each and include built-in Daytime Running Light (DRL) functionality, making this harness compatible with the latest generation of advanced driving lights that offer multiple operating modes.

Key Specifications

• Model: ST-31-DT4-004
• Configuration: 4-output DT-4 connector system
• Relay Rating: Dual 80A relays (12V DC)
• Harness Capacity: 75A total system capacity
• Maximum Load: 70A @ 12V DC
• Cable Specification: 10AWG heavy-duty cabling
• Connector Rating: 4 x 20A DT4 Deutsch connectors
• Cable Length: 2.0m from relay to connectors
• Fuse Protection: Dual 45A fuses

Features & Benefits

SMART Harness Intelligence
Advanced automatic polarity detection technology eliminates guesswork by working seamlessly with both positive and negative switching systems, ensuring compatibility across diverse vehicle platforms.

Professional Grade Construction
Heavy-duty 10AWG conductors with dual 80A relays provide exceptional current handling capacity for high-powered lighting installations while maintaining safety margins.

DRL Functionality Integration
Four DT4 Deutsch connectors with built-in DRL compatibility enable advanced lighting modes including daytime running light functionality for enhanced safety and versatility.

Plug and Play Installation
Quick connect compatible design eliminates cutting and soldering requirements, providing professional installation results without permanent vehicle modification.

Comprehensive Protection System
Dual 45A fuse protection with UV-rated insulation ensures system safety under heavy loads while providing long-term reliability in harsh automotive environments.

Technical Specifications

• Relay Configuration: 2 x 80A automotive relays
• Fuse Protection: 2 x 45A blade fuses
• Connector Type: DT & DT-4 Deutsch automotive grade
• Insulation Rating: UV rated for long-term durability
• Operating Voltage: 12V DC automotive systems
• Wire Gauge: 10AWG throughout harness
• Connector Current Rating: 20A per DT4 connector
• Environmental Protection: Waterproof and robust construction
• Switch Compatibility: Positive and negative switching systems

Scope of Delivery

• 1 x 4-way Output DT-4 Harness
• 2 x 80A Automotive Relays
• 2 x 45A Blade Fuses
• 1 x 0.78" Dime Switch (red illumination)
• 1 x Cable Tie Pack
• 1 x Comprehensive Wiring Diagram
• Installation Instructions
• 24 Month Warranty Protection

How It Works

Intelligent Switching System – The SMART Harness automatically detects vehicle switching polarity and configures itself accordingly, eliminating compatibility issues. The dual 80A relay system provides independent control for multiple lighting circuits while the DT4 connectors enable plug-and-play connection to compatible driving lights. The system activates with high beam engagement and supports DRL modes for enhanced functionality.

Compatible With / Goes Well With

Vehicle Compatibility: Universal application with automatic polarity detection for most 12V vehicles
Lighting Compatibility: All STEDI DT4-compatible driving lights with DRL functionality
Switch Integration: Compatible with OEM high beam switching and aftermarket switch systems
Installation Applications: High-powered lighting bars, multiple driving light arrays, professional installations

Frequently Asked Questions

What vehicles is this harness compatible with?

The SMART Harness features automatic polarity detection and works with most 12V vehicles, including traditionally difficult models like Toyota, Ford Ranger, and Mazda BT50. The intelligent system adapts to both positive and negative switching configurations.

Can this harness handle high-powered LED light bars?

Yes, with dual 80A relays and 75A total capacity using 10AWG conductors, this harness is specifically designed for high current applications and can safely handle multiple high-powered LED light bars simultaneously.

What is DRL functionality and how does it work?

DRL (Daytime Running Light) functionality allows compatible lights to operate at reduced power during daytime driving for enhanced visibility and safety, then switch to full power when high beams are activated.

Do I need to cut or modify my vehicle's wiring?

No, the plug-and-play design with quick connect compatibility eliminates the need for cutting, splicing, or soldering, making installation straightforward while preserving warranty coverage.

How many lights can this harness support?

The harness provides four DT4 connectors rated at 20A each, allowing up to four separate lights or light arrays to be connected, with total system capacity of 75A.

Is professional installation recommended?

While designed for straightforward installation with included diagrams, professional installation ensures optimal performance and safety, especially for high-powered lighting systems requiring proper mounting and electrical connections.