True Mods Waterproof 12V Fuse Relay Box Block Kit w/Pre-Wired Harness [12 & 16AWG] 6 Gang Bosch Style 5Pin 30A/40A Universal Relay & Fuse Panel for DC Auto Automotive Vehicle Car Marine Boat Jeep UTV
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Availability:
In Stock.
Arrives
Thursday, May 28
Style: Prewired Fuse/Relay Kit
Features
- REMAP YOUR WIRING -Use this 12V automotive fuse relay box with 12 AWG / 16 AWG prewired long pigtail wiring harness as your waterproof power distribution block solution. Organize, consolidate, and keep track of multiple independent electric circuits with six 5pin relay sockets and six fuse holders.
- MULTI-TRERRAIN - Our unique universal-fit "Z" shaped brackets make it possible to securely mount this 12 volt DC waterproof fuse relay block just about anywhere under hood for your automotive.
- BUILT LIKE A TANK - Made from durable and dependable nylon 66 and sporting an IP65 waterproof rating, our weatherproof 6 gang fuse relay box doesn't understand the word "can't".
- COMBINE TO CONQUER - The road ahead just got a bit easier. This top-notch auto fuse relay box kit includes 6 slots for Bosch-style 5-pin relays, 10 fuses, a 6-wire-to-1 terminal ring, wire connectors, terminals, and silicon seals - all for the ultimate level of convenience.
- NEXT LEVEL UPGRADE - With neatly color-coded labels on wires to ensure easy installation, our pre-wired relay box harness features 6 gang independent inputs with robust 12 AWG power wires to unleash the full potential of the included 5pin 30amp / 40amp relays.
Connector Type: Solder
Contact Material: Silver
Contact Type: Normally Closed
Current Rating: 40 Amps
Mounting Type: Panel Mount
Connector Type: Solder
Contact Type: Normally Closed
Current Rating: 40 Amps
Mounting Type: Panel Mount
Operation Mode: Automatic
Wattage: 144 watts
Coil Voltage: 12 Volts
Contact Current Rating: 40 Amps
Maximum Switching Current: 40 Amps
Maximum Switching Voltage: 12 Volts (DC)
Minimum Switching Voltage: 12 Volts
Upper Temperature Rating: 85 Degrees Celsius
Brand Name: ONLINE LED STORE
UPC: 810097591295
Part Number: EPSPWR0314
Manufacturer: TRUE MODS
Specification Met: IEC/EN 60947
Contact Material: Silver
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, May 28
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Prewired Fuse/Relay Kit
Easy functionality and fit, used in my race car setup for standalone fuse box
Reviewed in the United States on January 30, 2026 by Josi
Style: Prewired Fuse/Relay Kit
Very nice items.
Reviewed in the United States on February 12, 2026 by DS Darvin
Style: Fuse/Relay Kit
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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Reviewed in the United States on June 16, 2023 by jesse jesse
Style: Box Only
I used this to build a new fuse box for a 1967 Ford dump truck. Very good build quality on the box and some of the details like including extra crimp connectors and seals was very nice for if I messed up. The crimp connectors are nice and solid when using the crimping tool - I still soldered the connections after crimping but it felt solid enough that I probably didn't have to. As well the seals install nice and tight into the holes, although I'm a little concerned about the waterproofing of the 16ga wires, there seems to be a little bit of movement that isn't present in the 14ga and larger wires. It should be good enough though, I'm not planning on using the truck as a boat after all! To the downsides, the lid of the box is a little challenging to get off - I get why they have extra clips for a good top seal, but it is hard to push both on one side in to release the lid. As well it would be nice if there was a back case or cover to keep the wires contained - I'm going to try 3d printing one to make sure the wires don't ever rub against the cab wall or get out enough to get snagged. Final notes: Plan your fusebox before stripping your first wire and have the proper crimp tool. I had a full plan, including what every single spot in the fusebox connected to, and it made wiring it a breeze. Also, a label maker to print cable tags is a huge headache preventer if you don't have enough wire colors for each circuit to have a different color.
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Reviewed in the United States on November 16, 2022 by Matthew E.
Style: Fuse/Relay Kit
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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Reviewed in the United States on January 4, 2021 by TexasTornadoes TexasTornadoes
Style: Prewired Fuse/Relay Kit
Well built works great all the hard work done already
Reviewed in the United States on February 22, 2026 by Tim crigger
Style: Fuse/Relay Kit
Tight quarters to wire compactly, but can be done.
Reviewed in the United States on January 31, 2026 by winfred l holloway
Style: Fuse/Relay Kit
Good setup .... strong box... nice lay out. BUT cover latches are easily broken and the electrical connectors are total trash. To soft and don't stay in the slots or crimp very well
Reviewed in the United States on December 10, 2025 by Robert