My take on a 12-Circuit Switched Fuse Block (Install with Pics) - Toyota FJ Cruiser Forum
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#1 (permalink) Old 08-05-2013, 08:48 PM
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My take on a 12-Circuit Switched Fuse Block (Install with Pics)

As many of you know there are many people out there with an additional fuse panel to accommodate all of their accessories. I decided before my wiring gets out of hand, I better come up with a way to keep everything organized before trouble strikes! (That's just my OCD tendencies kicking in). After doing some research I decided I was not going to pay mad amounts of money for an SPOD when I can easily install a fuse panel and a relay panel and it will essentially do the same thing!

I greatly appreciate two threads in particular because I pretty much jacked a bunch of their ideas and threw my own spin on it (remember, mimicking is the highest form of flattery! ) Before I start I should reference the threads that really helped me guide my train of thought!

LandCruiserSteves:
12-Circuit "Switched" Fuse Block (Installation w/ pics)

and

Shadow-Warriors:
CLEAN 12v Fuse Block Accessory Install w/Pics

So, to begin I purchased a 12 Circuit ST Blade Fuse Block w/ Negative Bus and Cover from amazon.com (PN 5026) and HELLA H84988007 4-Way Mini Relay Box (but I don't actually thing it was a Hella product??) from amazon. I decided that I wanted a switched circuit (meaning they can access power once the ignition is on) for most of my accessories but at the same time, I wanted some with constant 12V power from the battery (like my horns and such). I decided I didn't want my fuse panel in the engine bay to eliminate the cluster of wires out in the open. I decided to locate it exactly where Shadow-Warrior did using a fabricated steel plate. I used 22gauge sheet metal and gave it a quick coat of spray on bed liner I had laying around. Here's a pic before I sprayed it.



While waiting for it to dry I decided I was going to try and figure out how I was going to wire it up. I decided I was going to use an 8 gauge amp kit with an additional fuse (Stinger 8ga. Amp kit purchased at a local car audio shop). I decided I was going to essentially follow the same wiring as LandCruiserSteve but instead of running 2 relays with switched power, I would run 1 with switched power and 1 constant to the panel. I am modifying my fuse panel exactly the same as what he did but my relay/fuse configuration is a bit different under the hood.
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#2 (permalink) Old 08-05-2013, 08:52 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

I purchased a 6"x4" project enclosure from radio shack and got a few rubber grommets. I drilled 2 holes on one end:

Three holes on the other end:

and two holes through the lid:

I mounted the two fuse brackets to the bottom of the box:

and fitted my two fuses into the brackets:
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#3 (permalink) Old 08-05-2013, 08:57 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

I decided to go with fuses instead of circuit breakers because I am not nearly finished with my setup. As my system grows, the amperage will grow requiring different fuses along the way. I find it best to match as closely to the system as possible to you don't cause damage to anything. After the base of the box was good to go I fit the relay junction on top of the box with the existing legs that it comes with:


Here is what the box currently looks like:


This will be mounted right behind the OEM fuse panel under the hood. This is as far as I have gotten tonight. I should be wiring things up and putting them into place tomorrow night. More pics to come as the wiring gets done and as I mount the units into place. Thanks for looking!
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#4 (permalink) Old 08-05-2013, 09:04 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

Good thought process. Are you saying you are going to run the constant through a relay as well? I don't follow if that's the case.


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#5 (permalink) Old 08-05-2013, 09:10 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

No, my mistake if I makes it sound like that, constant will go directly from the battery through the fuse to the panel, the switched will go through the relay with a signal wire from the ignition.
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#6 (permalink) Old 08-05-2013, 09:12 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

Quote:
DanMan90 previously said: View Post
No, my mistake if I makes it sound like that, constant will go directly from the battery through the fuse to the panel, the switched will go through the relay with a signal wire from the ignition.
Got ...that's what I thought you were doing, but got thrown off a bit on wording. Good luck!


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#7 (permalink) Old 08-05-2013, 09:15 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

Thanks!
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#8 (permalink) Old 08-06-2013, 08:46 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

Didn't get to any wiring because I couldn't find my darn solder! Here's a pic of the bracket tho.

Decided I may keep the ground plane on the circuit board and modify it slightly differently than usual. I want it to accept 2 different power circuits, one constant and one switched while leaving access to a solid ground connection.
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#9 (permalink) Old 08-07-2013, 06:59 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

I'm going to try to do the exact same thing with a Blue Sea Systems box. Two "hot" feeds and a common ground bus


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#10 (permalink) Old 08-07-2013, 09:01 PM
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Re: My take on a 12-Circuit Switched Fuse Block (Install with Pics)

I think I figured out how to do it. I'll post a pic tomorrow. By "hot" do you mean constant power from the battery?
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