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True Mods 12V DC Auto Waterproof Fuse 5-Pin Relay Box Block [6 Bosch Style Relay Holder] [6 ATC/ATO Fusible Holder] Universal Relay Block Box for Automotive Vehicles Cars Marine Boat Light Equipment

4.5 4.5 out of 5 stars 3,044 ratings

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Box Only

Purchase options and add-ons

Connector Type Solder
Contact Type Spdt
Current Rating 20 Amps, 25 Amps, 30 Amps, 10 Amps
Mounting Type Boat Mount
Brand ONLINE LED STORE

About this item

  • REMAP YOUR WIRING - organize, consolidate, and keep track of multiple independent circuits with six relay sockets and six fuse holders.
  • MULTI-TRERRAIN - Our unique "Z" shaped brackets make it possible to securely mount this waterproof relay box just about anywhere.
  • BUILT LIKE A TANK - Made from durable and dependable nylon 66 and sporting an IP65 waterproof rating, our relay box dosent understand the word "can't."
  • A COMPLETE KIT - Box, brackets, seals, terminals, we've included everything you will need to sucessfully install your new waterproof relay box.
  • MORE THAN A WARRANTY - We've got you covered with an industry leading two-year warranty and the best customer support in the business.

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Product details

  • Product Dimensions ‏ : ‎ 7.13 x 4.13 x 3.63 inches; 1 Pounds
  • Date First Available ‏ : ‎ January 1, 2024
  • Manufacturer ‏ : ‎ ONLINE LED STORE
  • ASIN ‏ : ‎ B07MR64XK1
  • Customer Reviews:
    4.5 4.5 out of 5 stars 3,044 ratings

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From the brand


Product Description

Waterproof relay/fuse block banner
close up relay block

Making Your Adventures Possible

Your 100 miles into a multi-day off-road expedition, the sun is going down, and the last thing you want to worry about is whether or not your lights will turn on when you flip the switch. But if you’ve trusted your fuses and relays to a waterproof relay box from us, you know you have nothing to worry about. Made from the same durable, heat-resistant nylon 66 used in parachutes and engine components; and packed with enough silicone gaskets and seals to give it an IP65 waterproof rating, this relay box is fully prepared for any contingency.

Top view relay/fuse block

Get Lost, Just Not in Your Wiring

Trying to organize harnesses, fuses, and relays can quickly have you driving in circles. Get your bearings with a dedicated, waterproof relay box. Like a trail map for your wiring, our relay box is the most efficient way to consolidate, organize, and keep track of all your aftermarket accessories. Boasting a six relay/fuse capacity, this relay box is more than capable of powering and protecting up to six independent circuits.

Bracket system banner

Tackle Anything

When it comes to installing and using your new relay box, we don't leave you hanging. Our unique 4 bracket system easily adjusts to fit any vehicle or situation, and with all the terminals and seals included in the kit, you're sure to get a reliable and waterproof connection every time.

Size Chart

What's Included:

  • (1) Waterproof Fuse Relay Box
  • (1) Pack of Relay Rubber Pads
  • (1) Pack of Fuse Rubber Pads
  • (1) Pack of Relay Wire Terminals
  • (1) Pack of Fuse Wire Terminals
  • (1) Pack of Brackets and Fasteners
  • (1) Rubber Gasket
  • (1) Waterproof Ring
  • (1) Instruction Manual

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
3,044 global ratings

Customers say

Customers like the appearance of the relay, mentioning it has a very nice design. They appreciate the value, water resistance, and quality of the product. That said, some complain about the durability, saying that the locking tabs broke upon disassembly. Opinions are mixed on installation, fit, and ease of installation.

AI-generated from the text of customer reviews

193 customers mention165 positive28 negative

Customers like the quality of the relay. They say it's well-made, sturdy, and solid. The crimp connectors are nice and solid, and the rubber seals are heavy duty rubber of higher quality than you'd get with typical name. Overall, customers are happy with the quality and functionality of the product.

"...From the actual box to the wiring, it is a very heavy duty product...." Read more

"...The kicker is that this is a really well-made kit that is a great value given that it includes everything except the actual wire...." Read more

"...The feel and overall look is solid.I purchased the kit to work in tandem with a Painless Performance vehicle rewire kit...." Read more

"...I'm just really impressed, excellent result and one of those rare purchases where I feel like I got more than I paid for." Read more

69 customers mention61 positive8 negative

Customers generally like the value of the relay. They say it's excellent for the price, and has good quality for the money. Some mention that it filled the bill perfectly on their 68 Bronco.

"...This kit was not only significantly cheaper, but it also makes more logistical sense than most other platforms that give you more fused circuits..." Read more

"This relay box is amazing. The kit version is still cheap in price, but comes with every connection and additional replacement parts...." Read more

"Overall it’s a nice box and it’s worth the money...." Read more

"...came with our relays but even without the crimp connections it is worth the money by far." Read more

46 customers mention43 positive3 negative

Customers like the appearance of the relay box. They mention it has a very nice design, is well built, and has frickin' nice finish. The product is also well thought out and will make your wiring project look professional.

"...Looks OEM." Read more

"...This thing is MUCH nicer than I expected!..." Read more

"...that they all broke the first time it was opened... otherwise a very nice design." Read more

"...Everything fits together as it should, appears to be well made and designed." Read more

35 customers mention30 positive5 negative

Customers like the water resistance of the relay. They mention that it has sturdy construction, a water proof connection gasket, and a nice water tight system.

"...Weather proof and well made...." Read more

"THe product may very well waterproof and if you are able to install all the pieces it will surely clean up any mess under the hood...." Read more

"...Green top o-ring and bottom plugs/gaskets should provide a pretty good weather proofing/water resistance...." Read more

"Going to be a nice water tight system to run some relaysBe very careful when you open the lid..." Read more

65 customers mention39 positive26 negative

Customers are mixed about the ease of installation of the relay. Some mention that it's easy to setup to your own spec of wiring and fused, while others say that it takes some serious technical knowledge to install. The pins are easy to use and crimp and lock in with a satisfying click when they're inserted. However, some say it takes several hours to do and that the silicon seals are difficult to install when using larger guage wires. Overall, the product is a great choice for those looking for a high-quality, easy-to-use relay.

"...of running excess current to a large switch panel, but it also simplifies the wiring and allows for easier future upgrades in the event you decide..." Read more

"...The wiring does take some time to layout and fit to the desired application.Overall I'm pleased with the quality of the products." Read more

"...Like others have said, and it goes with any wiring, take your time for a professional look." Read more

"...Takes a while to assemble it all together but nothing is hard to do. Everything fits together as it should, appears to be well made and designed." Read more

38 customers mention25 positive13 negative

Customers are mixed about the installation of the relay. Some mention that it comes with everything they need, while others say that it didn't include wires, relays, and fuses. The product comes with extra parts, rubber seal plugs, a couple extra terminals, as well as the necessary connectors. However, some customers say that the connectors are very cheap and pull off the wire very easily, while the kit didn' t include relay terminals. The connectors also aren't sturdy and will not endure vibrations.

"...well-made kit that is a great value given that it includes everything except the actual wire...." Read more

"...The connectors are very cheap and pull off the wire very easily. I soldered them in place. They also pull out of the box easy...." Read more

"So this is a neat little package that comes with all the parts...." Read more

"The fuse box is nice it comes with everything you need except wire but it’s a kind of pain to open without a flathead screwdriver" Read more

34 customers mention23 positive11 negative

Customers are mixed about the fit of the relay. Some mention that the legs are movable so they can fit it in tight places, while others say that the tabs on the box are too big. The small size and the small size of the box make it easy to fit in tight spaces. However, the unit starts to get really big with one buss box and is not compact by any means. The terminals are good quality and fit standard Bosch relays without issue.

"...All the weather proof plugs fit really tight and if you are careful to only punch out enough of the hole for the gauge of wire you are using this..." Read more

"...Everything fits together as it should, appears to be well made and designed." Read more

"...The fuses are super cheap and flimsy. I probably will not use them since they are just normal automotive fuses...." Read more

"...These seals are then pressed into the back of the block giving a very tight and for all purposes waterproof seal...." Read more

35 customers mention0 positive35 negative

Customers are dissatisfied with the durability of the relay. They mention that the locking tabs broke upon disassembly, the cover broke off the first time they put it on, and the latches broke shortly after installation. The clips are fragile and break almost immediately.

"One of the lock tabs for the cover broke while trying to open the lid...." Read more

"...but on the relays, the connector won’t crimp good and Eve wire pulls out...." Read more

"...No biggie. Tried to bend it ever so slightly and it broke off. Now I have to Super glue it in place, I guess?" Read more

"...A tab broke off the cover the first time I put it on. One of the retaining tabs in one of the fuse terminal ports also broke." Read more

Worked great.
5 Stars
Worked great.
Adding high current 12v accessories is a plug and play ordeal now on my twcoma thanks to this little relay box. Looks OEM.
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Top reviews from the United States

Reviewed in the United States on March 9, 2024
Size: Kit w/ HarnessVerified Purchase
Reviewed in the United States on January 4, 2021
Customer image
5.0 out of 5 stars Time consuming, but probably the best platform available to build a custom power distribution module
Reviewed in the United States on January 4, 2021
I looked at a lot of different platforms, including the Bussman RTR setups. This kit was not only significantly cheaper, but it also makes more logistical sense than most other platforms that give you more fused circuits than relays. Not only does an all-relay setup extend the life of your switches and lower the chance of running excess current to a large switch panel, but it also simplifies the wiring and allows for easier future upgrades in the event you decide to change a particular circuit to a higher-draw accessory. If you truly want additional fused circuits without relays, then just get a small fuse block to fill that void. The kicker is that this is a really well-made kit that is a great value given that it includes everything except the actual wire. The only downside is that it does take a significant time investment to assemble it, so if you are looking for a quick setup, this isn't it. If you need a fast setup, then look into premade setups, because all of the off-the-shelf kits are going to require substantial time to complete. The only items you need besides the kit would be a weather pack crimper (~$15) and some wire. I used 16ga for the switch and ground wires and 14ga for the power wires and it fit the seals just fine. Some heat shrink will help ensure your connections remain good for the life of your setup.
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62 people found this helpful
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Reviewed in the United States on January 15, 2024
Size: Kit w/ HarnessVerified Purchase
One person found this helpful
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Reviewed in the United States on May 19, 2022
Size: Box OnlyVerified Purchase
6 people found this helpful
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Reviewed in the United States on March 1, 2024
Size: Kit w/ HarnessVerified Purchase
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5.0 out of 5 stars Worked great.
Reviewed in the United States on March 1, 2024
Adding high current 12v accessories is a plug and play ordeal now on my twcoma thanks to this little relay box. Looks OEM.
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One person found this helpful
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Reviewed in the United States on June 16, 2023
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5.0 out of 5 stars 1967 f100 relay upgrade
Reviewed in the United States on June 16, 2023
I bought this to upgrade a Ford f100. I am in the process of adding relays for a dual electric fan setup and headlight relays. Right now I only will be using 4 out of the 6 available fuses and relays. I was a little worried when I read the review by someone saying that they had a hundred dollar crimper and something called f dies that they couldn't get to crimp the terminals properly. I decided to risk it and try it anyway. I have a crimper I bought on sale for 9.99 at my local big box store (the crimper in the photo). After drawing out my wiring diagram I crimped one as a test and could not pull it apart, no matter how hard I tried. I guess $10 crimpers must be better than the $100 version with seperate dies. I did buy the kit instead of just the box because I was unsure if the box only version would come with the seals. The fuses are super cheap and flimsy. I probably will not use them since they are just normal automotive fuses. The relays seem ok, I will use them if they work. I plan on adding a few more pictures once I get everything installed. I do not like the metal mounting brackets so made a flush mount spacer for the wiring out of some expanded PVC and a CNC router. But that was just because of aesthetics, I'm sure sure the included brackets would have worked as intended. A few reviews mentioned the cover breaking, I put it on and took it off a few times and haven't had any problems, so fingers crossed I won't have the same issues. Overall I think this is going to be a great upgrade to an old truck that didn't use relays for anything.

Update: I do intend on adding a few more pictures of the completed installation, unfortunately I ran out of warm weather and now the old truck is tucked safely away in the barn until spring. Once it warms up I will post more pictures. But I am still completely impressed with the relay block, from my original post in June until the weather turned ugly in December I have had no problems with anything I wired through the block.
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4 people found this helpful
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Reviewed in the United States on December 4, 2023
Size: Box OnlyVerified Purchase
One person found this helpful
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Reviewed in the United States on January 14, 2024
Size: Kit w/ HarnessVerified Purchase
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5.0 out of 5 stars Pre wired 5- pin relay block kit
Reviewed in the United States on January 14, 2024
I used this relay block and the distribution block on my excavator for additional circuits and
LED work lights and light bar.Due to space constraints spacers were added to lift the relay box and the distribution block so the wiring could be tucked underneath neatly and out of the way.The wiring does take some time to layout and fit to the desired application.Overall I'm pleased with the quality of the products.
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2 people found this helpful
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Top reviews from other countries

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Sandman-Collectibles
5.0 out of 5 stars Quick ship & quality product.
Reviewed in Canada on February 22, 2023
Luis Montes
4.0 out of 5 stars buena opción
Reviewed in Mexico on October 31, 2022
Justin Nicholson
5.0 out of 5 stars Looks good, works well
Reviewed in Canada on January 4, 2020
Size: Box OnlyVerified Purchase
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Justin Nicholson
5.0 out of 5 stars Looks good, works well
Reviewed in Canada on January 4, 2020
Just installed it into a piece of equipment we built. Looks great and should hold up to water and prevent corrosion. Will update if I find otherwise.
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Daniel R.
5.0 out of 5 stars Waterproof tested
Reviewed in Australia on April 28, 2023
Size: Box OnlyVerified Purchase
Shirley Young
5.0 out of 5 stars Good product
Reviewed in Canada on June 27, 2021
One person found this helpful
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