In Cab Fuse Box

I put a small fuse box under the dash, back up on the firewall for all my inside mods and extras. I don't like wiring things into the truck if I can avoid it, plus it's nice to have all my DIY installed stuff fused in one spot.



This is the fuse box I used:

$11 True Mods 6 Way Blade Fuse Box for Automotive [ATC/ATO Blade Fuses] [100 Amp][LED Indicator] [Protection Cover] [10-30V DC; 12V] Auto Marine Fuse Block

https://www.amazon.com/gp/product/B00QMTAZ1W/ref=od_aui_detailpages00?ie=UTF8&psc=1

And this is the relay:

$20 Absolute USA 2 In-line ATC Fuse Holder, 2 Relay RLS125 12 VCD Automotive Relay SPDT 30/40A and 2 SRS105 12 VDC 5-Pin Relay Socket

https://www.amazon.com/gp/product/B00C0SATHE/ref=od_aui_detailpages00?ie=UTF8&psc=1

I wired it as ignition switched by tapping into the cig lighter. But you could leave it constantly powered if you preferred. I ran a separate power wire from the battery, through the grommet in the firewall and put an inline fuse on it.

I used shallow screws to mount it to the firewall material (it's actually fairly sturdy) since I didn't want to drill holes in the metal. It's on there really well so I don't expect I will have an issue with it falling off.

For external mods and extras, I'll add a separate fuse box in the engine bay:
https://www.tacomaworld.com/threads/wiring-an-aux-fuse-block-relays-and-switches-in-a-2016.401253/
Or maybe even this:
https://www.tacomaworld.com/threads/wiring-an-aux-fuse-block-relays-and-switches-in-a-2016.401253/

 

This is the relay wiring I did. But keep in mind not all relays are the same, so you need to find the wiring diagram for your specific relay.



This is where you can tap an ignition switched power wire. It's under the center console (easy to remove). I forgot which one is the positive wire though, so test that with a pen light or multi-meter.



For the battery wire, I ran that through the grommet in the firewall pictured below:

 

What types of stuff do you have running to this?

 

Only the dash cam right now, soon a glove box light, and I'm looking into powering the remote start device off it instead of wiring it directly into +pos power. I'm sure in the future there will be other stuff. I'll just need to make sure everything combined is less than about 20-30 AMPs.

 

Wise, and clean install.
I installed a TacomaPros Bussman use box, it provides a battery lead inside the switching bundle. I was thinking about installing one of these for my light bars

 

Looks good, I'm putting one in today that I made for all the led's, i hate having all those floating wires...

 

Looks good. Do you have any pics of the final install? I'm about to remove my rat's nest of wires and replace it with something nice and clean.

 

I like that relay setup too.

 

What a horrible design to leave the Main power wire terminal unprotected like that.

 

I like your idea and might do something similar. I also noticed a hazard, but instead of outright saying it’s a bad design. I’m gonna offer a helpful recommendation from the research I’ve done and the stuff I learned.

What you’re missing is a circuit breaker that matches your fuse box output.

Here are detailed threads I’ve been reading through:

https://www.tacomaworld.com/threads/diy-build-and-install-a-bussmann-rtmr-fuse-relay-block.399454/

https://www.tacomaworld.com/threads/show-off-your-aux-fuse-panels.308677/