Adding fuses and a relay to stock fusebox

Im planning to add some circuitry to power a two sets of additional lights, and would like to add a relay and a fuse to the existing fuse box, as there are already B+ and ground sources in place.

As you can see there are two empty relay spots. The lower one already has a B+ post installed, and takes a square relay similar to the starter relay. The one where I am pointing takes a standard relay similar to the EFI relay.



Does anyone know what snaps into this open space in the fuse box? I thought i found a relay holder off a 4runner that would work, but the tab is recessed. This would need to stick out.

 

I wouldn't add relays and more fuses to a box especially to power a light bar if it puts too much power out you can short your entire fuse box just run a wire to the battery with an in line fuse with a 20 amp fuse in there and you'll never have to worry about it. If fuse blows you replace no other problems

 

This i dont believe is true. There are 40 and 60 amp fuses being serviced from the B+ in this box, the most i am looking to add is a 20 amp circuit. I was able to pull fuse sockets with what look like 14 gauge wire from a 4runner that i can solder into anything else im using. Only difference to what yore saying is that the fuse in relays are outside this box, vs inside.

 

I guess so but I meant in line fuse like connected straight to battery that way your light bar doesn't short out the entire fuse box it just shorts out your fuse I've never really messed with adding relays and everything like that so I'm no sure if there would be a problem just throwing out my opinion

 

You have access to some tools and knowledge that I don't, but I personally would be VERY circumspect before modifying the wiring in the factory fusebox, even on a pre computer vehicle.

What you have right now is a good running truck. The smallest mistake could short out whatever the most expensive thing is, leaving you with yard art that needs thousands of dollars to restore the factory wiring so you have a truck again.

I am not saying you can't do it, just the risk is way up there.

There are a ton of add on fuse boxes in this thread: https://www.tacomaworld.com/threads/show-off-your-aux-fuse-panels.308677/

The common theme with these is a big fuse (or circuit breaker) between the battery and the distribution panel, and then go crazy adding circuits. If you screw something up you will still have a toyota truck, but you will need to repair your DIY circuitry.

If you are SURE that all you want to add is two pairs of lights you could pull the clutch reservoir bracket and two bolts holding it in from a manual tranny tacoma at the junkyard. Drill a couple holes in the bracket to mount your two solenoids, use the bolts to bolt the bracket into your truck, and go.

Ready made lighting harnesses from LightForce, KC and etc will have a master fuse just 2-3 inches from the ring terminal that mounts on the red post of the battery. If something goes wrong with your lights, the main fuse blows and the rest of your truck is unharmed.

Finding a manual tranny tacoma at a junkyard is a bit of a challenge. On my 2015 the two bolt holes are M8x1.25, I can sink a 25mm long bolt down to the paint in both of those holes without touching anything on the blindside. Out of a SAE drill bit set you'll need the 3/8's bit to drill a hole big enough for an M8 bolt to pass through.

You could start with a bar of steel maybe 1" wide, 1/8" thick and a foot long, bend it in kind of a "W" shape using a vise, put your through holes for the bolts in the valleys of the W and have room for five or six solenoids if you want to add more later.

 

Didn't read all of it but first paragraph is exactly what I was thinking seems sketchy

 

use an auxiliary fuse panel... check out my thread...