Hooking Up A Battery In The Trunk Plz Help

[jonny 10+ year member]

Hi there i will be hooking up a yellow optima battery (900 amps) in my trunk i was wondering how i do the wiring could you ppls help me out thank you very much.

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[937DYTBOI 5,000+ posts]

run a 2 or 0 guage from the front batt to the rear batt for the positive . Ground the rear batt wit the same size wire to the chassis in the rear

 

[nVRuckus 5,000+ posts]

unless your battery in the front is the same battery, you want to get a battery isolator. run a cable from the alternator to the isolator and the isolator a cable to each battery positive.

 

[SPL140.2 5,000+ posts]

unless your battery in the front is the same battery, you want to get a battery isolator. run a cable from the alternator to the isolator and the isolator a cable to each battery positive.

unless your into spl competition that dont use the isolator, youll lose precious volts

 

[iceteebone 5,000+ posts]

first off, do you have a big enough alt and has the big 3 been done? what amps are you running? are you having electrical problems now?

 

[jonny 10+ year member]

hey i got the stock alternator and stock battery im driving a 2000 hyundai accent i got a 800.1 mon block amp of phoenix gold and im running four 10" woofers also phoenix gold octane r. I would like to keep the battery thats in there for now and power up a yellow optima battery in the back seat and possible to upgrade my alternator.

 

[Leeiswho2b 10+ year member]

hey i got the stock alternator and stock battery im driving a 2000 hyundai accent i got a 800.1 mon block amp of phoenix gold and im running four 10" woofers also phoenix gold octane r. I would like to keep the battery thats in there for now and power up a yellow optima battery in the back seat and possible to upgrade my alternator.

Honestly, I think you would be fine with the Big 3 upgrade. With PG 800.1, really don't think I'd waste my time on 2nd battery unless you plan an upgrade in near future. But anyways, I ran a yellowtop to my trunk. Used 0 gauge from (+) positive terminal of starting battery to (+) positive terminal of yellow top. O guage from neg terminal (-) of yellowtop to chassis ground (make sure bare metal). Didn't use an isolator, but did fuse it with 100A fuse. Haven't had any issues with one draining the other. Blew my 100A fuse the other day, bout it. Extra battery really isn't gonna help that much without upgrading alternator. It will just put more strain on your stock charging system.

 

[jonny 10+ year member]

yeah i hear you but im selling off the phoenix golds this summer and i plan on buying a 2500.1 kicker amp and 2 jl W 7's 12 inch subs lol so i think ill need an extra battery anyways lol.

 

[jonny 10+ year member]

I was told i can use my o gauge woring kit (thats comming in the mail soon) and wire it to an isolater if tahts how u spell it and id be able to hook up both batterys is that correct. lmk thank you