How do the unused relay/fuse sockets stay waterproof? I only need 3 relays right now but want room for more.

All the seals for the bottom come without any holes, so there is no need to wire the terminals with short pigtails like another answer suggested. You need to actually poke a hole in them to wire it. The holes are already most of the way through, with just a little skin left at the bottom so it's sealed untill you need it. I just pushed a little dowl through the holes I wanted open for wire.

Can i use the fuses in the panel for the same circuit as the relays?

Yes. I used the fuses for the load side of the relays.

Does the kit with harness come pre wired?

Mine did not, but it came with all the clips and everything To go on the wires and then click into it. I used it for my UTV.. It is very nice. The one in the picture that you asking me about. Looks like it is pre-wired and numbered for each Relay.

Can I use one of these as a horn relay, grounding one coil through the steering column with three others supplied current from switches as usual?

A relay is nothing more than a switch with a normally open and a normally closed contact. Yes you can use a relay to energize your horn. The button in the steering column switches ground when you push it. Connect the ground potential coming from the closed horn switch to the relay on terminal 86, connect a constant 30 amp potential12V source to both 85 & 30 and connect 87 to the positive side of the horn. The horn must be grounded to function. When you push the horn button the circuit to the relay coil will close, switching it to energize the horn.

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TRUE MODS Auto Waterproof Fuse Box [6 Bosch Relay Holder] [6 ATC/ATO Fuse Holder] Universal 12V Relay Block Box for Vehicles, Marine, Light Equipment

TRUE MODS Auto Waterproof Fuse Box [6 Bosch Relay Holder] [6 ATC/ATO Fuse Holder] Universal 12V Relay Block Box for Vehicles, Marine, Light Equipment

Product ID: 159377611

Details

Connector type
Plug-In
Contact material
Copper
Contact type
Normally Open
Current rating
30 Amps
Mounting type
Surface Mount

💧IP65 waterproof rating

🔋6 relay & fuse slots

🛠️Universal 12V compatibility

AR$168525

Duties & taxes included

In stock

Sold byAmazon ArgentinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power Up Your Ride with Bulletproof Reliability!

MOUNT ANYWHERE SECURELY - Innovative 'Z' shaped brackets provide versatile, rock-solid mounting options for vehicles, marine, and off-road gear.
COMPLETE INSTALLATION KIT - Includes box, brackets, seals, and terminals—everything you need for a hassle-free, professional-grade setup.
BUILT TO BRAVE THE ELEMENTS - IP65-rated waterproof nylon 66 housing ensures your electrical system stays dry and reliable in any terrain.
STREAMLINE YOUR POWER SETUP - Consolidate up to six independent circuits with integrated relay and fuse holders for ultimate wiring clarity.
CONFIDENCE BACKED BY WARRANTY - Industry-leading two-year warranty and top-tier customer support keep your projects worry-free.

The TRUE MODS Auto Waterproof Fuse Box is a rugged, IP65-rated relay and fuse block designed for 12V vehicle, marine, and light equipment applications. Featuring six Bosch-style relay sockets and six ATC/ATO fuse holders, it offers a streamlined, waterproof solution to organize and protect multiple circuits. Constructed from durable nylon 66 with versatile mounting brackets, this kit includes all installation essentials and is backed by a two-year warranty, making it the go-to choice for professionals and enthusiasts who demand dependable electrical performance in any environment.

Specifications

ASIN	B07MR64XK1
Best Sellers Rank	311,008 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,325 in Fuses & Holders
Brand	ONLINE LED STORE
Coil Voltage	12 Volts
Connector Type	Plug-In
Contact Current Rating	6 Amps
Contact Material	Copper
Contact Type	Normally Open
Country Of Origin	China
Current Rating	30 Amps
Customer Reviews	4.6 4.6 out of 5 stars (1,687)
Item Weight	1 Pounds
Manufacturer	ONLINE LED STORE
Manufacturer Part Number	PWR0312
Maximum Switching Voltage	12 Volts
Minimum Switching Voltage	12 Volts (DC)
Model Number	PWR0312
Mounting Type	Surface Mount
Operation Mode	Automatic
Specification Met	IP65
UPC	816165026775
Wattage	480 watts

Reviews

S**R

Decent Quality

Decent quality. It's really intended to be mounted in a panel - though they do supply some little legs it can stand on. In combination with some good quality (E.g. Bosch) relays, this is a good option for automotive / marine use.

5.04.2025

S**Y

Great quality and great price

Quite impressed by the quality of this Vs the price. Was used in drag race car that didn't need the factory wire harness, and used this relay box to run fuel pumps, solenoids and fans. So far it's faultless, will be using these for future projects for sure.

26.04.2025

Q**E

Great product and very affordable!

This has been a great addition to my 1997 Tahoe project as an "aftermarket add-ons" relay housing. So far, I've used 3 relay slots for upgrading my upgraded side mirrors to turn the built-in turn signals into turn signal/running lights and 2 relay slots for the door lock actuator polarity swap in the aftermarket remote starter. There's one slot left with no immediate plans and I haven't used any fuse slots yet but I'm sure I'll come up with something lol. Overall, this is a great, easy to use product and it looks right at home in my truck. 10/10 would recommend to any intermediate to advanced DIY guy! Side note: It does come with additional terminal connectors but it still pays to plan all your wiring configurations ahead of time. My "shoot from the hip" method wound up costing me a few of them...

25.12.2020

D**.

Waterproof tested

Good to use and mount

28.04.2023

S**L

Bien content de mon achat

Jai installer cette boîte dans mon bateau pour faire fonctionner quelques circuits, je suis très satisfait, bonne qualité et pas de pièces manquantes, peut-être difficile pour certaines personne sans expérience dans le domaine électricité d'auto.

10.11.2020

J**N

Looks good, works well

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.

4.01.2020

P**F

Really nice, requires serious skills

Awesome product, very well built and very nice finish. It comes with a very nice installation hardware. However it does take some serious technical knowledge to install, but that is obvious since you know you will have to run a bunch of different wires through the unit so i would advise you to take to a specialist to get the job done, or just take a weekend to set it up propperly if you are capable, it is fun enough. I installed it on a Toyota LandCruiser 80 Series, made a custom frame for the base and it works like a charm, looks originallish i guess, deffinitely better that it was before. Would totally buy again.

11.11.2019

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TrustScore 4.5 | 7,300+ reviews

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