The Wide Open Design Brake Light Kit is a simple and reliable solution for plumbing a brake light activation to your trail rig using a hydraulic pressure switch. Designed for clean integration into your brake system, this kit allows you to trigger brake lights directly from brake line pressureideal for custom builds, tube chassis rigs, and vehicles without factory brake light switches.

Built around a compact -3 AN union with an integrated 1/8" NPT port, this kit makes it easy to install a brake pressure switch inline with your brake system. Whether you're wiring up a rock bouncer, buggy, or custom off-road build, this setup provides a clean, dependable way to ensure your brake lights function when it matters most.

Included Items

• (1) -3 AN union with 1/8" NPT port
• (2) -3 AN tube nuts
• (2) -3 AN ferrules

Specifications

• Inline -3 AN brake line union
• Integrated 1/8" NPT port for brake pressure switch
• Compatible with standard -3 AN brake line setups
• Compact design for easy routing in tight spaces
• Ideal for custom wiring and brake light activation systems
• Designed for off-road and custom vehicle applications

Fitment

• Universal fit for vehicles using -3 AN brake lines
• Ideal for tube chassis buggies, rock bouncers, and custom builds
• Works with most aftermarket brake pressure switches (1/8 NPT)
• Requires proper brake system bleeding after installation
• Professional installation recommended for brake system components

Tech Insight

Unlike mechanical brake light switches that rely on pedal movement, a hydraulic pressure switch activates based on actual brake line pressure. This ensures your brake lights come on exactly when braking force is appliedespecially useful in custom pedal setups where traditional switches can be inconsistent.

Using a -3 AN inline union with an NPT port keeps the install clean and serviceable. It allows you to integrate brake light functionality without adding brackets or complicated linkage setups, making it a go-to solution for clean, reliable wiring on custom builds.