Eliminate flickering, dimming, and complex wiring headaches with the Primelux PWH-02H4. This precision-engineered relay harness is the definitive solution for upgrading to high-performance H4 LED headlights, ensuring your lighting system receives a stable, direct-from-battery power supply. Whether your vehicle utilizes positive or negative switching, this intelligent harness adapts seamlessly to provide consistent, flicker-free illumination.

Designed for the rigors of professional off-road and industrial use, the PWH-02H4 bypasses aged factory wiring to deliver maximum voltage directly to your lamps. By reducing heat stress on your original headlight switches and providing industrial-grade circuit protection, it doesn't just improve your light output—it protects your vehicle’s electrical integrity in the most demanding environments.

Features

• Universal Switching Compatibility: Engineered with a smart dual-mode circuit that supports both positive and negative switched headlight systems, ensuring a perfect fit for a vast range of vehicle platforms.
• Industrial-Grade Safety Cabling: Constructed with heavy-duty 14 AWG and 16 AWG UL 1015 copper wiring, designed to handle high current loads while strictly adhering to international safety standards.
• Advanced Weatherproofing: Features dual-layer heat shrink tubing on relay sockets and a fully sealed waterproof adhesive relay. The integrated 30A fuse is housed in a rugged, moisture-proof box for fail-safe operation in all climates.
• High-Conductivity Terminals: Equipped with precision-stamped M8 copper ring terminals to maximize contact surface with battery studs, effectively eliminating resistance and preventing wire overheating.
• Mechanical Integrity: Every connector and terminal is engineered to withstand extraction forces of up to 80N, ensuring the harness remains securely seated even under extreme vibration or mechanical stress.

Technical Specifications

What's in the Box

• 1 x Primelux H4 Heavy-Duty Relay Wiring Harness
• 1 x Adapter Harness Compatibility Pack
• 1 x Professional Installation Guide