How important is proper ground????

[TheFiverMan 10+ year member]

about as important as a box..

 

[jrwalte 10+ year member]

And by that he means the sub box is extremely important //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

You should have 3 ANL fuses, not two. 1 at front bat going to rear bat. One at rear bat going to front bat and 1 from rear bat to distro block. All should be fused within 18" of the bat.

And 250A is fine unless you're pulling more than 3000RMS.

 

[Black Truck 10 10+ year member]

And by that he means the sub box is extremely important //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
You should have 3 ANL fuses, not two. 1 at front bat going to rear bat. One at rear bat going to front bat and 1 from rear bat to distro block. All should be fused within 18" of the bat.

And 250A is fine unless you're pulling more than 3000RMS.

You lost me here, why am I running a positive from my rear battery to my front battery? I thought I was only running the ground? your not supposed to fuse grounds correct?

 

[jrwalte 10+ year member]

You lost me here, why am I running a positive from my rear battery to my front battery? I thought I was only running the ground? your not supposed to fuse grounds correct?

You have to run positive and negative to rear bat from front bat, and then positive and negative from rear bat to amps.

You want to fuse within 18" of any positive run from a battery. That is 2 on the run from front bat to rear bat and one on the rear bat to amps.

 

[terra 5,000+ posts]

You have to run positive and negative to rear bat from front bat, and then positive and negative from rear bat to amps.

why?

 

[jrwalte 10+ year member]

why?

When running a second battery it's recommended to run a negative wire rather than the frame due to less resistance and the ability to handle higher current. In fact, it's always better to do a negative run to the rear, it's just cheaper and easier to install using the frame.

 

[terra 5,000+ posts]

When running a second battery it's recommended to run a negative wire rather than the frame due to less resistance and the ability to handle higher current. In fact, it's always better to do a negative run to the rear, it's just cheaper and easier to install using the frame.

That depends on the situation. Depends on the frame construction. My experience in my car says differently.

 

[Black Truck 10 10+ year member]

so isnt that 2 positives? I know im missing something here as to why you say 3.

 

[Jameseypoo 5,000+ posts]

You could have engine whine issues with multiple grounds

 

[jrwalte 10+ year member]

so isnt that 2 positives? I know im missing something here as to why you say 3.

Yes. You're missing the fact that the postive run from the front to the rear needs to be fused at both batteries. Otherwise if the wire shorts it'll still get power from one of your batts to cause damage.