stupid trunk battery wiring question

[NMLegend19 10+ year member]

alright well i feel retarded for asking but whatever. I'm gonna put a g31 in the back but a few wiring options come to mind. Do i run 1/0 straight from the alt to the second battery, or rather from the starting battery + to the second battery??

also for grounding do i use another run of 1/0 from the second battery - to the starting batt -? or can I ground to chassis under the trunk?

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[sacking74 10+ year member]

run wire from front batt to rear batt and ground the rear batt in the trunk or under.

 

[thegreatestpenn 5,000+ posts]

u can go straight from the alt, but its easier to just run it from the front battery.

 

[NMLegend19 10+ year member]

alright great thanks guys

 

[Wingman0121 10+ year member]

run wire from front batt to rear batt and ground the rear batt in the trunk or under.

x2 that's how I did mine.

 

[audiolife 5,000+ posts]

Actually the best ground I have found is run a 0 ga wire back up to the alt bracket.

 

[dustyshot 10+ year member]

Since, I already had two ground in trunk that is very hard to move even with tools that grounds are together. I just used the extra ground for the battery. That is not a case for you, so I was just lucky.