8.10-Custom Relay and Fuse Panel

When you add accessories, you need to support those accessories with a proper electrical system for optimum performance and safety. In this video I walk you through the process of designing and constructing a relay and fuse panels to hop up your hot rod.

Below are links to some of the parts I used:

Relay and Fuse Block:

Relay Terminal Connectors:

Bus BArs:

Via Air 40AMP Relay:

[difsid]

omg you're the only one who could make me understand how a relay works thank you

[KSwapTheWorld]

I Am Doing This To My K Swapped 69 C10. This Is Now Saved In My "K-Swap" Album.

[tomkrause]

Save some wire and clutter by jumpering pin 86 to pin 30, and then putting your switch between pin 85 and ground. Saves running a hot wire all the way to your switch and back, while just grounding all your switches to a common spot under the dash. Most modern automotive wiring is done this way, especially stuff controlled by the ECM.

[tulpa]

This video is a gem. It really helped me understand what I need to do to properly wire my jeep accessories. Thanks!

[tehdreamer]

Bought a similar box for LED light bar, fog lights and rear lights. Although it feels like overkill for the LED lights, I might add more stuff later and it will look cleaner. Thanks for the vid!

[LetsGoBrandon_]

Pretty cool setup and demo. I've worked with HDPE welding and fab for past 30yrs but it looks like ABS is more popular for these projects so I'm switching materials to support some of the off-road community. Thanks for all your info here.

[Sanjuro]

Best explanation of relays I’ve ever heard.

[richardniblack]

good rundown... I know a lot of my offroad buddies and I like to run the grounds through the switches and the relays instead of the hot as it makes for a lot less "hot wires" running through the vehicle meaning less likely to short out on a grounded surface. That way if the wire does get damaged and shorts the only downside is the component turns on as if you had activated the switch. Kind of like a horn or a dome light on most vehicles uses the ground as a trigger.

[seancaron]

I love when a video is exactly what I was trying to find lol awesome video thank you!

[Ghostrider]

This video is perfect. I’m trying to clean up the wiring from 3 set of light I have on my truck. Hate having three different sets of fused and relayed wiring harnesses under the hood. Thanks!

[nicholaskoenig]

Good work!
Man this helps a LOT, and Ive watched 15 of these....took notes. Thanks so much!!

[mikem]

Great video. Nice to see the carb is working good

[RatelLaw]

Thank you for sharing your expertise. Always interesting and informative.

[chriscynefin]

The santa vs. political thing was SO WELL DONE for explaining 87(a). Thank you!

[gazeddy]

the pin numbers on "bosch" relays are according to Din 72552

[michaelfrymus]

I bought the kit you have in the video, but its pre-wired... It states its a 40A relay box, with 6 relays. Each relay is rated for 40A, and the biggest fuse is for 30A.
BUT, I think I made the wrong purchase?

I will have multiple devices that will have about 150A total, a max of 30A for a single device, most are only 3-7A.

[laurencevillegarage]

I am working with a fuse/relay box that looks like yours. Mine came with green silicone wire plugs that go in the bottom to make the case moisture proof. Do you use them or are you mounting it in a place that does not matter?

[zackfishle]

[cat reading news paper]
I need a lightup sufing santa now
[/cat reading newspaper]

[a.lumberjack]

Does 87a need to be wired, or skipped if not needed?

[zigzag]

How to you plan on mounting this? Also what is the height of the dowls your using to raise the relay box from the mounting portion? Great video!!!