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Old 11-10-2020, 11:36 AM #1
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Relay Fuse block and Wire Run Locations

I'm in the process of building a custom relay/fuse block that I plan to locate under the hood. It looks to me like the best place would be on the passenger
side of the compartment (see picture). There is some component that is slightly in the way that I was wondering if I could relocate (see ? in picture).

Also, have a look at my layout, does it make sense? The point is to have 6 relays going to 6 different components (lights, etc) that are triggered from a 6 panel switch bank under the stereo (paranoid fabrications din plate). I would then tap a fuse to run the ACC relay so that they would only be on when the key was on.

The plan was to mount the bus bars under the board and cut a hole under the relay box to feed the wires. The component power wires and the switch wires would then snake back up and over to the distribution terminals.

Currently, it is on a 12x12 sheet of abs, but I think I could make it smaller than 12 by 12 if needed. I also have a sheet of acrylic coming in that I might substitute instead.

The other big question is, does someone have a photo of where in the truck to run the high current power wires to the back? I plan on coming through the firewall where the clutch area would normally be but from there I would want to run at least 2-3 of the component wires to the back (for backup lights, scene lights, maybe a compressor someday, etc). I vaguely remember some threads where people talked about channels but I'd rather not have to tear out my entire interior to run 2 wires

Any advice would be much appreciated.
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Relay Fuse block and Wire Run Locations-screenshot_31-jpg  Relay Fuse block and Wire Run Locations-screenshot_32-jpg  Relay Fuse block and Wire Run Locations-screenshot_33-jpg 
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Old 11-10-2020, 12:03 PM #2
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I recently did something similar along with the "big 3" wiring. Driver side is convenient because you are already close to the battery. There is also a grommet on the firewall that is very convenient for running wiring into the cab, (sorry no picture).

I haven't started adding accessories but there is plenty of room for relays over there. I've seen some people riv-nut them onto the inner fender and looks very clean.

There is also plenty of room height wise.



Also, I'll throw a plug out for SDHD's battery terminals, they are very nice.

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Old 11-10-2020, 09:42 PM #3
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Quote:
Originally Posted by cblock406 View Post
I recently did something similar along with the "big 3" wiring. Driver side is convenient because you are already close to the battery. There is also a grommet on the firewall that is very convenient for running wiring into the cab, (sorry no picture).

I haven't started adding accessories but there is plenty of room for relays over there. I've seen some people riv-nut them onto the inner fender and looks very clean.

There is also plenty of room height wise.



Also, I'll throw a plug out for SDHD's battery terminals, they are very nice.

what are the measurements on your mounting piece? I wonder if I could get everything on there. I do like that it's closer to the battery though
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Old 11-10-2020, 11:15 PM #4
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Quote:
Originally Posted by Doc3g View Post
what are the measurements on your mounting piece? I wonder if I could get everything on there. I do like that it's closer to the battery though
I’ll measure tomorrow and let you know. I think I started off with a 12x12 piece of aluminum.
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Old 11-11-2020, 10:02 AM #5
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Quote:
Originally Posted by Doc3g View Post
I'm in the process of building a custom relay/fuse block that I plan to locate under the hood. It looks to me like the best place would be on the passenger
side of the compartment (see picture). There is some component that is slightly in the way that I was wondering if I could relocate (see ? in picture).

Also, have a look at my layout, does it make sense? The point is to have 6 relays going to 6 different components (lights, etc) that are triggered from a 6 panel switch bank under the stereo (paranoid fabrications din plate). I would then tap a fuse to run the ACC relay so that they would only be on when the key was on.

The plan was to mount the bus bars under the board and cut a hole under the relay box to feed the wires. The component power wires and the switch wires would then snake back up and over to the distribution terminals.

Currently, it is on a 12x12 sheet of abs, but I think I could make it smaller than 12 by 12 if needed. I also have a sheet of acrylic coming in that I might substitute instead.

The other big question is, does someone have a photo of where in the truck to run the high current power wires to the back? I plan on coming through the firewall where the clutch area would normally be but from there I would want to run at least 2-3 of the component wires to the back (for backup lights, scene lights, maybe a compressor someday, etc). I vaguely remember some threads where people talked about channels but I'd rather not have to tear out my entire interior to run 2 wires

Any advice would be much appreciated.
The component with a question mark on it is your cruise control module/motor.

As far as where to run high current wires to the rear, if it were me I would replace the rear cabin air equalizer with the 2001-2002 one. It has a hole that you can put a rubber grommet in and you could run the wires along the frame and then into the rear driver side of the vehicle behind the back trim panel. There's a nice cavity back there you might be able to locate your rear relay panel as well. Part number is 62940-35020. This should give you a better idea of what I'm talking about and where it's located: https://www.google.com/search?newwin...4dUDCA0&uact=5
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Old 11-11-2020, 03:57 PM #6
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Can you explain your setup more? What are the components labeled for high and low current devices in your image? Seems redundant with the pos/neg bus bars? I am in process of this exact project but at the moment I just have a BlueSea fuse box with negative bus and a circuit breaker.

Location wise, I played around with a bunch of locations and ended up right back to the driver side near the battery. Most likely on top of the existing fuse box with an AL sheet. The main reason for not putting it on the other side is wiring. One point of the project is to clean up the accessory wires. It felt a little counter productive to put it on that side.
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Old 11-11-2020, 04:55 PM #7
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So mine measures about 10" wide and 10.5 inches long with a notch for the master cylinder. I also folded another inch or so width wise to bolt to the inner fender.
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Old 11-11-2020, 08:25 PM #8
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Quote:
Originally Posted by Doc3g View Post
I'm in the process of building a custom relay/fuse block that I plan to locate under the hood. ....

Any advice would be much appreciated.
I'm not saying this is your solution... it's just what I did and maybe it will give you some idea's?



I have also added in a fuse into a blank space in the factory fuse box. it's not hard at all but it does require some special parts and a trip to pick-n-pull for said parts. or... order from overseas? I can try to find that vid location if your interested.
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Old 11-11-2020, 11:04 PM #9
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Not at all what you guys are doing here, but there is a nice space for an interior blue seas box under the glove box. I put a small 4 pos one there for ‘full time on’ loads like an extra cig lighter. Just one heavy connection from there up to the battery. It’s nice to have a good +12v supply inside.
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Old 11-11-2020, 11:27 PM #10
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Originally Posted by Kanoe View Post
Not at all what you guys are doing here, but there is a nice space for an interior blue seas box under the glove box. I put a small 4 pos one there for ‘full time on’ loads like an extra cig lighter. Just one heavy connection from there up to the battery. It’s nice to have a good +12v supply inside.

Take the air bag out and it’s a nice big hole. Relay Fuse block and Wire Run Locations


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Old 11-12-2020, 05:17 AM #11
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I think one of the differences about my setup that makes it challenging to copy some of the designs y'all have used is that I'm running a relay box as opposed to simply a fuse block like the blue sea unit. I want to run relays b/c my understanding is that the switches typically won't handle the high current for big accessories like multiple light bars.

This is basically the style of setup I'm going for, though, ideally, I would like to add a blue sea box in addition to the relays to power some lower current stuff.

How To Make A Power Relay / Fuse Block | Automotive Wiring - YouTube

As for neatness, I found a thread on here where someone put an ARB compressor in essentially the spot I want to put my relay/fuse panel and it looked very well organized even with all the wiring.

I also got a sheet of acrylic today and I'm thinking that maybe, just maybe if I relocate a couple of small things on the driver's side that I can gain enough real estate to put the mount over there.
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Old 11-12-2020, 05:25 AM #12
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Quote:
Originally Posted by Bad Luck View Post
The component with a question mark on it is your cruise control module/motor.

As far as where to run high current wires to the rear, if it were me I would replace the rear cabin air equalizer with the 2001-2002 one. It has a hole that you can put a rubber grommet in and you could run the wires along the frame and then into the rear driver side of the vehicle behind the back trim panel. There's a nice cavity back there you might be able to locate your rear relay panel as well. Part number is 62940-35020. This should give you a better idea of what I'm talking about and where it's located: https://www.google.com/search?newwin...4dUDCA0&uact=5
Do you know if the bumper has to come off in order to do the swap? Also, has anyone ever relocated the cruise control unit?
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Old 11-12-2020, 10:52 AM #13
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Do you know if the bumper has to come off in order to do the swap?
The driver side bumper corner piece needs to be removed.
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Old 11-12-2020, 12:08 PM #14
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Relay Fuse block and Wire Run Locations

Quote:
Originally Posted by Doc3g View Post
Do you know if the bumper has to come off in order to do the swap? Also, has anyone ever relocated the cruise control unit?

People have made brackets to move the cruse unit.


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Old 11-12-2020, 12:14 PM #15
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It seems silly to me to move stuff around put it on the passenger side since there is ample room, the battery, and a very convenient firewall plug on the driver's side. But I suppose that's why we all build our 4Runners different.

I will essentially have the same setup as you are trying to do. One of my breakers is for the alternator, the other is to power the fuse block and is switched with the ignition. When I start adding accessories they will all be on relays as well.
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