The Best H4 Conversion Kit of 2022 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best H4 Conversion Kit of 2022. Check our ranking below.

2,283 Reviews Scanned

SaleRank No. #1

KASLIGHT H4 Relay Harness 1Set 2 Headlight Connector H6054 LED Headlights H4 Wiring Harness Kit Brightness Intensifier for 9003 6054 Toyota Pickup Jeep Headlamp Fix Light Dim Dual Ground Problem

【FIX DIM HEADLIGHT ISSUES】This 1set 2-headlights h4 headlight relay harness Fixes cars with 2 pcs H4 plug headlamps, such as 7x6 5x7 headlights. Problems like Dim Headlights, Flickering Headlights, Back Feeding Power, Malfunctioning Headlights when using Hi/Low Beams can be fixed with this kaslight 2-headlight h4 headlamp relay. Make a big improvement for visibility on your cars at night.
【UPGRADE MADE SIMPLE】As Toyota Pickup and Toyota 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.Ditch the hassle and save some serious cash by using this wiring harness to flip your headlight system from ground-switched (2 toggled grounds + 1 constant hot) to positive-switched (2 toggled hots + 1 constant ground). Easy peasy!
【YOUR VEHICLE NEEDS THIS】Perfectly match old led headlight H6054 H5054 H6054LL 6014 6052 6053 negative switched vehicles like Toyota, Jeep Pickup, Tacoma, Subaru, Mitsubishi, or Suzuki 7x6 5x7 led headlight harness.
【IMPORTANT NOTICE】If your socket pin is not standard, KASLIGHT H4 9003 HB2 Wiring Harness is needed, 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.
【ALSO FIXES】: Overloading the Headlight Switch, Overheating Plugs. If you are upgrading to LED Bulbs or are having trouble with your 7"x6"headlight, 4x6"led headlight, 5-3/4" or any other H4 plug headlights not working properly, plug-n-play conversion harness, this is your fix!! Package includes one set h4 socket led headlight relay kit.

SaleRank No. #2

True Mods H6054 H4 LED Headlight Wiring Harness [Negative Switched Conversion] [Fused] Universal H4 Head Light Relay Harness Kit for 9003 H5054 H6054LL 6014 H6024 6052 6053 Subaru Toyota Jeep Headlamp

YOUR VEHICLE NEEDS THIS - Swapping out old headlights ( H6054 H5054 H6054LL 6014 6052 6053) for LEDs on negative switched vehicles like Toyota, Subaru, Mitsubishi, or Suzuki, is not a simple job. But with our plug-n-play conversion harness it can be!
CONVERSION MADE EASY - Save time, money, and headache by utilizing this wiring harness to convert a ground switched headlight system (2 toggled grounds + 1 constant hot) to a positive switched headlight system (2 toggled hots + 1 constant ground).
NO LOW-QUALITY PARTS HERE - Designed with two durable relays, high-temperature ceramic headlight sockets, and heat-resistant polycarbonate wire loom. This harness is built to last.
THE WAY IT SHOULD BE - We set out to build a harness that would install with as little effort as possible. The result? A conversion harness that takes only minutes to install and works every time.
PRESERVE YOUR STOCK COMPONENTS - The beauty of this conversion harness is that you don't need to cut into your stock wiring harness. This dramatically reduces the install time, and if you need to, even makes the process completely reversible.

Rank No. #3

Hella 002395801 Vision Plus 165mm 12V High/Low Beam Halogen Conversion Headlamp Kit (H4 ECE), Multi

Based on European headlamp technology, HELLAâ€s Vision Plus produces a 50 percent more powerful low beam and a 25 percent more powerful high beam than standard halogen sealed beam headlamps
Replaces 7 inch sealed-beam lamp units (H6024)
Kits contain 2 lamps, bulbs, silicone dust covers
Hella 002395801 Hlmp Kit 7" 165Mm H4 12V Ece

Rank No. #4

Ronybuy H4 Relay Harness 9003 Headlight Relay Wiring Kit Ceramic Socket Plugs for 7x6 5x7 H6054 6054 Headlights Conversion Kit, Fit for Toyota 95-97 Tacoma 88-95 Pickup, Fix Dual Ground Problem

【Functions】If you have trouble with 7x6" , 4x6", or 5-3/4" headlights not working properly, such as dim headlight, back feeding power, flickering headlight and overheating plugs and overheating the headlight switch, malfunctioning H4 9003 headlights when using high low beams,this relay kit can be the solution.
【Compatibility】Perfect relay wire harness kit replacement for H4 9003 headlight, H6054 H5054 H6054LL 6014 6052 6053 LED headlights relay conversion kit. With this kit, you will have further and wider visibility to see the deer, wild animals, falling rocks or other obstacles in advance to ensure safer driving at night. 30%-50% brightness improved than before or a new car.
【Fitment】The H6054 headlights relay wiring harness H4/9003 led headlight relay kit can be used for pickup 7x6 5x7 headlights upgrade. Fit for Toyota 95-97 Tacoma 88-95 pickup headlights. Plug and play, you can find the wiring diagram in the package.
【High Quality】The 40A H4 relay conversion kits is waterproof and come with two relays and ceramic socket plugs which are heat-resistant and corrosion-resistant, durable and stable, can work in any harsh conditions. The built-in 25A fuse ensures the safety and long lifespan.
【Notice】Please make sure the working voltage is 12V, since this headlight relay harness doens't fit 24V voltage.If your socket PINs on your vehicle are not standard to guarantee your 4"x6" 7"x6" 5"x7" work normally, the H4 9003 HB2 relay wiring harness is needed.

Rank No. #5

True Mods 2pc H4 (9003/HB2) Headlight Socket Converter Kit [for H4652, H4656, H4666, H6545] [Plug and Play] Head Light Wiring Harness Connector Plug

PLUG AND PLAY SIMPLICITY - No need to figure out how to cut into your stock wiring and solder new connections, our adapter harness is a clean and straightforward way to avoid rewiring your headlight harness.
EASILY ADAPTABLE - Adjustable terminal locations make this adapter a perfect fit for three terminal, two terminal, rectangular or round sealed beam headlights. Easily converts LED headlights with H4 pinout to H4652, H4656, H4666, H6545, and others.
TIME SAVER - Our simple design, with color-coded wires, standard plugs, and moveable terminals helps you get the job done faster and get back on the road in record time.
MONEY SAVER - Since there is no need to adjust or remove the OEM socket you can easily convert your vehicle back to stock headlights if you ever need to.
MORE THAN A WARRANTY - We've got you covered with an industry leading two-year warranty and the best customer support in the business.

Rank No. #6

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

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.
As To-yota Pickup Tocoma use a double ground which leads to the headlights not work or only one beam work, this Harness is to fix the problem. run the headlights properly,only because wiring circuit of To-yota series is a little complicated.
Assembly Before You Find Out The Model Of Working Voltage Is 12v, This Headlight Relay Harness Can'T Install And Use 24v Voltage.
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 Pickup Tacoma 7x6 5x7 Headlights Upgrade.

SaleRank No. #7

iJDMTOY One Pair 9003 H4 (Male) to H13 9008 (Female) Converter Adapter Socket Wiring Harness Kit

Includes one pair of 6" long wiring adapters, featuring 9008/H13 female connectors on one end and H4/9003/HB2 male connectors on the other end, ensuring seamless integration and easy plug-and-play installation
Due to the close resemblance of various connector, ensure compatibility by comparing the shape, checking the locking tab design, and terminal/contact/pin count with the images against your application assembly prior to purchase!
This set of wiring harness with adapter featuring an direct fit electric socket connector with a versatile pigtail/wire setup to ensure robust electrical connectivity
Socket/adapter crafted from heat-resistant nylon plastic, with good conduction copper wiring cable encased in a silicone insulation tube, designed for durability and safety, making it a reliable choice for your electrical needs
This pre-wired system is ideal for repair, replacement, or custom DIY retrofit/upgrade, eliminating many tedious cutting, soldering splicing and rewiring across various applications

Rank No. #8

FAHREN H4 Driving Light Bulbs 800% Super Bright 9003 Fog Bulbs with 12000 RPM Turbo Fan, 6500K Cool White IP68 Waterproof Pack of 2

800% Brighter Than Stock Bulbs: Equipped with advanced CSP chips, these H4 fog light bulbs deliver a powerful 26,000LM/Set output, offering 800% more brightness than standard bulbs. The 6500K cool white light ensures enhanced visibility, making nighttime driving clearer and safer.
50,000-Hour Lifespan: Designed with a high-speed turbo fan and aerospace-grade aluminum housing, these fog bulbs provide superior heat dissipation, extending their lifespan to an impressive 50,000 hours. This ensures long-lasting performance with minimal maintenance.
1:1 Beam Pattern: Featuring a precision 1:1 design with the original filament, these fog light bulbs offer a perfectly aligned beam pattern that delivers 360° illumination without any dark spots or glare, ensuring safe and balanced visibility.
Quick & Easy Installation: With a plug-and-play design, these 9003 fog light bulbs fit perfectly into the vehicle’s factory housing. No additional wiring or modifications are needed, allowing for installation in just 10 minutes. Simply follow the included instructions for a hassle-free setup.
【NOTE】- Some vehicles need specific retainers to hold the bulb, these specific retainers are not included in the package, as not all models request a retainer and different models request different retainers, it's unrealistic to put hundreds of different retainers in each package. Our bulbs can be used for powersports ATV/UTV or fog lights. Please let us know if you can’t figure it out or need any help.

Rank No. #9

IHNZCB 7X6 Inch H6054 Glass Square Headlight Housing + H4/9003 High Low Beam Bulbs for Cars,Truck and Van,Halogen Sealed High Low Dual Beam,OEM Style Original Classic Look Conversion Assembly Pair Kit

【Package Include】This item include pair 7x6 inch H6054 Glass Square Headlight Housing(with 2 wire harnesses) and pair inside H4/9003 led bulbs. Please confirm your original housing model before purchasing.
【High Brightness】7 inch square headlight housing adopt glass lampshade unique design, improved beam pattern,with the addition of IHNZCB H4 bulbs,which can give full play to the maximum brightness of the light, and no yellowing phenomenon,increase vehicle's night driving experience,helping drivers receive better views and road reflections.
【Original Classic Look】Adopts 1:1 size design with original halogen housing,maintain the stock look of your vehicle's glass headlights,enhance visibility and safety without compromising the original aesthetic appeal of your vehicle, preserving its classic or stock appearance.
【Long-lasting Durability】Glass headlight and high temperature flame retardant plastic lamp shell back, built to withstand harsh environments and prolonged usage. They are resistant to vibrations, shocks, and temperature variations, ensuring a long lifespan and reducing the need for frequent replacements or maintenance.
【Important Tips】Housing has removable bulb sockets for you to install the new led bulbs,for most of vehicles, these headlights are plug and play,just a little of models need to mark and file a tab slot into your headlight bucket or grind off the tab. If you have any issues regarding product,please contact us to get help and solutions.

Rank No. #10

HELLA 003427811 Hlmp Kit 190X132Mm H4 12V Ece, Multi

Package Dimensions: 9.34 L x 7.35 H x 8.71 W (inches)
Package Weight : 5 pounds
Country of Origin : Germany
Part number: 003427811

Last update on 2025-03-25 / Affiliate links / Images from Amazon Product Advertising API

How Do You Buy The Best H4 Conversion Kit?

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Potential sources can include buying guides for H4 Conversion Kit, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible H4 Conversion Kit. Make sure that you are only using trustworthy and credible websites and sources.

We provide an H4 Conversion Kit buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available H4 Conversion Kit currently available on the market.

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Brand Value: Every brand of H4 Conversion Kit has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
Features: What bells and whistles matter for an H4 Conversion Kit?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your H4 Conversion Kit.
Customer Ratings: Number ratings grade H4 Conversion Kit objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their H4 Conversion Kit.
Product Quality: You don’t always get what you pay for with an H4 Conversion Kit, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an H4 Conversion Kit is should be an indication of how long it will work out for you.

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The Best H4 Conversion Kit of 2022 – Reviewed and Top Rated

How Do You Buy The Best H4 Conversion Kit?

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