How do you set up a dual battery?

[ohmslaw]

I see the additional battery tray in the engine compartment and just got through installing a full line of Alpine products in my 07' Tahoe. I watch the volt meter when the stereo is played at a decent volume and I'm just at 12v. I would like to get my hands on a factory harness to add the additional battery anyone have any info on parts and install? Greatly appreciate any help..............

 

[Hardin Thicke]

Everything you need to know is right here: http://www.tahoeforum.com/showthread.php?t=2321&highlight=batteries

Also, if you do a search on "Dual Batteries", you'll get a bunch of hits.

 

[73shark]

Don't forget that the NBS alternator is computer controlled and won't show 14V all the time, only when req'd.

 

[petty]

You just have to put the battery in the boot. Then run a four gauge wire from the positive to the back battery. Take note that you need to use a split charger relay on the link as if it is kept connected while the car is not running and of course, the two battery will be discharged.

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[johnebgoode]

Why the need for a second battery....just curious

 

[norrislaketn]

To power extra accesories such as amps and camping equipment. It allows you to play and crank the engine istead of having to have a jump to get started.

 

[johnebgoode]

To power extra accesories such as amps and camping equipment. It allows you to play and crank the engine istead of having to have a jump to get started.

Get batteries with a high CCA rating. IMO the factory rating sucks.