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I have a '99 Tahoe LT, 5.7L. It has a place for a second battery. I'd like to use it to drive a new audio system and use as a back-up for the other battery.
you can use the info above to do it...but its easy just get a selonoid and wire like this...
1 power from front battery thru solonoid to other battery then back to your amps
MAKE SURE YOU USE FUSES
2 make sure you ground the second battery to a good ground also......
3 wouldnt hurt to do the BIG 3 under the hood either.....
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