---
product_id: 377090513
title: "H4 Headlight Relay Harness"
brand: "renmaii-light"
price: "€ 1.73"
currency: EUR
in_stock: false
url: https://www.desertcart.de/products/377090513-h4-headlight-relay-harness
store_origin: DE
region: Germany
---

# Dual high-durability relays for stable power Plug & play pre-wired harness, no wire mods High-temp ceramic sockets prevent overheating H4 Headlight Relay Harness

**Brand:** renmaii-light
**Price:** € 1.73
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Illuminate your ride with power and precision—never settle for less!

## Quick Answers

- **What is this?** H4 Headlight Relay Harness by renmaii-light
- **How much does it cost?** € 1.73 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/377090513-h4-headlight-relay-harness)

## Best For

- renmaii-light enthusiasts

## Why This Product

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

## Key Features

- • **Circuit Guardian:** Built-in relays and ceramic sockets protect your vehicle from electrical overloads and overheating.
- • **Seamless Upgrade:** Pre-wired harness ensures effortless installation—no need to alter factory wiring.
- • **Toyota-Ready Fix:** Specifically engineered to solve complex wiring issues in Toyota Pickup and Tacoma models.
- • **Brighten Your Drive:** Eliminates dim and flickering headlights for crystal-clear visibility.
- • **Hi/Low Beam Mastery:** Fixes malfunctioning headlights when switching between high and low beams, ensuring flawless performance.

## Overview

The RENMAII-LIGHT H4 Headlight Relay Harness is a plug-and-play solution designed to fix dim, flickering, and malfunctioning H4 9003 headlights. Featuring dual durable relays and high-temperature ceramic sockets, it protects your vehicle’s electrical system from overload and overheating. Ideal for Toyota Pickup and Tacoma models with complex wiring, this harness ensures reliable Hi/Low beam operation and a hassle-free upgrade to LED or HID headlights.

## Description

Features of H4 Headlight Relay Improve over-performance Independent design, easy to check No error when installing HID conversion kit. PE pipe with high heat resistance, never hardened. Pre-Wired for plug and play, no need to modify the stock wires at all. This is a h4/9003 12v headlight conversion harness with high temperature The two built-in durable relays and high-temperature ceramic headlight sockets can well protect the car circuit in the event of abnormal conditions. This h4 relay harness repair: -Dim Headlights -Back Feeding Power -Flickering Headlights -Malfunctioning Headlights when using Hi/Low Beams -Overloading the Headlight Switch -Overheating Plugs If you suffer from problems(,such as dim headlights, malfunctioning headlights) when replacing halogen lights to 7x6/h6054 led healdights, you need buy this h4 relay harness to fix those issues

## Features

- Designed to fix problems of dim headlight, back feeding power, flickering headlight and overheating plugs and overheating the headlight switch, malfunctioning H4 9003 headlights when using Hi/Low Beams.
- IMPORTANT NOTICE As To-yota Pickup and To-yota Tocoma use a double ground which leads to the headlights not work or only one beam work, this Harness is a must to fix the problem. It may be still complicated to wire in some new relays to run the headlights properly, TAKE IT EASY, it is not the issue of product quality, only because wiring circuit of To-yota series is a little complicated.
- Built-in two durable relays, high-temperature ceramic headlight sockets, can well proect the car circuit if there is any abnormal situation occur.
- This H6054 LED headlights wiring harness H4 9003 led headlight relay kit can be used for Jeep Pickup Tacoma 7x6 5x7 Headlights upgrade.
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | RENMAII-LIGHT |
| Brand | RENMAII-LIGHT |
| Product Dimensions | 18.49 x 9.98 x 7.49 cm; 331 g |
| Item model number | REN012 |
| Manufacturer Part Number | REN012 |
| Lift Type | Automatic |
| Item Weight | 331 g |

## Product Details

- **Brand:** RENMAII-LIGHT
- **Material:** Polyethylene, Ceramic
- **Item dimensions L x W x H:** 18.5 x 10 x 7.5 centimeters
- **Item weight:** 0.33 Kilograms
- **Connector type:** Ceramic

## Images

![H4 Headlight Relay Harness - Image 1](https://m.media-amazon.com/images/I/71qjqTbhvlL.jpg)
![H4 Headlight Relay Harness - Image 2](https://m.media-amazon.com/images/I/71z8Bw4YEuL.jpg)
![H4 Headlight Relay Harness - Image 3](https://m.media-amazon.com/images/I/81YnaeWwJaL.jpg)
![H4 Headlight Relay Harness - Image 4](https://m.media-amazon.com/images/I/81BhY3JQv8L.jpg)
![H4 Headlight Relay Harness - Image 5](https://m.media-amazon.com/images/I/71IgkduFlyL.jpg)

## Frequently Bought Together

- RENMAII-Light H4 Headlight Relay Harness,H4 Wiring Harness H6054 7x6 5x7 6054 Led Headlight Relay Kit for 95-97 Tacoma 88-95 Pickup Fix Dual Ground Problem 1Set 2-Headlight H4 Relay Harness
- HWSTAR Pair 180W 1000% Bright H6054 5x7 7x6 Led Headlights Compatible with Jeep Cherokee XJ Wrangler YJ DOT Anti-glare DRL Turn Signal Hi/Low Sealed Beam Ford Chevy GMC Toyota Nissan Dodge etc Balck
- KASLIGHT 1Set 2 Headlight Wiring Harness H4 Relay Harness H6054 LED Headlight Connector Socket Kit for 9003 6054 Toyota 95-97 Tacoma 88-95 Pickup Headlamp Fix Dual Light Dim Dual Ground Problem

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-02-21*