H4 LED Headlight Wiring Harness, Universal H4 Head Light Relay Harness Kit
Description

 
Car Headlight H4 Brightening Wiring Harness, H4 LED Headlight Wiring Harness, Universal H4 Head Light Relay Harness Kit

 
Description
 
This H4 LED headlight brightness enhancement kit is specifically designed to address issues such as insufficient brightness, flickering, and dashboard error messages that can arise following an LED headlight conversion. It utilises high-conductivity copper-core wiring, which offers excellent electrical conductivity and low heat generation, providing a stable power supply. This enhances both the brightness and beam focus of the headlights, making it a practical accessory for upgrading your car’s LED headlights.

 
Key Features
 
Brightness Enhancement: This H4 headlight booster harness delivers a stable and high-capacity 200W power supply using high-conductivity copper core wiring, which significantly enhances light brightness and beam focus. It produces a brighter, more concentrated beam pattern, providing a clearer and longer-range view when driving at night.

 
Stable Working: The built-in intelligent solid-state decoding module effectively eliminates the annoying flickering and dashboard error warnings commonly associated with LED headlight conversions, providing stable headlight working without interference, thereby enhancing the driving experience and road safety.

 
Effective Protection: The control module is encased in a rugged IP66 level water-repellent and dust-repellent housing, which forms an impermeable barrier against rain, fog, dust, and road grime, thereby extending its service life.

 
High Safety: Equipped with a water-repellent fuse mechanism, it will blow instantly in the event of an abnormal current to protect both the wiring harness and your valuable headlights. The ceramic connector design provides a tight and secure connection, effectively preventing safety hazards such as poor contact and thermal short circuits, while the high-flame-retardant casing and wiring remain retardant to high temperatures without softening, providing safer driving.

 
Universal Fitment & Easy Installation: Featuring a wide-range DC 5-32V input design, it is compatible with both 12V and 24V vehicles. The standard H4 interface provides good compatibility with LED headlight conversions for most vehicles on the market equipped with H4 sockets. The plug-and-play wiring harness, combined with clear wiring diagrams, makes installation quick and straightforward.

 
Details

 
Application
It is ideal for drivers upgrading to H4 LED headlights on sedans, SUVs, or trucks who experience dim output, flickering, or dashboard errors and need a reliable plug-and-play wiring harness to achieve great brightness in rain, heat, or rugged road conditions.

 
Specifications
Color: Black
Material: Copper
Suitable Voltage: DC 5-32V (Supports 12V/24V Models)
Rated Power: 200W
Interface Specification: H4
Protection Level: IP66
Product Size: 162*5*3cm/63.78*1.97*1.18in
Package Size: 23.3*8.8*7.5cm/9.17*3.46*2.95in
Gross Weight: 0.28kg/0.62 lbs
Net Weight: 0.25kg/0.55 lbs

 
Package Included
1* H4 Brightening Wiring Harness Kit

 
Notes
Please allow the slight color difference caused by the shooting light and a 1-3cm error due to manual measurement, and make sure you do not mind before ordering.

 
Shipping:
 
2-9 working days to: USA
 
    •  
    • We maintain high standards of excellence and strive for hundred percent customer satisfaction. Feedback is very important to us. We hope that you contact us immediately before you give neutral or negative feedback, so that we can address your concerns. It is impossible to address issues if we do not know about them!
 
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Your satisfaction is our ultimate goal. We work hard to earn your trust and future business. Our certified technicians have tested each item before shipping. The unit comes with 1 year limited warranty on all manufacturing defects.
a) If you receive a defective item, you may return it or ask for a discount. Please contact us within 14 days after you receive the package.
b) What you returned must be intact and in its original packaging as re? u. Customer is responsible for shipping costs of the returned item.
c) We will cover the cost of shipping back t with the shipping rate indicated in the registration page. We will send you a new unit or refund the full payment you paid.
Thank you.
 
Monday To Friday: 8:30 AM to 5:00 PM (Beijing China time)
Due to time zones, our reply to your questions may not be immediately. But within above working time, we will reply your email within 24 hours. If it's non-workdays, please kindly be patient and wait till Monday.
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Please feel free to contact us if you have any questions.
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On Nov 6, 2026 at 01:55:11 PST, seller added the following information:

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