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Thread: Second Battery?

  1. #1

    Default Second Battery?

    I hav a 97 chevy 1500 5.7L n was wanting to know how hard it would be to install a second battery in the truck and if not to hard to DIY then what are the tools or supplies i will need for it. the reason i want to install a second battery is because i hav a sound system and its been draining my battery n im also wanting to install HIDs soon

  2. #2

    Default

    It's not hard to make a dual battery set up, but my question is are you draining the battery while the truck is running or while the engine is off and your running accessories, because that makes a huge difference in what you actually need.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  3. Likes reggiecab2000 liked this post
  4. #3
    Gas was $1.83 when Obama took office.....

  5. #4

    Default

    it has drained on me before while running especially at night one night i was driving at night with my system turned up n when i turned it off once i got to where i was going and i come back n it wouldnt crank as if the battery was almost completely dead? which was weird because it has not done this before but then again i had a different battery in it before

    - - - Updated - - -

    Quote Originally Posted by K15 Blazer Guy View Post
    wow yea just a bit over kill because i wont be running that many lights right know my tail lights r LEDs n so r my turning signals n hopefully soon i will be adding fog lights and LED third light and HIDs. So i figured with a dual battery set up i can be sure my battery doesnt die on me again n i can finally reconnect my sound system again

  6. #5

    Default

    You need a bigger alternator not two batteries.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  7. #6

    Default

    Quote Originally Posted by Conlan Rose View Post
    You need a bigger alternator not two batteries.
    I agree! Your truck should be able to charge the battery or at least keep it charged while it is running. If not then you need a bigger alternator. Maybe a 145 or 160 amp. Then I would do a duel battery setup with an isolator so when you are parked with the engine off the system will not kill both batteries. With the isolator the system will run off of one battery when the truck is not running, keeping one battery safe for starting your truck. When you start the truck the alternator will then charge both batteries. While you are doing the due battery setup I would buy a few more feet of cable and do the big three upgrade also.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  8. #7

    Default

    thanks. but if i get a bigger alternator would it be a bolt on or do i hav to mod it the one the truck has now is a 105 amp. also where can i get a good isolator? n if i do run the dual battery set up would i need to hav the same size battery or ? can they be different?

  9. #8

    Default

    Quote Originally Posted by 97Prieto View Post
    thanks. but if i get a bigger alternator would it be a bolt on or do i hav to mod it the one the truck has now is a 105 amp. also where can i get a good isolator? n if i do run the dual battery set up would i need to hav the same size battery or ? can they be different?
    The alternator will bolt right into the same place. Look on an autoparts site like autozone, advance, napa, look up your truck. They may list 2 or 3 different alternators available. a 105, 145, 160. If not look up a suburban for the same year. That should have a 145. Ideally, the batteries should be the same size

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  10. #9

    Default

    thanks. n by going to a bigger alternator wouldnt this somewhat solve the problem that im having with the battery draining cuz it would charge quicker? or will this still be somewhat of a prob

  11. #10

    Default

    It should help with the issue. Lets say If your current alternator is putting out 105 amps and with your system on and truck running you are using 115amps, then you are draining the battery rather than charging it. If you change the alternator to 145 amp, now you are putting out 30 amps more than you are using, therefor charging the battery. If you are using 190 amps then you better start looking for another solution.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

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