Big 3 questions

[Jake Urwiller]

Hey guys, I have a 93 eclb 2500 4x4. Getting ready to do the big 3. All the threads I read say the positive goes from alternator to battery. Right now my positive from alternator goes into a main look along engine and I think to a distribution block on firewall. Do I abandon this and go straight to the battery with new cable? Or should I also keep this hooked up? Right now the only leads on the positive side of the battery are the main starter wire and a much smaller wire goin to the starter.

 

[gric_az]

On my 88 2500, My wiring is the same as you described. what are trying to accomplish by switching it up?

 

[kennythewelder]

Dont do away with anything you have now. Just add a new wire with a fuse from the posititive post on the battery,
to the positive post on the alt. Another wire from the frame of the alt to the neg post on the battery, and amother new wire, from the alt frame, or battery neg to the frame of the truck. You can add a 4th wire to the body of the truck, and a 5th to the engine block.

 

[5vortec7]

https://www.gmt400.com/threads/big-3-and-dual-battery-kits.41818/

I can help you out

 

[kennythewelder]

I have this same post on this forum, somewhere, but I will be damn if I can find it. It wont come up in a search. Anyway here is my write up on the big 3 - big 5 upgrade I did on my 97 Silverado. This is on another GM truck forum, so just click the link.
https://www.gmtruckclub.com/forum/threads/big-3-up-grade-that-turned-into-a-big-5.1183593/