---
product_id: 33529505
title: "iJDMTOY High/Low Relay Wire Harness Compatible with Original H4 Dual-Beam to Separated 9005/9006 Hi/Lo Beams"
brand: "ijdmtoy"
price: "¥5969"
currency: JPY
in_stock: true
reviews_count: 9
category: "I Jdmtoy"
url: https://www.desertcart.jp/products/33529505-ijdmtoy-high-low-relay-wire-harness-compatible-with-original-h4
store_origin: JP
region: Japan
---

# 12V DC, 30-40AMP max power Supports up to 320W lighting load Dual 4-pin SPST relay modules iJDMTOY High/Low Relay Wire Harness Compatible with Original H4 Dual-Beam to Separated 9005/9006 Hi/Lo Beams

**Brand:** ijdmtoy
**Price:** ¥5969
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your ride’s lighting game with pro-grade power and precision!

## Quick Answers

- **What is this?** iJDMTOY High/Low Relay Wire Harness Compatible with Original H4 Dual-Beam to Separated 9005/9006 Hi/Lo Beams by ijdmtoy
- **How much does it cost?** ¥5969 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/33529505-ijdmtoy-high-low-relay-wire-harness-compatible-with-original-h4)

## Best For

- ijdmtoy enthusiasts

## Why This Product

- Trusted ijdmtoy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Light Control:** Supports up to 4 separate light outputs for versatile lighting setups
- • **Battery Direct Power:** Draws power straight from the battery to protect your vehicle’s wiring
- • **Safe & Easy Installation:** Includes in-line fuse and clear wiring for hassle-free, secure setup
- • **Heavy-Duty Power Handling:** Handles up to 40 amps for reliable, high-current applications
- • **Plug-and-Play Compatibility:** Seamlessly fits original H4 dual-beam to separated 9005/9006 headlights

## Overview

The iJDMTOY High/Low Relay Wire Harness is a robust 12V DC relay system designed to convert original H4 dual-beam headlights into separated 9005/9006 high/low beams. Featuring dual 4-pin SPST relays rated for 30-40 amps and supporting up to 320 watts, it ensures safe, efficient power delivery directly from the battery. Ideal for upgrading fog lights, off-road light bars, and custom lighting setups, this harness protects your vehicle’s wiring while enabling easy, reliable control of multiple lighting devices.

## Description

Buy iJDMTOY High/Low Relay Wire Harness Compatible with Original H4 Dual-Beam to Separated 9005/9006 Hi/Lo Beams: Wiring Harnesses - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Great product - Awesome to yes if you know what you're doing
Review: Miata NB1 to NB2 Headlight Conversion - I did a headlight conversion from a Mazda Miata NB1 to NB2 and used this wiring harness. The NB1 Miata has a ground switching circuit, so the diode in the harness needs to be removed. Once that's done, the low beams stay on when I turn on the high beams. The indicator on the dash also works. I wouldn't say this is super amazing quality, but it gets the job done and has been working so far, so I recommend the product!

## Features

- One relay wiring harness set includes two 4-pin SPST relay module boxes, in-line safety fuse box, input +/- terminals, and H4/HB2/9003 input trigger and four 9006/HB4/9005/HB3 outputs for reliable and efficient electrical connections
- The pre-wired dual SPST 4-pin electrical relay unit, complete with socket and rated at 12V DC with a maximum of 30-40AMP, is ideal for most heavy duty electronic devices, light applications between 9-16V DC, with a wattage not exceeding 320W
- H4/9003/HB2 inptut trigger, with four sets of HB4/HB3 outputs, good for light applications with socket sizes of 9006/9012/HB4, 9005/HB3 H10 9145 9140 9055, etc
- Perfect for power management, this relay harness is ideal for applications like front fog/driving lights and off-road lightbars, pod lamps drawing power directly from the battery to prevent excessive load on the vehicle’s existing wiring system and ensuring safe, easy on/off operation
- Installation tips: connect output contacts to up to 4 light applications/devices, attach red/black O-ring/C-ring to battery +/- or ACC/accessory 12V+/ground, connect the signal triggering wires to existing/factory adapter to trigger the on/off operation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01M15V3HK |
| Best Sellers Rank | #263,710 in Automotive ( See Top 100 in Automotive ) #1,179 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | iJDMTOY |
| Customer Reviews | 4.2 4.2 out of 5 stars (139) |
| Date First Available | September 20, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8 ounces |
| Item model number | For Repair, Conversion, Custom Retrofit |
| Lift Type | Manual |
| Manufacturer | iJDMTOY Auto Accessories |
| Manufacturer Part Number | AA1089a |
| OEM Part Number | Years: 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020, etc |
| Package Dimensions | 9.37 x 4.06 x 0.98 inches |
| Position | Right |
| Special Features | High Beam |
| Wattage | 320 watts |

## Product Details

- **Brand:** iJDMTOY
- **Connector Type:** H4, 9006, Hb3
- **Item Weight:** 0.5 Pounds
- **Manufacturer:** iJDMTOY Auto Accessories
- **Material:** Ceramic and Copper Wires

## Images

![iJDMTOY High/Low Relay Wire Harness Compatible with Original H4 Dual-Beam to Separated 9005/9006 Hi/Lo Beams - Image 1](https://m.media-amazon.com/images/I/71jHAPJlqYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product
*by R***S on August 27, 2025*

Awesome to yes if you know what you're doing

### ⭐⭐⭐⭐⭐ Miata NB1 to NB2 Headlight Conversion
*by P***Z on April 17, 2025*

I did a headlight conversion from a Mazda Miata NB1 to NB2 and used this wiring harness. The NB1 Miata has a ground switching circuit, so the diode in the harness needs to be removed. Once that's done, the low beams stay on when I turn on the high beams. The indicator on the dash also works. I wouldn't say this is super amazing quality, but it gets the job done and has been working so far, so I recommend the product!

### ⭐⭐⭐⭐ decent product but you get what you pay for
*by A***R on January 12, 2024*

product worked as advertised but was too short so i needed to extend multiple leads which was fine and is what it is but overall its just a cheap product so dont expect too much

## Frequently Bought Together

- iJDMTOY High/Low Relay Wire Harness Compatible with Original H4 Dual-Beam to Separated 9005/9006 Hi/Lo Beams
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-05*