Firewall circuit breaker

[gigmo]

Does anyone know the amp rating on the circuit breaker on the firewall? i'm thinking of using a mega fuse setup with midi fuses. Did any of ya'll install these.

You must be registered for see images attach

 

[Turbo4whl]

Does anyone know the amp rating on the circuit breaker on the firewall? i'm thinking of using a mega fuse setup with midi fuses. Did any of ya'll install these.

You must be registered for see images attach

Not a circuit breaker, just a terminal block to hook multiple wires.

 

[CalSgt]

Does anyone know the amp rating on the circuit breaker on the firewall? i'm thinking of using a mega fuse setup with midi fuses. Did any of ya'll install these.

You must be registered for see images attach

As @Turbo4whl says it is a junction block

There would normally be two fusible links from that junction feeding the fuse box (bulkhead) located at the far right of the firewall.

 

[pinballlarry1]

It's only a junction block without any protection feature. Old folklore misnomer that won't die. But it is a great place to tap in for an auxiliary fuse block.

You must be registered for see images attach

You must be registered for see images attach

 

[Old Guy Bill]

I don't have a pic but, there is also a thin piece of conductor that goes between the two posts...

 

[squaredeal91]

Its often added/used for trailer brakes

 

[75gmck25]

On my camper special there is a wire from that junction over to a relay on the fender. That relay is used to charge the aux battery and/or power the camper.

The camper relay connects the aux battery to the alternator when the truck is running, but then isolates the aux battery when you turn off the ignition. It prevents you from running down the main battery when the truck is turned off and you are using the camper.

 

[gigmo]

has anybody used mega fuses or midi fuses in place of fuse links? Like this setup

 

[Sad Sack]

has anybody used mega fuses or midi fuses in place of fuse links? Like this setup

Consensus is - don't. Stick with stock.

 

[Frankenchevy]

has anybody used mega fuses or midi fuses in place of fuse links? Like this setup

Not that setup specifically, but I run z case fuses on my vehicles. Haven’t ever had issues.

Edit: If you decide to go a non-stock route, stick to name brand components. For instance, you previously used the term circuit breaker. For automotive circuit breakers I would only use Blue Sea Systems or someone similarly reputable. You need that fuse or breaker to open at the time and current rating that it stated to, and there’s no guarantees with Amazon components.

 

[gigmo]

Not that setup specifically, but I run z case fuses on my vehicles. Haven’t ever had issues.

Edit: If you decide to go a non-stock route, stick to name brand components. For instance, you previously used the term circuit breaker. For automotive circuit breakers I would only use Blue Sea Systems or someone similarly reputable. You need that fuse or breaker to open at the time and current rating that it stated to, and there’s no guarantees with Amazon components.

Not amazon but a reputable guy.

 

[CalSgt]

has anybody used mega fuses or midi fuses in place of fuse links? Like this setup

Yes, but...

I made the switch because I was doing a shaved firewall, added a metric ton of electronics and the truck is not a daily driver otherwise I would have kept them. Fusible links are a pretty stout and reliable way of fusing, If you are going to swap fuse types try to get something that burns slowly.

IIRC
fuse block relocated to passenger side wheel well near the frame
0 Ga from the fuse block to battery
4 Ga from alternator with 175 amp fuse
4 Ga to the fuse box with ?? amp fuse
4 Ga to the stereo amp with 60 amp fuse
8 Ga to fans with a 60 amp fuse

You must be registered for see images attach

You must be registered for see images attach

 

[gigmo]

do

Not amazon but a reputable guy.

Yes, but...

I made the switch because I was doing a shaved firewall, added a metric ton of electronics and the truck is not a daily driver otherwise I would have kept them. Fusible links are a pretty stout and reliable way of fusing, If you are going to swap fuse types try to get something that burns slowly.

IIRC
fuse block relocated to passenger side wheel well near the frame
0 Ga from the fuse block to battery
4 Ga from alternator with 175 amp fuse
4 Ga to the fuse box with ?? amp fuse
4 Ga to the stereo amp with 60 amp fuse
8 Ga to fans with a 60 amp fuse

You must be registered for see images attach

You must be registered for see images attach

looks great man

 

[AuroraGirl]

has anybody used mega fuses or midi fuses in place of fuse links? Like this setup

MAXI fuses are designed to replace fusible links, not sure about MIDI or or mega.
even then, they are engineered differently so you wouldnt use equivalent ratings between them or size wires youd have to be much more subject matter expert to be able to confidently replace it on your own

 

[Zelph]

has anybody used mega fuses or midi fuses in place of fuse links? Like this setup

Yup. Very common especially in the 4X4 and off-road community.

Get a quality unit. As an example,

https://www.mouser.com/new/littelfuse/littelfuse-zcase-fuses/?srsltid=AfmBOopqRxWVPqvgIIRdjGBNxbC7HnpVgqGP1qUsHB52FfjDN-QjkGkT