---
product_id: 14828219
title: "iJDMTOY 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns (Actual Horn Not Included)"
brand: "ijdmtoy"
price: "847921₫"
currency: VND
in_stock: true
reviews_count: 13
category: "I Jdmtoy"
url: https://www.desertcart.vn/products/14828219-ijdmtoy-12v-horn-wiring-harness-relay-kit-compatible-with-car
store_origin: VN
region: Vietnam
---

# 12V DC power rating 30-40 AMP max current capacity 4-pin SPST relay with socket iJDMTOY 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns (Actual Horn Not Included)

**Brand:** ijdmtoy
**Price:** 847921₫
**Availability:** ✅ In Stock

## Summary

> 🚗 Amplify your presence with power and precision!

## Quick Answers

- **What is this?** iJDMTOY 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns (Actual Horn Not Included) by ijdmtoy
- **How much does it cost?** 847921₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/14828219-ijdmtoy-12v-horn-wiring-harness-relay-kit-compatible-with-car)

## 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

- • **Built to Last:** Heavy-duty relay and metal contacts engineered for consistent, long-term performance.
- • **Dual Horn Ready:** Supports two horns simultaneously for that commanding, attention-grabbing sound.
- • **Effortless Power Boost:** Direct battery feed prevents overload on factory wiring for reliable horn blasts.
- • **Plug & Play Simplicity:** Pre-wired relay harness with inline fuse ensures safe, quick installation.
- • **Universal Compatibility:** Fits most 2-contact horns including Hella Supertone for seamless upgrades.

## Overview

The iJDMTOY 12V Horn Wiring Harness Relay Kit is a robust, pre-wired 4-pin SPST relay system designed to safely power high-draw car or truck horns up to 160W. It features a 12V DC rating, supports up to 40 amps, and includes an inline fuse for protection. Compatible with popular horn models like Hella Supertone, this kit simplifies installation by providing dual outputs for two horns, ensuring reliable, overload-free operation by drawing power directly from the battery.

## Description

Buy iJDMTOY 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns (Actual Horn Not Included): Wiring Harnesses - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Nice relay harness. - Nicely put together relay and wiring kit for a two-horn setup being added to your vehicle. My installation was to replace a single horn setup for a 2015 Honda Civic. The only way you can figure out what wires go where is to look at the photo on the desertcart website ad which shows the two horn connectors, the battery + and -, and the feed back to the original car + and - connections from the factory (hint, it's the bullet shaped ones). I had to cut off the bullet-shaped connectors for the original Honda connections and solder them together, not a big issue. One issue is that the feeds that go to the battery (+ and - ) should be foot or so longer. I had to splice in an extension, and the Civic is not a wide car. Each installation will be different, so I expected to have to do some home wiring. The fee a new pair of Hella 007424801 Twin Trumpet High/Low Tone horns. The original meep-meep POS Honda single horn only pulled 3.5 Amps. The new Hella units pull about 6 Amps each, thus the need for the dedicated power feed and relay. Works great.
Review: 2011 Mazda MX-5 - I replaced the Nautilus horn with this Hella Supertones and WOW! so much better. The wiring harness makes the install so much easier. Here are some tips to for a Mazda MX-5 Miata install with this combo: 1. There are mounting holes already in the car (Thank you Mazda!) you just need bolts. So pickup a pair of M6 - 1.00 x 16, and two M6 lock washers. You can also use M6 1.00 x 20 bolts. BTW, I also used some thread locker to keep it in there. 2. Take off the front bumper. Yes, it makes it so much easier. 3. The stock horn connector is a spade type and the kit is cylindrical, so you'll need to figure that out by changing one of them. I just change mine to new spade type connectors. 4. Run all the cable as per the directions in the kit and zip tie it to keep it nice and tidy. I hope this helps, LOVE my horn now. Dumb drivers and pedestrians on their phones too busy to watch where they are going to do not like how loud my horn is...LOL. Oh, some have use the stock horn connection, but I figured, since I'm already in there, why not do it right the FIRST time and not have to go back in and fix it. Here's the link to the Horn I installed: HELLA 003399801 Supertone 12V High Tone/Low Tone Twin Horn Kit

## Features

- One relay wiring harness set includes a 4-pin SPST relay module box, in-line safety fuse box, input +/- terminals, two terminals for triggering and dual metal contact outputs for reliable and efficient electrical connections
- The pre-wired 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 160W
- Two-wire universal fit inptut trigger, with dual outputs, good for most 2-contact horns such as Hella 003399801 Supertone and many other aftermarket high/low tone horns
- Perfect for power management, this relay harness is ideal for applications like high wattage horns 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 two pieces of supertone horns, attach red/black O-ring/C-ring to battery +/- or ACC/accessory 12V+/ground, route the signal triggering wires to origial horn sockets

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00XM107FC |
| Best Sellers Rank | #175,362 in Automotive ( See Top 100 in Automotive ) #780 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | iJDMTOY |
| Coil Voltage | 12 Volts (DC) |
| Connector Type | Wire Terminals Or Spade Connectors |
| Contact Type | Normally Open |
| Current Rating | 30 Amps |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,287) |
| Date First Available | May 13, 2015 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 9.5 ounces |
| Item model number | For Repair, Conversion, Custom Retrofit |
| Manufacturer | iJDMTOY Auto Accessories |
| Manufacturer Part Number | AA1147 |
| Minimum Switching Voltage | 12 Volts (DC) |
| Mounting Type | Socket Mount |
| OEM Part Number | Compatible with Subaru Impreza WRX STI and more 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 |
| Operation Mode | Manual |
| Product Dimensions | 2.17 x 7.87 x 6.02 inches |
| Voltage | 12 Volts |

## Product Details

- **Brand:** iJDMTOY
- **Connector Type:** Wire Terminals Or Spade Connectors
- **Contact Type:** Normally Open
- **Current Rating:** 30 Amps
- **Mounting Type:** Socket Mount

## Images

![iJDMTOY 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns (Actual Horn Not Included) - Image 1](https://m.media-amazon.com/images/I/81t6zpVTxwL.jpg)

## Questions & Answers

**Q: Would this work for an installation on a 2006 Honda Recon 250?**
A: Yes

**Q: Does this relay work with the hella horns or is this the same relay that comes with the hella horn?**
A: This relay does NOT work with Hella horns, I tried to use it to install them on my Subaru and they did not function at all. go with this. https://www.rallysportdirect.com/fits/2010-subaru-impreza-wrx-sti-special-edition-hatchback-2-5/horns/grm-040005-grimmspeed-wiring-harness-for-hella-horns?gclid=CN-Y9t6tss4CFcZahgodee8AYQ

**Q: : Does the relay delay the new horns and just play the OEM horn if you just hit the horn button?**
A: Are you leaving the OEM in as well?
I replaced the OEM one with the dual blast ones and they worked fine with no delay

**Q: at the time i ordered this i did not know it did not come with a relay harness... does anyone know a harness i can get that is compatible? /w 2 relay?**
A: iJDMTOY (1 12V Horn Wiring Harness Relay Kit Compatible with Car Truck Grille Mount Blast Tone Horns - COMES WITH A RELAY. This one fits all Subaru models.
But harnesses without relay should work as well. I bought it with a relay for better performance and to protect the Hella horns.
PS. Water and humidity will rust the relay connectors. I strongly recommend to apply a small amount of dielectric grease on all connector pins before installing.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice relay harness.
*by C***S on October 29, 2017*

Nicely put together relay and wiring kit for a two-horn setup being added to your vehicle. My installation was to replace a single horn setup for a 2015 Honda Civic. The only way you can figure out what wires go where is to look at the photo on the Amazon website ad which shows the two horn connectors, the battery + and -, and the feed back to the original car + and - connections from the factory (hint, it's the bullet shaped ones). I had to cut off the bullet-shaped connectors for the original Honda connections and solder them together, not a big issue. One issue is that the feeds that go to the battery (+ and - ) should be foot or so longer. I had to splice in an extension, and the Civic is not a wide car. Each installation will be different, so I expected to have to do some home wiring. The fee a new pair of Hella 007424801 Twin Trumpet High/Low Tone horns. The original meep-meep POS Honda single horn only pulled 3.5 Amps. The new Hella units pull about 6 Amps each, thus the need for the dedicated power feed and relay. Works great.

### ⭐⭐⭐⭐⭐ 2011 Mazda MX-5
*by G***E on May 30, 2018*

I replaced the Nautilus horn with this Hella Supertones and WOW! so much better. The wiring harness makes the install so much easier. Here are some tips to for a Mazda MX-5 Miata install with this combo: 1. There are mounting holes already in the car (Thank you Mazda!) you just need bolts. So pickup a pair of M6 - 1.00 x 16, and two M6 lock washers. You can also use M6 1.00 x 20 bolts. BTW, I also used some thread locker to keep it in there. 2. Take off the front bumper. Yes, it makes it so much easier. 3. The stock horn connector is a spade type and the kit is cylindrical, so you'll need to figure that out by changing one of them. I just change mine to new spade type connectors. 4. Run all the cable as per the directions in the kit and zip tie it to keep it nice and tidy. I hope this helps, LOVE my horn now. Dumb drivers and pedestrians on their phones too busy to watch where they are going to do not like how loud my horn is...LOL. Oh, some have use the stock horn connection, but I figured, since I'm already in there, why not do it right the FIRST time and not have to go back in and fix it. Here's the link to the Horn I installed: HELLA 003399801 Supertone 12V High Tone/Low Tone Twin Horn Kit

### ⭐⭐⭐⭐ just follow my notes above and you should be good.
*by A***R on January 23, 2016*

K not sure what everyone else is smoking here, but i'm going to confirm as of 1/23/16: This fits 2010 Subaru WRX with no issues. (1 Relay) (4 Spade Connectors) +/- for to each horn 2 Bullet Connectors) + Trigger Wire & - Chassis Ground (Note some cars do not utilize bullet connectors. Cut off and crimp a male spade (for Subaru's) (2 Battery Connectors) +/- for Battery Terminals INSTALL TIP: NO SOUND so i plugged in negative (Bullet Connector) into my OEM horn Trigger Plug and voila it worked. I'm coming from a setup that had the subymod harness gen 1 paired with hellahorns. That harness was absolute junk and failed within a few months of use. I than had that company send me another (gen2) i believe. This also failed. I applied further weatherproofing around the connectors etc. but the relay seems to have failed after a few additional months. Fast forward 1 year and half with out hella horns! Upset at the lack of ability to honk at idiot drivers, i decided to wire jup my own harness, than i found this.This item fits 2010 Subaru WRX and would fit a 13' wrx and a 11 legacy. Everyone stating there are cables missing, or the length is too short?? Its beyond me. Lack of instructions is why its only getting 4 stars, just follow my notes above and you should be good.

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-20*