Baja Designs OnX6 / XL Hi-Power Wiring Harness w/ Mode Switch (2-Light Max | 355W)

Universal Fit | Part Number: 640119

Take full control of your off-road lighting with the Baja Designs OnX6 / XL Hi-Power Wiring Harness w/ Mode Switch. Designed for high-output lighting systems, this harness provides a complete, heavy-duty solution for powering and controlling your Baja Designs lights.

This advanced harness includes both an on/off toggle switch and a momentary mode switch, allowing you to easily switch between high and low power modes. It supports up to two lights with a maximum output of 355 watts, making it ideal for high-performance setups.

Built with premium wiring, relay, and fuse protection, this harness ensures reliable performance in the toughest off-road environments.

Key Features

• Universal fitment
• Part Number: 640119
• Designed for OnX6 and XL (Sport & Pro) lights
• High-power capacity (up to 355W)
• Supports up to 2 lights
• Integrated on/off toggle switch
• Integrated momentary mode switch (high/low control)
• Includes relay and inline fuse protection
• Heavy-duty wire gauge for high-output lights
• Plug-and-play installation
• Weather-resistant connectors
• Long lead length for flexible mounting
• Limited lifetime warranty

⚠️ Fitment Note (IMPORTANT)

❗ This is a universal wiring harness
❗ Compatible with Baja Designs OnX6 and XL (Sport & Pro) lights
❗ Designed for high-output light setups
❗ Supports up to 2 lights (355W max total)
❗ Verify light size and power requirements before ordering

👉 This is critical — prevents incorrect installs and returns

High / Low Mode Control

• Momentary switch allows dimming or mode control
• Switch between high and low output modes
• Perfect for street vs off-road lighting use

👉 More control than standard on/off harnesses

High-Power Lighting Capability

• Supports up to 355 watts total output
• Designed for large light bars and powerful setups
• Handles higher draw than basic harnesses

👉 Ideal for serious off-road lighting builds

Dual Light Setup Ready

• Powers up to two lights
• Perfect for dual light bar or pod setups
• Flexible for bumper, roof, or A-pillar installs

👉 Built for scalable lighting systems

Built for Off-Road Durability

• Heavy-duty wiring and sheathing
• Weather-resistant connectors
• Designed for vibration and harsh environments

Engineered for reliability in extreme conditions.

What’s Included

• Baja Designs Hi-Power wiring harness
• On/Off toggle switch
• Momentary mode switch
• Relay and inline fuse
• Battery terminals and connectors
• Installation-ready wiring leads

Specifications

• Compatibility: OnX6 / XL Sport / XL Pro
• Max Lights: 2 lights
• Max Output: 355W
• Switch Type: On/Off + Momentary Mode
• Voltage: 12V system
• Connector Type: Weather-resistant connectors
• Harness Type: High-power universal harness

Installation

Universal wiring application
Connects directly to battery
Includes relay and fuse protection
Switches mount inside vehicle cabin
Professional installation recommended
Typical install time: ~30–60 minutes

Why Buy from Iron Ridge Offroad

✔ Fast Shipping
✔ Authorized Premium Brands
✔ Fast Processing
✔ Off-Road Experts You Can Trust

Power your lighting the right way with the Baja Designs Hi-Power Wiring Harness w/ Mode Switch (640119) built for high-output systems, advanced control, and reliable performance in any off-road environment.