Headlight Relay Harnesses

Headlight relay harnesses are a critical component for ensuring reliable performance from LED and HID lighting upgrades. Designed to deliver consistent power directly from the battery, relay harnesses help eliminate common issues like flickering, voltage drop, and inconsistent output that can occur with factory wiring.

By bypassing weak OEM circuits, a quality relay harness ensures your upgraded headlights receive the full voltage they need to perform at their best. This results in brighter output, improved startup reliability, and longer component lifespan—especially important for high-performance HID systems and powerful LED setups.

Available in vehicle-specific and universal configurations, relay harnesses are designed for straightforward installation with minimal wiring. Whether you’re upgrading headlights, fog lights, or auxiliary lighting, a relay harness is a smart investment in both performance and electrical safety.

Why Use a Headlight Relay Harness?

• Provides direct battery power to lighting systems

• Reduces flickering and inconsistent output

• Improves reliability for LED and HID upgrades

• Protects factory wiring and switches

• Simple installation with plug-and-play options

People Also Ask

Q: Do LED headlights need a relay harness?

A: Not always, but a relay harness can improve stability and performance in many setups.

Q: Are relay harnesses required for HID kits?

A: Yes—HID systems typically perform best with a dedicated relay harness.

Q: Is installation difficult?

A: No—most relay harnesses are designed for quick, straightforward installation.