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KASLIGHT H4 Relay Harness 1Set 2 H6054 7x6 6054 Polycarbonate Headlight H4 Relay Harness Pickup Headlights H4 Wiring Harness Kit For Toyota 95-97 Tacoma 88-95 Pickup Fix Dual Ground Problem, black

4.5 4.5 out of 5 stars 1,776 ratings
$21.99
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Purchase options and add-ons

Current Rating 30 Amps
Brand KASLIGHT
Operation Mode Automatic
Maximum Switching Current 30 Amps

About this item

  • This 1set 2-headlights h4 headlight relay harness Fixes cars with 2 pcs H4 plug headlamps, such as 7x6 led 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.
  • 【IMPORTANT NOTICE】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. 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 Toyota series is a little complicated.
  • 【YOUR VEHICLE NEEDS THIS】Perfectly match KASLIGHT H6054 H5054 H6054LL 6014 6052 6053 7X6 led headlights 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", 4x6", 5-3/4" or any other H4 plug headlights not working properly, this is your fix!! Package includes one set h4 socket led headlight relay kit.
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 7.09 x 4.37 x 2.83 inches; 7.37 ounces
  • Item model number ‏ : ‎ 8542081869
  • Date First Available ‏ : ‎ March 7, 2018
  • Manufacturer ‏ : ‎ KASLIGHT
  • ASIN ‏ : ‎ B07B9QQMMH
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.5 4.5 out of 5 stars 1,776 ratings

Product Description

Why Choose KASLIGHT Products?

On a dark raining night, paying all attentions on the road and still feel scared surrounding by darkness. Carefully making every swerve to avoid any danger from coming vehicles. Night driving is like a dangerous adventure especially with the dim stock halogen lights.That is the reason why we focus on Vehicle light devices.

We have been working on manufacturing LED products&related wiring harness for more than 20 years and start e-commerce business at January of 2018 . Our purpose is to provide our customers the best performance light devices to let them no longer fear the dark night driving.

H4 Relay

Kaslight H4 headlight relay harness

Which vehicle is suitable for this H4 harness?

H4/9003 conversion, H6054/6054/7x6/5x7 headlights

This means any vehicle that uses H4 headlights, Jeep Wrangler YJ Cherokee XJ truck, Toyota pickup, etc.

h4 harness

What special features does KASLIGHT H4 Headlight Relay have?

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.

relay harness

This harness repair:

  • Dim Headlights
  • Back Feeding Power
  • Flickering Headlights
  • Malfunctioning Headlights when using Hi/Low Beams
  • Overloading the Headlight Switch
  • Overheating Plugs

SPECIFICATIONS

Votage: 12V

Cable Length: 2M

Max Input Current: MAX 80A

Fitments: H4/9003 conversions, H6024 and 6014 headlights

Package Includes: 1 x set of headlight relay wiring harness with high heat ceramic plugs

H4 Wiring Harness

7x6 Led Headlights

Please refer to the user manual in the package

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

H4 Relay Harness

Looking for specific info?

Customer reviews

4.5 out of 5 stars
4.5 out of 5
1,776 global ratings

Customers say

Customers like the ease of installation of the adapter. For example, they mention it's simple and straightforward with excellent directions. They appreciate the performance, brightness, and value of the product. That said, some complain about the wiring and fit.

AI-generated from the text of customer reviews

132 customers mention125 positive7 negative

Customers find the installation of the relay adapter simple and straightforward. They appreciate the excellent directions and mention that it's all plug and play with no cutting or splicing.

"...a novice DIY project, trust me, this is as simple and straightforward as the reviews indicate. Last comment, terminate your grounds correctly...." Read more

"...Installation was pretty straightforward and my headlights are SOOO much brighter now. I'm so glad I did this update to my wiring." Read more

"...They were much easier to install than I thought.." Read more

"Very simple easy to follow installation of this adapter" Read more

124 customers mention87 positive37 negative

Customers like the performance of the relay. They mention that it works great, their new LED headlights work perfectly, and the low switch works correctly.

"This wire harness worked great on my 88 Honda Accord. The lights are working excellently." Read more

"...Kinda flimsy, but once installed seems to work pretty well. Despite those shortcomings, this sure beat a $1,300 TIPM!" Read more

"...headlights high/low beams through a factory wiring harness which is underpowered. The factory wiring harness is also the culprit of your dim lights...." Read more

"...After it was installed it works good." Read more

78 customers mention72 positive6 negative

Customers are satisfied with the quality of the relay. They mention that it's well constructed, and holds up well. Some appreciate the simplicity of the set and the ability to solve problems with LED upgrades.

"...As an electrician by trade, I was impressed with the overall product quality. The crimps were strong and secure...." Read more

"...This relay was a relatively easy install and well made product...." Read more

"The harness overall seems to be made of pretty well other than the plugs... they don't plug in all the way if that makes sense?..." Read more

"Decent quality with heavy gauge wire. These drop right in to a Porsche 944, surprisingly everything was the correct length, no modifications needed ...." Read more

43 customers mention31 positive12 negative

Customers like the brightness of the product. They mention that it takes care of all the lighting problems they were having, and is a nice set of lights. Some say that the instructions for installation are good, and the product is good value.

"...Results: Noticeably brighter OEM headlights...." Read more

"...seems like it will hold up okay.. with that being said my headlights are way brighter so I'm happy about that LOL if I do have any issues in the..." Read more

"...It made my stock headlights quite a bit brighter. Is stall was easy and had plenty of wire. Installed on a 2001 jeep xj." Read more

"...This puts a lot of power through the switch and causes dimming of the headlights. This relay was a relatively easy install and well made product...." Read more

27 customers mention27 positive0 negative

Customers appreciate the value of the relay. They mention that it's well worth the cost, easy to install, and works perfectly.

"...They were actually CHEAPER than just replacing the OEM headlight assembly. Super easy install...." Read more

"...Well worth the cost! And easy fit!" Read more

"Price was excellent and super simple to use and install , well built harness" Read more

"...Great value." Read more

17 customers mention12 positive5 negative

Customers like the wire gauge of the relay. They mention that the length of all the wires were on point, the wiring looked to be decent gauge, and considering LEDs draw little power these will be fine. They also say that the wiring harness took care of all headaches and was totally plug and play. Customers also appreciate the well laid out cable arrangement and the thick insulation.

"...These drop right in to a Porsche 944, surprisingly everything was the correct length, no modifications needed ...." Read more

"...The length was fine for the headlights but baaaaarely reached the battery...." Read more

"...A Lot of fuss about the wire gauge being chincy...." Read more

"...Is stall was easy and had plenty of wire. Installed on a 2001 jeep xj." Read more

16 customers mention11 positive5 negative

Customers are mixed about the fit of the relay. Some mention it's a perfect fit, while others say it was a tad bit small for their very wide vehicle.

"...Well worth the cost! And easy fit!" Read more

"Fits good in a 1990 Jeep Wrangler YJ" Read more

"...It was a very tight fit into the passenger headlight/battery area, but it did fit after 30 minutes of swearing or so. Lamp connectors are ceramic...." Read more

"Excellent fitment and hooked right up to my new LED headlight assemblies on my 1995 Tacoma V6...." Read more

23 customers mention0 positive23 negative

Customers are dissatisfied with the wiring of the relay. For example, they mention that it breaks easily, the connectors melt, and the inline fuse falls apart. Some say that the stranded wire is not suitable to handle the 30 amp fuse. Some customers also report that the low beam cable malfunctions.

"...First a relay popped and my high beams wouldn’t work, no problem, grabbed a relay and fixed it...." Read more

"Working great, after a year on my off road rig the inline fuse is falling apart so I have to wiggle the wire on the inline fuse to get the lights to..." Read more

"It only last me year an a half . Low beam cable malfunctioning. Only have high beams. Relays are ok" Read more

"I did install 90/100 lights on my 4runner and the light connector melted. Probably my fault as the harness looked nice." Read more

Much brighter headlights and better on the switch.
5 Stars
Much brighter headlights and better on the switch.
My 1992 VW did not come with proper headlight relays. This puts a lot of power through the switch and causes dimming of the headlights. This relay was a relatively easy install and well made product. I did extend the ground from the other side over to the main ground and connected to the battery directly. Installation was pretty straightforward and my headlights are SOOO much brighter now. I'm so glad I did this update to my wiring.
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Top reviews from the United States

Bmbottor
5.0 out of 5 stars Simple. Effective. Amazing.
Reviewed in the United States on September 6, 2020
Verified Purchase
Vehicle: 1996 Jeep Cherokee Classic

Overview: My headlight switch failed because it provides power to the headlights high/low beams through a factory wiring harness which is underpowered. The factory wiring harness is also the culprit of your dim lights. In my case, the headlight switch burnt up leaving me with no lights.

Solution: I replaced the faulty switch and decided to upgrade to the H4 wiring harness. The H4 harness re-routes power to the headlights from the switch to the battery making the lights much brighter and removing the electrical load from the switch (while the switch no longer powers the headlights it will still function as your headlight switch.)

Installation notes: The H4 wiring harness is truly plug-and-play. The only additional components I used were self-tapping screws, a piece of sandpaper for cleaning up the locations where I terminated my grounds, standard electrical tape, and a few extra cable ties. The overall length of the harness was plenty long for me. There wasn’t a whole lot of extra space to mount the relays next to the battery but it was doable. Had I simply taken 5 minutes to remove the battery it would have been a breeze. Total install time was about 90 minutes.

Results: Noticeably brighter OEM headlights. Happy headlight switch and your vehicle will be ready for H4 aftermarket LED headlights (which you’re going to eventually do anyway right?)

The harness itself comes with an in-line 30-amp breaker for your battery hookup and 2-80 amp relays. As an electrician by trade, I was impressed with the overall product quality. The crimps were strong and secure. The only thing that concerns me about this entire project would be the fact that the relays are not water-proof which may be an issue for the 4x4 crowd who would much prefer driving through a creek than over it.

Final note: There are great install videos on YouTube if you are new to these things. Even for a novice DIY project, trust me, this is as simple and straightforward as the reviews indicate. Last comment, terminate your grounds correctly. Years of experience as a sparky, it’s not the harness that’s not working it’s because you didn’t land your grounds right.
5 people found this helpful
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Stacey Carrera
5.0 out of 5 stars Much brighter headlights and better on the switch.
Reviewed in the United States on February 27, 2024
Verified Purchase
My 1992 VW did not come with proper headlight relays. This puts a lot of power through the switch and causes dimming of the headlights. This relay was a relatively easy install and well made product. I did extend the ground from the other side over to the main ground and connected to the battery directly. Installation was pretty straightforward and my headlights are SOOO much brighter now. I'm so glad I did this update to my wiring.
Customer image
Stacey Carrera
5.0 out of 5 stars Much brighter headlights and better on the switch.
Reviewed in the United States on February 27, 2024
My 1992 VW did not come with proper headlight relays. This puts a lot of power through the switch and causes dimming of the headlights. This relay was a relatively easy install and well made product. I did extend the ground from the other side over to the main ground and connected to the battery directly. Installation was pretty straightforward and my headlights are SOOO much brighter now. I'm so glad I did this update to my wiring.
Images in this review
Customer image
Customer image
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Chris Garrett
5.0 out of 5 stars Didn’t really need them
Reviewed in the United States on April 23, 2024
Verified Purchase
Bought these to go with my new headlights on my jeep and found out I didn’t need them. They were much easier to install than I thought..
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Big C
4.0 out of 5 stars pretty good overall
Reviewed in the United States on November 15, 2023
Verified Purchase
The harness overall seems to be made of pretty well other than the plugs... they don't plug in all the way if that makes sense? What I mean is the male and of the headlight doesn't seat all the way into the aftermarket harness but I haven't had an issue and seems like it will hold up okay.. with that being said my headlights are way brighter so I'm happy about that LOL if I do have any issues in the future I will update this review
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Clinton Warnock
5.0 out of 5 stars Wiring harness
Reviewed in the United States on April 15, 2024
Verified Purchase
This wire harness worked great on my 88 Honda Accord. The lights are working excellently.
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Kirk
5.0 out of 5 stars Easy install
Reviewed in the United States on February 26, 2024
Verified Purchase
Very simple easy to follow installation of this adapter
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Gun951
5.0 out of 5 stars Drop in install for Porsche 944
Reviewed in the United States on March 19, 2024
Verified Purchase
Decent quality with heavy gauge wire. These drop right in to a Porsche 944, surprisingly everything was the correct length, no modifications needed . Awesome upgrade to a 40 year old harness. I can see in the dark again!!!!
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R. Weiler
3.0 out of 5 stars Does what it's supposed to do. Two different connectors broke during installation.
Reviewed in the United States on March 21, 2024
Verified Purchase
My 2011 Dodge Grand Caravan had the left low beam headlight go out. Diagnosis revealed that it was a fault with the TIPM (the most ridiculous design ever). After months of trying to determine the best route to fix this without replacing a $1,300 part, or take a chance on other things being wrong with a salvage part, this was the way to go. Was able to take the connector from my good headlight and wire it into this harness and then run new wires. As other commented, the run to the passenger side was a little short, but only by 6 inches maybe. I had one of the wires fully fall out of the fuse connector, so I had to disassemble that and reconnect the wire. In addition, one of the blades on a ground wire broke off just by tightening the ground. Kinda flimsy, but once installed seems to work pretty well. Despite those shortcomings, this sure beat a $1,300 TIPM!
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Top reviews from other countries

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Alex. S.
5.0 out of 5 stars Super easy to install
Reviewed in Canada on April 30, 2024
Verified Purchase
Easy install and good product
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Arturo moreno
5.0 out of 5 stars Recomendable
Reviewed in Mexico on April 30, 2024
Verified Purchase
Arregló mi problema de solo luces bajas y voltaje ya que brillan más mis luces led y facilita el manejo de noche.
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Phil
5.0 out of 5 stars Easy order/delivery, excellent product
Reviewed in Australia on September 12, 2020
Verified Purchase
After looking on Jeep forums was recommended this product to upgrade poor lighting. Very happy with product, easy to install, plug and play as advertised, fixed problem as advertised.
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keith boxrud
5.0 out of 5 stars All good!
Reviewed in Canada on December 31, 2022
Verified Purchase
Works as it should.
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robert oneill
5.0 out of 5 stars 1
Reviewed in Australia on July 20, 2020
Verified Purchase
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