SKU: 43530737871

2pcs Polarity Conversion Relay 12 V H4

Sale price$11.49 Regular price$12.77
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Description

2pcs Polarity Conversion Relay 12 V H4Description: Some old vehicles are negative control vehicles. The standard HID headlights are positive control, but when connected to negative control vehicles, you may encounter the following problems: 1. Headlight does not light up correctly and cannot be switched between Hi Lo and Hi Lo switching delays. This HID polarity conversion relay can solve these problems, so you can work your headlights normally. 2. H4 Hi Low Switch HID Kit for Phillips

Description:
Some old vehicles are negative control vehicles. The standard HID headlights are positive control, but when connected to negative control vehicles, you may encounter the following problems:
1.Headlight does not light up correctly and cannot be switched between Hi/Lo and Hi/Lo switching delays.
This HID polarity conversion relay can solve these problems, so you can work your headlights normally.
2. H4 Hi Low Switch HID Kit for Phillips Control is useful when installing negative control vehicles.The polarity conversion relay is inserted directly and the negative is positive, positive is negative, easy to use.
3. When the HID headlights start up high voltage, and the high voltage will affect the in-car circuit. This HID polarity conversion relay makes the current more stable and protective device, so it is recommended to install this relay.
4, If you find that there are problems with your newly installed headlights, please make sure that the cause is not the headlight body or due to polarity issues, this polarity conversion relay is the choice to solve polarity problems when replacing HID headlights.

Specification
For 12 V only.
H4Hi/Lo Headlight for Car
Compatible with HID ballasts 35W to 75W
Compatible with LED headlight bulbs
Relay body is completely waterproof.

Fitment:
Applicable Vehicles: 12V car suitable for all negative control vehicles with 4 connectors. Headlight (H4 Hi/Lo Switchable) HID / LED Car / Motorcycle / Truck (For Jimney SJ30,SJ40,JA51,JA71,JA11,JB31,JA12,JA22/Mighty Boy/Fronte) Most domestic cars (signal control of most Toyota vehicles is negative)

Package included:
2 X H4 Negative Polarity Conversion Relay
(show as pictures )
[* Instruction is not included!]

Note:
1.Please check the description or use the year/make/model check finder and replace part numbers to confirm the compatibility before purchasing.
2.Professional installation is recommended.


Warranty:
Returns: Customers have the right to apply for a return within 60 days after the receipt of the product
24-Hour Expert Online: Solve your installation and product problems

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43530737871

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4.2 ★★★★★
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KCrowley
Alexandria, US
★★★★★ 4
Smooth!
Color: Brown, Size: Mid Back, Color: Brown, Size: Mid Back
Good value and looks pretty good. Faux leather feels like Naugahyde. Should be durable since that's what boat seat are made of. Could use a bit more lumbar support, but overall quite comfortable. Wider than I expected (so it must be designed for us Americans.) Casters are fantastic. Far superior to traditional plastic casters. Because these are made of rubber, they are dead quiet and smoooooth rolling across the flooring. Took about 30 minutes to assemble. Lots of parts but the pictorial instructions were clear. I'd give it five stars, but I wish it had a bit more height adjustment. We'll see how it holds up, but so far I'm pretty pleased.
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Reviewed in the United States on December 29, 2025
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Buman
Omaha, US
★★★★★ 5
Very pleased with my purchase
Color: Brown, Size: Mid Back
Easy to put together - instructions are good - excellent quality and the chair is comfortable. Far from being flimsy it's a heavy chair which rolls perfectly as needed. You won't find that many good chairs (if any!) at this excellent price. As always the ultimate question is: would I buy it again? The answer is YES, definitively. Great purchase.
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Reviewed in the United States on May 23, 2026
C
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Craig
Fort Morgan, US
★★★★★ 5
superb, worth 2x the pricez
Color: Brown, Size: High Back
While this may appear to be an average run of the mill copycat sort of generic office chair, it's actually very comfortable with perfect lumbar support. Looks great, and the leather (or leather equivalent) feels durable. This sucker will last me in my WFH setup for years I do not doubt. Save yourself a few hundred bucks getting this versus some "premium" office chair... I doubt you'll notice much if any difference.
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Reviewed in the United States on May 5, 2026
L
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Lana M.
Grantham, US
★★★★★ 5
22 year old gamer approved.
Color: Black, Size: Mid Back
So far so good!! I bought this chair for my gamer son, he sat the springs out of his last one, so this one making it this long has me very pleased. It was easy to put together, and the quality is pretty notable, especially the wheels, super smooth rolling. It was definitely worth what we paid for it, and he finds it very comfortable, providing plenty of back support, and a stable seat for hours of gaming.
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Reviewed in the United States on May 10, 2026
S
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Sam H
New York, US
★★★★★ 3
The back of the chair is not supportive
Color: Brown, Size: Mid Back
Really nice casters that truly roll quietly. The faux leather is stitched well and sturdy. The only problem i have is that the back is not adjustable and gives 0 back support. The whole back of the chair is hollow inside so your lumbar gets no help. The seat is comfy but super wide like a lot of other reviews mentioned
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Reviewed in the United States on February 22, 2026

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