HD Relay: 9012

The Morimoto HD Relay Harness H10 is the professional solution for powering aftermarket HID lighting systems. Designed to deliver clean, consistent battery voltage directly to your HID ballasts, this premium relay harness eliminates many of the common problems associated with factory headlight wiring, including flickering, intermittent operation, and unreliable ballast startup.

Since most factory headlight circuits are designed to power halogen bulbs rather than HID ballasts, a dedicated relay harness is highly recommended for maximum lighting performance and long-term reliability.

Stable Power for Maximum Performance

By drawing power directly from the vehicle's battery, the Morimoto H10 provides your HID system with the stable voltage required for fast ignition and consistent light output. This helps improve ballast performance while reducing electrical strain on your factory headlight circuit.

Universal Plug-and-Play Design

Installation is quick and straightforward with a true plug-and-play design. No cutting, splicing, or permanent modifications are required. The universal wiring layout provides ample length for installation on most cars, trucks, SUVs, and off-road vehicles.

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

Broad Vehicle Compatibility

The Morimoto HD Relay Harness H10 is compatible with virtually any aftermarket HID kit using industry-standard ballast connectors.

Perfect for:

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

Important: Vehicles equipped with CANBUS electrical systems or pulsed Daytime Running Lights (DRLs) may require a Morimoto CANBUS or Mopar-specific harness instead.

Dual Relay Protection

Unlike inexpensive relay harnesses that use a single relay to power both headlights, the Morimoto H10 utilizes independent 40A sealed relays for each side of the vehicle. This design provides increased reliability and ensures that if one relay ever fails, the other headlight can continue operating.

Each relay includes:

• Fully sealed weather-resistant housing
• Silicone weather seals
• Built-in flyback diode for electrical protection
• Waterproof connectors throughout the harness

Premium Construction

Built using high-quality automotive components, the Morimoto H10 is engineered for years of dependable service.

Premium features include:

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

The result is a clean installation with an OEM-quality appearance under the hood.

Features

• Supplies stable battery voltage directly to HID ballasts
• Reduces flickering and unreliable HID startup
• Universal plug-and-play installation
• No cutting or splicing required
• Compatible with most aftermarket HID systems
• Suitable for low beams, high beams, and fog lights
• Dual independent sealed 40A relays
• Weatherproof OEM-grade construction
• Premium Techflex braided wire protection
• Designed for long-term durability and dependable performance

Package Includes

• 1 × Morimoto HD Relay Harness H10
• Complete wiring harness for one vehicle

Whether you're installing a new HID conversion kit or upgrading an existing system, the Morimoto HD Relay Harness H10 delivers the stable power, durability, and OEM-quality construction needed for reliable lighting performance in any driving condition.