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The 8 Best automotive fog light relays of 2025

Are you trying to find automotive fog light relays among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling automotive fog light relays on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 18 hours of research and did 74 automotive fog light relays tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best automotive fog light relays you can buy today

SaleNo. 1
Nilight 16AWG Fog Light Wiring Harness Kit 12V Heavy Duty 5PIN Rocker Switch Relay Blade Fuse Lights Socket Connector Compatible with H11 H9 H8 886 889 892 PGJ13 Bulbs
  • Application: This Wiring harness is designed for fog lights. The socket connector is compatible with H11 H9 H8 886 889 892 PG13 PGJ13 880 889 862 881 884 885 894 898 899 Fog light bulbs. The wiring harness kit can be connected to the light source within 180W. If your power supply is 24V, please replace the original 12 V relay with a 24V relay.
  • 5 Pin Rocker Switch: Nilight 5 pin on-off rocker switch with SPST design (single pole single Throw), simple installation, freely turn on or off the light. Built-in two premium LEDs Emits soft light to illuminate the patterns, easy for you to find the switch in the dark.
  • Two Leads Available: 7.2 feet extendable wiring harness, two sets of light output connectors for dual light fixtures less than 180W.
  • Circuit protection: Power relay for safety protection and conversion circuit. Blade fuse protects the circuit when over-current or short circuit occurs. Its load capacity is up to 180W and comes with two extra fuses.
  • Package includes: 1 x fog light wiring harness kit and extra blade fuses. A wiring diagram.
No. 2
iJDMTOY 5pc 12V 30A/40A 5-Pin SPDT Relay Socket Wire Compatible with Car Fog Lights, LED Light Bars, Aftermarket Fogs, Daylight DRLs
  • Includes 5 pieces of 5-pin SPDT relay module boxes with pigtails for reliable and efficient electrical connections
  • The pre-wired SPDT 5-pin electrical relay unit, complete with 5-wire lead pigtail, rated at 12V DC with a maximum of 30-40AMP, is ideal for most heavy duty electronic devices, light applications between 9-16V DC, with a wattage not exceeding 160W
  • Relay controller box is measured at 1.65" x 1.25" x 1.25" with aprrox 5" long wiring
  • Perfect for power management, this relay harness is ideal for applications like high wattage horns drawing power directly from the battery to prevent excessive load on the vehicle’s existing wiring system and ensuring safe, easy on/off operation
  • SPDT: Stands for Single-Pole Double-Throw, and has one pole and two throws. It can control one circuit, but it can switch between two different contacts, or redirect the circuit. SPDT switches can also toggle between two different circuits or functions. Depending on the pole's default position, one throw is normally open (NO) and the other is normally closed (NC)
No. 3
iJDMTOY 5-Pin 12V 40A SPDT Relay Socket Wire Compatible with Car Fog Light, Daylight DRL Light, etc
  • Includes one 5-pin SPDT relay module box with pigtails for reliable and efficient electrical connections
  • The pre-wired SPDT 5-pin electrical relay unit, complete with 5-wire lead pigtail, rated at 12V DC with a maximum of 30-40AMP, is ideal for most heavy duty electronic devices, light applications between 9-16V DC, with a wattage not exceeding 160W
  • Relay controller box is measured at 1.65" x 1.25" x 1.25" with aprrox 5" long wiring
  • Perfect for power management, this relay harness is ideal for applications like high wattage horns drawing power directly from the battery to prevent excessive load on the vehicle’s existing wiring system and ensuring safe, easy on/off operation
  • SPDT: Stands for Single-Pole Double-Throw, and has one pole and two throws. It can control one circuit, but it can switch between two different contacts, or redirect the circuit. SPDT switches can also toggle between two different circuits or functions. Depending on the pole's default position, one throw is normally open (NO) and the other is normally closed (NC)
No. 4
HUIQIAODS H11 880 881 H8 Universal 40A Relay Wiring Harness Kit Fits LED Automotive Fog Light Conversion Assemblies
  • Designed to be Compatible with HID Bulbs, A Solution choice for Flickering Bulbs (Each Vehicle Varies)
  • Reliable Relay Harness that Draws Power Straight from Battery
  • Compatibility List: H11, H8, H9, 880, and 881 HID Conversion Kits
  • Increases visibility, and has long lasting non-fading lifetime
  • Used to reinforce fog lights without need for a adapter
No. 5
HUIQIAODS H11 880 881 H9 Fog Light Lamp Wiring Harness Socket Wire Connector with 40A Relay & ON/Off Switch Kits Fit for LED Work Lamp Driving Lights Etc
  • Good For Replacement fog lamps, Add-on fog lights, HID lights, LED daytime running lights, Driving lights, LED work lights, Off-road lighting kit
  • This H11 wiring harness kits included: 12V 40A relay module box, wiring harness w/ adapters, 30A safety fuse box, and 5 Pin LED indicator on/off switch
  • 8.5ft wiring harness: more than 8.5ft of wiring from the switch to lights, also is extendable, run the harness to your desired lighting location.
  • Efficient Protection: Power relay and inline blade fuse act as the first line of defense against overcurrent and short circuit
  • Pack include : 1 x fog light wire harness kit (fog light is NOT included)
No. 6
Double Color/High Low Beam Wiring Harness Kit with Remote Control DC12V Maximum 300W 40A LED Lights Wiring Harness Switch Relay 14AWG Core Cable Harness for Car Fog Lights Work Driving Lights Bar
  • double color/high low beam wiring harness kit with remote control ,easy to install, easy DIY.the product can be directly connected to the battery to ensure that the power supply line of the original car is not damaged .
  • the products are equipped with relays and high current fuses, which are more safe and reliable. It can be suitable for the light 10W~300W led work light bar.
  • switch, relays and fuse included, the switching relay is rated to 40A, routine use recommend 12A will have a longer lifespan.If you use DC24V power supply, please replace the DC24V relay.
  • professionally assembled wiring loom kit suitable for DC12V HID ,DC12Vhalogen, DC12V LED driving lights,offroad lights bar, offroad spot lights, fog lights, work lights, replacement fog lamps add-on fog lights hid lights etc.
  • Durable: made of high quality copper, silicon infused wire, durable and Waterproof.
  • Best after-sales service: with absolutely nothing to worry about, If there is any problem with our product, please contact us and leave us a message; we will deal with it within 24 hours.
No. 7
YCHOW-TECH Wiring Harness 2 Lead, 12V 40A Rock Switch Relay Fuse Nylon Wiring Harness Kit for LED Light Bars Fog Lights Work Lights Driving Lights Offroad LED Pods Wire Kit for Truck UTV ATV Boat
  • OVERVIEW - The Nylon Wiring Harness Kit is specifically designed to wire and operate up to two 200W auxiliary lights, such as fog lights or LED light bars, with a maximum total power of 400W. This comprehensive kit includes a red indicator light rocker switch, relay, fuse, and all necessary mounting hardware, making it an ideal fog light wiring harness kit or LED light bar wiring harness kit.
  • NYLON MATERIALS - Constructed with a high-tensile nylon jacket, this harness offers superior strength, flexibility, and durability. The nylon material ensures excellent heat dissipation and resistance to daily wear and tear, providing long-lasting performance. The sleek design adds a factory-like appearance, making it a perfect fog light harness for various applications.
  • APPLICATIONS - This versatile fog light wiring harness kit is easy to install and compatible with all vehicles, powersports, boats, and any devices equipped with a 12V power source. It is designed to fit most LED lights on the market, including fog lights and LED light bars. The illuminated red LED indicator ensures visibility and ease of use, while the 14.7ft total cable length provides ample wire to reach the end of your vehicle.
  • SAFETY & DURABILITY - Engineered for safety, this fog light harness is heat-resistant, protecting against over-current and over-temperature conditions. The waterproof design enhances durability, and the 4-pole relay, along with the sealed fuse with a rubber cap, provides added moisture protection. The rocker switch has undergone rigorous testing to ensure long-term reliability, making it a dependable LED light bar wiring harness kit.
  • BOX CONTENTS - The kit includes a 14.7ft 2-lead wiring harness, an on/off rocker switch, a plug-in style 40A relay, an ATO style 30A fuse, heat shrink tubes, and fully insulated male and female connectors. Backed by a 12-MONTH quality assurance, this fog light wiring harness kit comes with a promise of quick response within 24 hours for any inquiries or support.
No. 8
iJDMTOY 9005 9006 9145 H10 Relay Wiring Harness Compatible with Automtive Driving Light, Running/DRL, Fog Light, Retrofit, Off-Road Lighting, etc
  • One relay wiring harness set includes a 4-pin SPST relay module box, in-line safety fuse box, input +/- terminals, single wire input trigger and dual 9006/HB4, 9005/HB3 H10 9145 9140 outputs for reliable and efficient electrical connections
  • The pre-wired SPST 4-pin electrical relay unit, complete with socket and rated at 12V DC with a maximum of 30-40AMP, is ideal for most heavy duty electronic devices, light applications between 9-16V DC, with a wattage not exceeding 160W
  • One single wire inptut trigger, with dual 9006/HB4, 9005/HB3 H10 9145 9140 outputs, good for light applications with socket sizes of 9005 9006 H10 9145 HB3 HB4
  • Perfect for power management, this relay harness is ideal for applications like front fog/driving lights and off-road lightbars, pod lamps drawing power directly from the battery to prevent excessive load on the vehicle’s existing wiring system and ensuring safe, easy on/off operation
  • Installation tips: connect output contacts to up to 2 light applications/devices, attach red/black O-ring/C-ring to battery +/- or ACC/accessory 12V+/ground, connect the signal triggering wire to any 12V power source that use to trigger the on/off operation
No. 9
LED Work Lights Bar Remote Wiring Harness Kit 12V 40A LED Lights Remote Wiring Harness Switch Relay 14AWG Core Cable Harness 2 Leads fit for Car Fog Lights Work Driving Lights Bar
  • Easy to Install: remote wiring harness kit for led bar lights,Easy to install, easy DIY. the product can be directly connected to the battery to ensure that the power supply line of the original car is not damaged.
  • Safe and Reliable: remote wiring harness kit are equipped with relays and high current fuses, which are more safe and reliable. It can be suitable for the light 10W~300W led work light bar. Durable: made of high quality copper, silicon infused wire, durable and waterproof.
  • Longer Lifespan: switch, relays and fuse included, the switching relay is rated to 40A, routine use recommend DC12V will have a longer lifespan. DC24V need to replace the relay.
  • Wide Application: professionally assembled wiring loom kit suitable for 12V HID ,12Vhalogen, 12V LED driving lights,offroad lights bar, offroad spot lights, fog lights, work lights, replacement fog lamps add-on fog lights hid lights etc.
  • Buy With Confidence: With absolutely nothing to worry about, If there is any problem with our product, please contact us and leave us message; 24 hours online service.
SaleNo. 10
iJDMTOY Universal Fit Relay Harness Wire Kit with LED Light ON/Off Switch Compatible with Automtive Driving Light, Fog Light, Off-Road Lighting, etc
  • One relay wiring harness set includes a 4-pin SPST relay module box, in-line safety fuse box, pushbutton switch, input +/- terminals, and dual metal contact outputs for reliable and efficient electrical connections
  • The pre-wired SPST 4-pin electrical relay unit, complete with socket and rated at 12V DC with a maximum of 30-40AMP, is ideal for most heavy duty electronic devices, light applications between 9-16V DC, with a wattage not exceeding 160W
  • Universal fit teardrop shape push button toggle switch with double sided tape on the back, featuring a green/red LED on/off indicator light, easy to install anywhere you need to
  • Perfect for power management, this relay harness is ideal for applications like front fog/driving lights and off-road lightbars, pod lamps drawing power directly from the battery to prevent excessive load on the vehicle’s existing wiring system and ensuring safe, easy on/off operation
  • Installation tips: connect output contacts to up to 2 light applications/devices, attach red/black O-ring/C-ring to battery +/- or ACC/accessory 12V+/ground, route the signal triggering wires into the car interior near dashboard, and connect to the switch

How to choose a good automotive fog light relays

Does the idea of finding a fantastic automotive fog light relays make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in automotive fog light relays. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top automotive fog light relays products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top automotive fog light relays on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top automotive fog light relays brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top automotive fog light relays based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the automotive fog light relays were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good automotive fog light relays, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your automotive fog light relays.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting automotive fog light relays for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our automotive fog light relays. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what automotive fog light relays should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on automotive fog light relays.