Fuse block connected to aux power system in the 2021 Ford Bronco

Fuse Block

Posted on April 23, 2022

How I added a fuse block to my Aux battery system.

Fuse block ready for 12 volt accessories.

Alright I needed to install a fuse block on to my aux power system so I can use my accessories.

Main Parts

Tools Used

The main purpose of the fuse block is to connect my devices to my aux battery.

First thing I did was change out the wires going from my aux battery to my aux battery charger.

Disconnects

I installed the 2 pin quick disconnects, the disconnect with the fuse went on the battery charger and the other one went on the battery.

I had to mod the disconnect without the fuse a little to get it to work. The 2 pin connectors for both disconnects were in the same orientation and the o rings on the disconnect without the fuse were too small to fit my aux battery terminals.   Male to male and female to female are not going to work. So I cut the o rings off the disconnect without the fuse and crimped on new connectors that would fit my aux battery terminals. Then changed the orientation of the 2 pin connector so when it was connected to the disconnect with the fuse, it was male to female x2. The wiring may be red to black x2 now, but it works.

Renogy dc-dc battery charger connected to a Renogy 12V 100AH battery using 2 pin quick disconnects.

Circuit Breaker

Next I installed the 100 amp circuit breaker. I held the circuit breaker on my back board to figure out where I wanted to mount it. I decided on the left of my aux battery charger just above the wires going from the aux charger to the aux battery.

I secured it with two wood screws and my drill gun. Then cut, crimped, and heat shrunk a positive wire to connect the aux battery to the positive in on the circuit breaker.

A 100 amp circuit breaker connected to the 12+ of the Aux battery for a Aux battery system in a 2021 Ford Bronco

Fuse Block

Moving on I grabbed the fuse block and mounted to the left of the circuit breaker. I again secured it with wood screws and my drill gun. Then I cut, crimped, and heat shrunk a positive wire to connect the positive input of the fuse block to the positive output of the circuit breaker. Continuing on, I cut, crimped, and heat shrunk a negative wire and connected the negative input of the fuse block to the negative output of the aux battery charger. Then I put the cover on my fuse block and I was done.

A fuse block connected to power and ground. With a protective cover on before any circuits are connected to it.

To long didn’t read ( TLDR)

In conclusion, This is how I installed the fuse block into my aux battery system. 

I changed the wiring going from the aux battery charger to the aux battery to  quick disconnects.

I installed a 100 amp circuit breaker between the battery and the fuse block.

I installed the fuse block with the positive going to the 100 amp circuit breaker and the negative going to the negative output of the aux battery charger. 

Thanks for reading my post on how I installed my fuse block into my aux battery system.

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