Adding a Dual Battery

[Nasty]

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   

[RACERX7775]

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]

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]

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]

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]

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

[1SLOW1500]

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]

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 November 25, 2018 by RACERX7775

[RACERX7775]

I was litterally just on the internet looking at 200amp isolators for $59.

[1SLOW1500]

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]

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]

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]

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]

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. 

[RACERX7775]

Yeah. Im sure there has to be atleast one open under the hood.