HD Relay: 9005

The Morimoto HD Relay Harness H10 is designed to provide a stable and reliable power supply for your HID lighting system by drawing power directly from your vehicle's battery. Since factory headlight circuits are engineered to operate standard halogen bulbs—not HID ballasts—a relay harness is highly recommended to eliminate flickering, improve ballast startup, and ensure consistent HID performance.

Whether you're upgrading your headlights or fog lights, the H10 Relay Harness delivers the steady voltage your HID system needs for dependable operation.

Simple Plug-and-Play Installation

The Morimoto H10 features a true plug-and-play design with no cutting or splicing required. Its universal wiring layout and extended wire lengths allow for easy installation on a wide variety of vehicles, including compact cars, SUVs, and full-size trucks.

Simply connect the harness to the battery, plug it into your factory headlight connector, connect your HID ballasts, and you're ready to enjoy reliable HID performance.

Universal Compatibility

The Morimoto HD Relay Harness H10 is compatible with most aftermarket HID lighting systems and utilizes industry-standard ballast connectors that work with nearly all HID ballasts available today.

Ideal for use with:

• HID Low Beam conversions
• HID High Beam conversions
• HID Fog Light conversions

Please Note: Vehicles equipped with CANBUS electrical systems or pulsed Daytime Running Light (DRL) circuits may require a Morimoto CANBUS or Mopar-specific harness for proper operation.

Dual Relay Fail-Safe Design

Unlike many generic relay harnesses that rely on a single relay to power both headlights, the Morimoto H10 utilizes two independent sealed 40A relays, one dedicated to each side of the vehicle. This fail-safe design ensures that if one relay ever fails, the opposite headlight can continue operating, improving safety and reliability.

Each relay features:

• Fully sealed weather-resistant construction
• Ribbed silicone upper and lower seals
• Integrated flyback diode for back-EMF protection
• Weatherproof connectors throughout the harness

Built to withstand moisture, vibration, heat, and harsh weather conditions, the H10 is engineered for years of dependable performance.

Premium OEM-Quality Construction

Every Morimoto HD Relay Harness H10 is manufactured using premium automotive-grade materials for maximum durability and a factory-quality appearance.

Construction features include:

• Heavy-duty automotive wiring
• Abrasion-resistant Techflex braided sleeving
• OEM-style sealed relay housings
• Polished stainless-steel relay mounting bracket
• Weatherproof connectors throughout

The result is a clean, professional installation that looks right at home under the hood.

Features

• Provides stable battery power directly to HID ballasts
• Eliminates flickering and inconsistent HID operation
• Universal plug-and-play installation
• No cutting or splicing required
• Compatible with most aftermarket HID ballasts
• Suitable for low beams, high beams, and fog lights
• Dual independent sealed 40A relay design
• Flyback diode protection for increased relay life
• Weatherproof OEM-quality construction
• Premium Techflex braided wire protection

Package Includes

• (1) Morimoto HD Relay Harness H10
• Complete plug-and-play wiring solution for one vehicle

The Morimoto HD Relay Harness H10 is the perfect choice for enthusiasts looking to maximize the reliability and performance of their HID lighting system while maintaining a clean, OEM-style installation built to last.