MotoControl Bi-Xenon: H4/9003

The Morimoto MotoControl H4/9003 Bi-Xenon Relay Harness is designed to provide the stable power required for optimal HID system performance. Factory headlight wiring is engineered to operate standard halogen bulbs, but HID ballasts require a clean and consistent power source for reliable operation. By drawing power directly from your vehicle's battery, the MotoControl harness eliminates flickering, startup issues, and voltage fluctuations while maximizing the performance and longevity of your HID lighting system.

Stable Battery Power for Reliable HID Operation

A relay harness is an essential component for any HID conversion or Bi-Xenon projector retrofit. Instead of relying solely on the factory headlight circuit, the MotoControl harness supplies direct battery power to your HID ballasts, ensuring fast ignition, consistent brightness, and dependable performance in all driving conditions.

Advanced 8-Pin Relay Technology

Morimoto's third-generation 8-pin relay incorporates an integrated capacitor that stores electrical energy during the transition between low and high beams. This advanced design prevents interruptions caused by brief signal gaps commonly found on many vehicles, allowing your Bi-Xenon projectors to switch smoothly without flickering or ballast shutdown.

A weather-sealed relay connector provides superior protection against moisture, dirt, and corrosion for long-lasting reliability.

Universal Vehicle Compatibility

The MotoControl H4/9003 harness is compatible with both positive-switched and ground-switched headlight circuits, making it suitable for a wide variety of domestic, European, and import vehicles equipped with H4 (9003) headlights.

Easy Plug-and-Play Installation

Installation is completely plug-and-play with no cutting or splicing required. Simply connect the harness to your factory H4 headlight connector, attach the fused power lead to the battery, and connect the grounds. The extra-long wiring allows easy installation on compact cars, trucks, SUVs, and other larger vehicles.

Perfect for:

• HID Conversion Kits
• Bi-Xenon Projector Retrofits
• Morimoto H60 and other Bi-Xenon projector systems
• H4 / 9003 headlight applications

Premium OEM-Quality Construction

Engineered to Morimoto's renowned quality standards, the MotoControl harness features heavy-duty Techflex braided sleeving to protect the wiring from abrasion, heat, and vibration. The relay is enclosed in a durable anodized aluminum housing with laser-engraved branding, providing both exceptional durability and a clean OEM-style appearance under the hood.

Features

• Designed specifically for H4 / 9003 headlight applications
• Delivers stable battery power directly to HID ballasts
• Eliminates flickering and inconsistent HID operation
• Advanced 8-pin relay with integrated capacitor
• Seamless low and high beam switching for Bi-Xenon projectors
• Compatible with both positive- and ground-switched headlight circuits
• True plug-and-play installation with no wire cutting or splicing
• Heavy-duty Techflex braided wire protection
• Weather-sealed OEM-grade relay connector
• Long wiring suitable for cars, trucks, and SUVs
• Premium Morimoto engineering and build quality

Whether you're upgrading to an HID conversion kit or completing a custom Bi-Xenon projector retrofit, the Morimoto MotoControl H4/9003 Relay Harness delivers the dependable power, smooth operation, and OEM-quality reliability needed to get the best performance from your HID lighting system.