Duramax battery cables

[racedaymechanic]

Im in the process of building my first set of 2/0 Cables for the Duramax and I have to ask a couple questions, do you ever use the + connection that junctions in the Red Box? Im wondering how necessary it is, If I do use it I will run a 2 gauge wire to it and the 2/0 will go straight from the Battery to the starter and not have the junction at the Red Box, I also don't have the ground that runs separate from the rest of the cables, I assume it goes to the engine but I dont know where or how long that cable is, Thanks Bruce

 

[Pepperidge]

I use the red battery box for most of my 12v add ons instead of a ring terminal added on the battery... my airdogII, electric water pump and something else?(maybe it's the alternator wire?)...not sure on which ground you are talking about/missing but IIRC there are at least two that go to the engine block about 4 inches back(from front of block) and about 2-3 inches above the oil pan on each side of the block...the wires run in a loom mounted to the oil pan across the front of the oil pan and around to the starter...It's dark out, but I could look in the a.m. and double check...

 

[racedaymechanic]

I use the red battery box for most of my 12v add ons instead of a ring terminal added on the battery... my airdogII, electric water pump and something else?(maybe it's the alternator wire?)...not sure on which ground you are talking about/missing but IIRC there are at least two that go to the engine block about 4 inches back(from front of block) and about 2-3 inches above the oil pan on each side of the block...the wires run in a loom mounted to the oil pan across the front of the oil pan and around to the starter...It's dark out, but I could look in the a.m. and double check...

Thanks I figured that was what its used for, The Factory setup runs the starter Cable thru that box, Im thinking a 2 gauge wire would be plenty for the Alt and accessories,thats what GM used to go to the starter, The Alt cable is quite small 6 ga. with a 50 amp fusible link, is that sufficient?

 

[Pepperidge]

not everyone may use that as a power source for add ons...it is mainly supposed to be where you jump start the vehicle...and where the alternator wire goes...my guess is thats why both batteries junction there so it can charge both??

as far as the alternator cable gauge...you are the expert, so I would have to defer that back to you...

 

[tanman_2006]

I run my bale spike hydraulic pump and subwoofers off the red box as well as jump vehicles

 

[racedaymechanic]

not everyone may use that as a power source for add ons...it is mainly supposed to be where you jump start the vehicle...and where the alternator wire goes...my guess is thats why both batteries junction there so it can charge both??

as far as the alternator cable gauge...you are the expert, so I would have to defer that back to you...

They actually junction at the starter, Im sure the Alt lead is fine, with a 50 amp fusible link 6 gauge copper is rated at 55 amps

 

[Pepperidge]

They actually junction at the starter, Im sure the Alt lead is fine, with a 50 amp fusible link 6 gauge copper is rated at 55 amps

I haven't opened it in a while...guess I got it wrong...like I said...You're the expert

What I do know is: that box ain't big enough for everything...it's busting at the seams/hinge

 

[racedaymechanic]

I haven't opened it in a while...guess I got it wrong...like I said...You're the expert

What I do know is: that box ain't big enough for everything...it's busting at the seams/hinge

Thats why I think if I just run a lead to it and not back out it will free up alot of space in it.

 

[RI Chevy Silveradoman]

Do you need a photo of it? I'll open the red box and photo the inside. If so, I will go and get one.

 

[racedaymechanic]

Do you need a photo of it? I'll open the red box and photo the inside. If so, I will go and get one.

Not of the box I have that just the general routing of the cables and where the grounds go

 

[RI Chevy Silveradoman]

Photos

OK. I'll try. I'll try and get a photo from the bottom where the ground is attached to tomorrow. I'll have to take the bottom apart for that.

 

[racedaymechanic]

Thanks RI I appreciate this

 

[83GMCK2500]

I am excited to see these come together. I will be following this thread.

 

[racedaymechanic]

I ordered up a few different terminal ends that I didnt have to do this deal, should be here by Wed

 

[RI Chevy Silveradoman]

Rain here today. I'll try and get the photos tomorrow.

 

[racedaymechanic]

I should have the first set done this weekend.................Who wants to be the Ginney Pig?

 

[RI Chevy Silveradoman]

:hello:

 

[racedaymechanic]

Here they are on my Forum
http://www.thetruckstop.us/forum/showthread.php?33946-DURAMAX-Battery-Cables-READY!!-PHOTOS/page2

 

[RI Chevy Silveradoman]

Grounds

Not of the box I have that just the general routing of the cables and where the grounds go

I know this is a little late, but here is the photo of where the grounds connect to.

Looks like it connects to the engine block with a bolt.

 

[racedaymechanic]

I know this is a little late, but here is the photo of where the grounds connect to.

Looks like it connects to the engine block with a bolt.

Is that the Driver side Ground? I Have the Pass side Ground I just need a length for the Driver side one