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Adding a Dual Battery

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Nasty Senior Enthusiast

Nasty

Posted
Posted
6 minutes ago, RACERX7775 said:

What about adding another ground sensor for batt2 and wire that one into the factory sensor... they only cost like $25.

Im not sure of that would work. No clue if the truck could regulate 2    might as well give it a try.  

 

Personally i would have wired it differantly and upgraded the ground and alt wire but thats just me   

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tenscourts
tenscourts

I've gone through this entire process. See my build thread and pm me if you need additional info. BTW the OE battery size will not fit the second tray. Again, read my thread. I have part #s, pictures,

Vuk
Vuk

This is the battery tray, secondary auxiliary relay, and the optional 3 fuse box and cover for older model years if you want to replace the single fuse box on the aux battery harness:

Vuk
Vuk

My setup is complete now with nice factory-looking points to hook up an inverter. Should I ever need to jump start the primary battery, I can always run jump cables from aux battery to the primary.

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RACERX7775 Enthusiast

RACERX7775

Posted
Posted
3 hours ago, Nasty said:

 

 

Personally i would have wired it differantly and upgraded the ground and alt wire but thats just me   

Usually, that would be the first thing i usually would do. But when i did the stereo on this truck, for some reason, since i did the charge cable to the second battery, i didnt wanna touch anything that was attached to the factory battery. I dont know why.... but that was just my thought...

 

 

This discussion has way more posts than i ever thought. The thing i noticed about some threads on here is, like this one, we can have thoughts and posts, right or wrong, and none of us has been rude, disrespectful, and nasty(no pun intended). This just shows that most who are on here really are nice people who want to help others.  

 

Wow, i feel like my fem side just came out. LOL... Now Im gonna finish my beer...

higsy Enthusiast

higsy

Posted
Posted

Hi guys.. hope you don't mind me asking a question related to the dual battery... I'm running a factory isolator which needs a 12v and a 12v switched. My truck being a 2018 there don't seem to be alot of information regarding this... is there a switched 12v in the under hood fuse box ?

RACERX7775 Enthusiast

RACERX7775

Posted
Posted

Sure there is. What FACTORY isolator do you have? Didnt even know there was one. Your truck come with single or dual batts? I wanted to go completely factory when i did my setup, but it was more than i wanted. 

higsy Enthusiast

higsy

Posted
Posted

Hi guys.. hope you don't mind me asking a question related to the dual battery... I'm running a factory isolator which needs a 12v and a 12v switched. My truck being a 2018 there don't seem to be alot of information regarding this... is there a switched 12v in the under hood

higsy Enthusiast

higsy

Posted
Posted

GM P/N 12135194). GM calls this a "secondary auxiliary relay".  I've got a single battery but I'm upgrading.

1SLOW1500 Senior Enthusiast

1SLOW1500

Posted
Posted
23 minutes ago, higsy said:

GM P/N 12135194). GM calls this a "secondary auxiliary relay".  I've got a single battery but I'm upgrading.

There is but this begs the question.....why not just keep buying the stock PnP parts? 

 

RACERX7775 Enthusiast

RACERX7775

Posted
Posted (edited)
1 minute ago, 1SLOW1500 said:

There is but this begs the question.....why not just keep buying the stock PnP parts? 

 

Lol. And the topic cycle starts again. Lol

Edited by RACERX7775
1SLOW1500 Senior Enthusiast

1SLOW1500

Posted
Posted
I was litterally just on the internet looking at 200amp isolators for $59.
Yes this stock part is cheaper but not rated as high not that that is needed. But the price on the wiring for gm is up there. Still 200 for the whole kit isn't bad.

Sent from my SM-N950U using Tapatalk

RACERX7775 Enthusiast

RACERX7775

Posted
Posted

I guess depending on how much power is needed, it might be a good way to go. With both of my JL Audio amps, my max power is only 130 amps. I just tend to go bigger than what is needed. With everything. Thats why all my cable is 2/0..

higsy Enthusiast

higsy

Posted
Posted

Everything I got was cheap , as in not directly from gm , but mouser and a few others. Making the cables myself (1/0). 

Now what I'm looking for is 12v switched in the engine bay ??

RACERX7775 Enthusiast

RACERX7775

Posted
Posted

I cant tell you exactly what wire to hook up to. But just get the owners manual and find a switched fuse that you can tap into.

higsy Enthusiast

higsy

Posted
Posted

I was hoping to use an open pin or circuit.  Is this possible... I want to make sure I don't mess up anything in the bcm.. the electronics seem pretty touchy. 

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