My in-line fuse keeps blowing. Why?

[BacksideUSA 10+ year member]

Yesterday i added a set of rainbow comps, and a jl 360 amp to my system. (I also have a kicker 750 amp powering my subs) After i hooked everything up, i went to reconnect the negative battery terminal, and it went POP and blew my fuse. i replaced the fuse with a spare, and it just did it again.

i have a distribution block with 2 inputs and 4 outputs. i am running 4 gauge power and ground wires to each input, and then running 4 gauge power and ground wires from each output, to their respective amp. i've triple checked all my connections, and they're all legit.

Should i be running thicker gauge leads? Is it ok to run power and ground wires out of one distribution block?

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[24v 10+ year member]

If it is blowing the fuse as soon as you connect it, you have a short. Go over all of your power wires again. Something is more than likely grounded somewhere.

 

[x1le 10+ year member]

Is it ok to run power and ground wires out of one distribution block?

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[24v 10+ year member]

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WOW, good catch, I missed that one. Definitely NOT ok to run power and ground from the same dist. block.

 

[Phoenix Risen 10+ year member]

WOW, good catch, I missed that one. Definitely NOT ok to run power and ground from the same dist. block.

i can make that work. i also have a distro that is made to do this.

op you are going to need a second distro block for the ground wires.

 

[brandinooooo 10+ year member]

WOW, good catch, I missed that one. Definitely NOT ok to run power and ground from the same dist. block.

This..

And make sure you have the right fuse for the power your running.

Example.

500 rms -> 50A fuse

1000 rms -> 100A fuse or 2x 50A

 

[SPLC]

Obvious troll is obvious.

 

[keep_hope_alive Premium Member]

Take some good pics of your distribution.

You can use a DMM to look for a short.