---
product_id: 41485480
title: "- [ALL STAR TRUCK PARTS] 4-Headlight Relay Wiring Harness H4 Headlamp Light Bulb Ceramic Socket Plugs Set"
brand: "all star truck parts"
price: "€ 62.44"
currency: EUR
in_stock: true
reviews_count: 13
category: "All Star Truck Parts"
url: https://www.desertcart.fi/products/41485480-all-star-truck-parts-4-headlight-relay-wiring-harness-h4
store_origin: FI
region: Finland
---

# Compatible with H4 halogen bulbs Direct battery power draw Ceramic socket plugs for durability - [ALL STAR TRUCK PARTS] 4-Headlight Relay Wiring Harness H4 Headlamp Light Bulb Ceramic Socket Plugs Set

**Brand:** all star truck parts
**Price:** € 62.44
**Availability:** ✅ In Stock

## Summary

> 💡 Power Up Your Night Drives with Confidence!

## Quick Answers

- **What is this?** - [ALL STAR TRUCK PARTS] 4-Headlight Relay Wiring Harness H4 Headlamp Light Bulb Ceramic Socket Plugs Set by all star truck parts
- **How much does it cost?** € 62.44 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/41485480-all-star-truck-parts-4-headlight-relay-wiring-harness-h4)

## Best For

- all star truck parts enthusiasts

## Why This Product

- Trusted all star truck parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Brighten Your Drive:** Eliminates dim and flickering headlights by powering directly from the battery, ensuring consistent illumination.
- • **Plug & Play Upgrade:** Seamlessly fits 7"6", 4x6", 5-3/4" and other H4 headlights for hassle-free installation.
- • **Protect Your Switch:** Bypasses headlight switch overload and prevents overheating plugs for longer component life.
- • **Universal Compatibility:** Perfect for upgrading to halogen bulbs or fixing malfunctioning headlights on a wide range of vehicles.
- • **Reliable Ceramic Sockets:** Durable ceramic plugs resist heat and corrosion, maintaining stable connections under pressure.

## Overview

The ALL STAR TRUCK PARTS 4-Headlight Relay Wiring Harness upgrades your vehicle’s lighting system by drawing power directly from the battery, bypassing the headlight switch to prevent dimming, flickering, and overheating. Featuring durable ceramic socket plugs and compatibility with various H4 halogen bulbs, this harness ensures brighter, more reliable headlights for safer night driving.

## Description

desertcart.com: [ALL STAR TRUCK PARTS] 4-Headlight Relay Wiring Harness H4 Headlamp Light Bulb Ceramic Socket Plugs Set : Automotive

Review: Let there be light - This harness enables your headlights to run directly off the battery. The harness just plugs into your existing headlight socket so your headlight switch still operates the headlights. The new harness has two wires that go to the battery and four ground wires, very simple. Take a picture of your headlights before and after, you will be amazed at the difference.
Review: A little less plug & play then stated. - Needed to upgrade 32yr old headlamps on a Grand National. The price is great, the speed of delivery is pretty good. The product is okay but not as plug and play as stated. You will want some automotive electrical experience since not wired correctly at plugs for bulbs. You will need to research your headlamps wiring and verify pins. I had to swap all terminals around to get lamps to function properly and not feed back in system. Also, relays are different ratings and needed to swap after correcting connections in plugs. The lamps would cut off after 30 seconds with high beams on, it was over powering the weaker relay installed in the wrong spot. After fixing these issues works good. Not a show quality harness. But, as a daily driver and use item I am please. Just research your wiring for car and be patient. It will work.

## Features

- This Harness Fixes
- Dim Headlights, Flickering Headlights, Back Feeding Power, Malfunctioning Headlights when using Hi/Low Beams
- Also fixes: Overloading the Headlight Switch, Overheating Plugs
- If you are upgrading to Halogen Bulbs or are having trouble with your 7"6", 4x6", 5-3/4" or any other H4 plug headlights not working properly, this is your fix!!
- THIS HARNESS BYPASSES THE POWER DRAW FROM THE HEADLIGHT SWITCH AND PULLS THE POWER DIRECTLY FROM THE CARS BATTERY, BUT STILL USES THE STOCK HEADLIGHT SWITCH TO ACTIVATE THE RELAYS TO TURN THE HEADLIGHTS ON AND OFF.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XJ771YQ |
| Best Sellers Rank | #92,993 in Automotive ( See Top 100 in Automotive ) #360 in Automotive Replacement Electrical Wiring Harnesses |
| Brand | All Star Truck Parts |
| Connector Type | Ceramic Plugs |
| Date First Available | March 10, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8.8 ounces |
| Item model number | ASTPH44 |
| Manufacturer | All Star Truck Parts |
| Material | Ceramic |
| Package Dimensions | 7.52 x 4.8 x 1.5 inches |
| Wire Diameter | 1.52 Millimeters |

## Product Details

- **Brand:** All Star Truck Parts
- **Connector Type:** Ceramic Plugs
- **Item Weight:** 0.25 Kilograms
- **Material:** Ceramic
- **Wire Diameter:** 1.52 Millimeters

## Images

![- [ALL STAR TRUCK PARTS] 4-Headlight Relay Wiring Harness H4 Headlamp Light Bulb Ceramic Socket Plugs Set - Image 1](https://m.media-amazon.com/images/I/812LnEhwuLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Let there be light
*by S***G on February 9, 2024*

This harness enables your headlights to run directly off the battery. The harness just plugs into your existing headlight socket so your headlight switch still operates the headlights. The new harness has two wires that go to the battery and four ground wires, very simple. Take a picture of your headlights before and after, you will be amazed at the difference.

### ⭐⭐⭐⭐ A little less plug & play then stated.
*by A***R on March 4, 2020*

Needed to upgrade 32yr old headlamps on a Grand National. The price is great, the speed of delivery is pretty good. The product is okay but not as plug and play as stated. You will want some automotive electrical experience since not wired correctly at plugs for bulbs. You will need to research your headlamps wiring and verify pins. I had to swap all terminals around to get lamps to function properly and not feed back in system. Also, relays are different ratings and needed to swap after correcting connections in plugs. The lamps would cut off after 30 seconds with high beams on, it was over powering the weaker relay installed in the wrong spot. After fixing these issues works good. Not a show quality harness. But, as a daily driver and use item I am please. Just research your wiring for car and be patient. It will work.

### ⭐⭐⭐⭐⭐ Surprisingly decent
*by A***N on August 31, 2024*

This was a retrofit for a 4th Gen firebird, using h1 and 9005 projectors. Plugs didn't matter since I would be changing them anyway. The wiring actually feels decent, no idea if it's OFC or AL clad. the relays seem decent. I ran a 3A diode on pins 87 to keep my low beams at the same time as my projector high beams, works great so far.

## Frequently Bought Together

- [ALL STAR TRUCK PARTS] 4-Headlight Relay Wiring Harness H4 Headlamp Light Bulb Ceramic Socket Plugs Set
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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-16*