MotoControl Bixenon: 9007/9004

Relay Harness

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Morimoto Motocontrol 9007 9004 HB5 Bixenon Harness

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Due to the fact that your original low beam turns off when activating the high beam; without the proper harness your bi-xenon solenoids will drop, but the ballasts/lights will turn off! A headache for retrofitters.

We make it easy with the MotoControl 9004/9007 Bi-xenon relay harness. Designed to be completely plug-n-play, it's a seamless solution to keep your low and high beams under control.

The advanced MotoControl 8-Pin Relay has a tiny built-in capacitor that stores and releases it's charge between mode changes. So even if there's a short gap between low and high beam signals from your car, your HID's will run smoothly.

This harness is designed to work with both positive and ground switched headlight circuits, making it universally compatible with any vehicle no matter new or old.

With just a few color-coded and clearly labeled connections, even your mom could set this thing up on a car it's that easy. The wiring is spec'd to be long enough for big and small vehicles alike.

Aside from being a technical masterpiece, it's also a work of art. With its braided TechFlex insulation, anodized and laser engraved relay, it will surely look factory-fresh under the hood.

Buy from the company with the Internet's best reputation for unbeatable prices and killer customer service. The Retrofit Source Inc. is trusted by car guys world-wide, so we invite you to contact us today with your questions. Whether you need a recommendation on parts, have a tech question, or even a wholesale inquiry: our customer service team is here to help!


What's Included

  • 1x MotoControl 9004/9007 Bi-xenon Relay Harness
    Silver MotoControl
    Two Years
    Misc: Decal
    One-on-one Support


  • Ballasts: 35W, 50W
  • Original Bulb:
    9004, 9007, HB5
    All Bi-xenons

Tech Specs

  • Trigger Count: 1
  • Trigger Type: 9004/9007 3-pin
  • Power Count: 1
  • Power Type: 2-prong fork
  • Grounds Count: 2
  • Grounds Type: 2-prong fork
  • HID Ballasts Count: 2
  • HID Ballasts Type: Sealed "9006" style female
  • High Beams Count: 2
  • High Beams Type: Sealed "9006" style female

DIY Guide

  • 1 hrs Install Time
    • Time to install:
    • 1 hours (estimate)
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Product Reviews

Reviews for: MotoControl Bixenon: 9007/9004

  • 80 of 5 stars
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4 out of 5 stars
Based on: 1 user reviews
Jeffrey Lavin Reviewed: 12.14.2012
4 out of 5 stars

Overall build quality looks good. Would recommend a cold weather rated insulation for wires. This is advertised as plug and play for 9004 and 9007 wiring. I found that NOT to be the case. I have 9007 wiring, I plugged it in to find that only the low beam was working. The high beam indicator on my dash was lighting up for both high and low beam. I measured the voltage at the 9006 plug going to the bi-xenon solenoid and it was -13v on both wires on one plug and +3v on the other plug.

Knowing that 9004 and 9007 plugs are the same except the ground and the low beam wire are switched, I swapped these two wires on the plug and then the high/low functionality worked perfect with battery voltage and ground at each 9006 plug and the dash high beam indicator then worked correctly.