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Upgrade battery cables

Discussion in '2nd Gen Tundras (2007-2013)' started by RodC, Jun 3, 2020.

  1. Jun 3, 2020 at 3:01 PM
    #1
    RodC

    RodC [OP] New Member

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    I am trying to upgrade my battery cables to a heavier gauge. I was looking for how many cables, lengths, and lug size that will fit my alternator and grounds.
    I checked the manual and I looked online but couldn’t find any info.
    I tried following the lines but there is heavy loom and a “nest” and cannot tell where the wires go once under the alternator.
     
  2. Jun 4, 2020 at 2:04 PM
    #2
    blackdemon_tt

    blackdemon_tt Battery Slayer

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    That wiring harness loom will wrap around the engine block and will plug into the starter, and unless you have small hands you will have to remove the heat shields out and possibly the starter out as well... I'm not saying don't do it, I'm saying you will have to do some work to get it all out....
     
  3. Jun 4, 2020 at 2:21 PM
    #3
    smslavin

    smslavin Behind a lens...

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    Some stuff
    you need to look up the big 3/4 upgrade. i did it on my truck. here is some info...

    https://www.tundras.com/threads/big-3-4-wire-upgrade.10285/

    i didn't post much info when i did it to my truck but, there are a few pictures starting here.

    the cable from ce auto electric is the best i've ever used. i do not buy wire from anywhere else now.

    my only advice is to go slow and take your time. you will need to remove passenger front wheel to get access to the alternator. it is the worst part about the entire process. you will not need to pull the starter.
     
  4. Jun 4, 2020 at 2:40 PM
    #4
    blackdemon_tt

    blackdemon_tt Battery Slayer

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    Damn it Jim, got me looking at this too... LOL.. I've been researching some of this stuff to upgrade my car's wiring
     
    smslavin likes this.
  5. Apr 30, 2022 at 12:37 PM
    #5
    tbone75

    tbone75 New Member

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    Resurrecting old post, sorry. I ordered everything from "The big 3/4" upgrade post (nicely done), but I have an additional question. Actually, two. I ordered all 1/0 wiring and now I'm thinking I should send it back and get 2/0 in it's place (only 15.00 more)? Thoughts? Also, for those who have tackled this project how long did it take? My Tundy is my only vehicle an need to factor that in when planning. I was looking at an LActrical 300amp alternator on ebay ( https://www.amazon.com/dp/B07Z5FS6WV?_encoding=UTF8) I know it's no 600 DC alt but maybe it's better than stock. Any opinions would be much appreciated -Thanks!
    Oh also, I was thinking of doing the diode upgrade since I'm dropping in a ODYSSEY 31 battery, too.
     
    NueveTundra and Leo's first like this.
  6. Jan 8, 2023 at 12:21 PM
    #6
    mj7juice

    mj7juice New Member

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    Did you end of getting the High Output LActrical alternator? Was thinking of upgrading if it’s good to go. I ordered 1/0 big “3” upgrade wiring.
     
    W3agle likes this.
  7. Jan 9, 2023 at 2:01 PM
    #7
    tbone75

    tbone75 New Member

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    I did and it has been working flawlessly through 105 F summers and -20 F winter's. Look at doing the Big 4 NOT 3. Also, if using an AGM battery do yourself a favor and do the GM fuse/diode (I don't remember what it's refered to) Basically it steps the recharge voltage to 14ish so it fully charged the AGM.

    As far as the alternator I'd buy again no problem. Good luck
     
    W3agle and Leo's first like this.
  8. Jan 9, 2023 at 11:42 PM
    #8
    01collinp

    01collinp New Member

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    I just bought battery terminals from a toyota dealer, apparently the positive and negative are different, dont let them lie to you
     
  9. Jan 10, 2023 at 5:12 AM
    #9
    tbone75

    tbone75 New Member

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    Finished product


    IMG20220823180928.jpg
     
  10. Jan 10, 2023 at 8:02 AM
    #10
    mj7juice

    mj7juice New Member

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    That looks great!
     
    JCBerb likes this.
  11. Jan 11, 2023 at 9:36 AM
    #11
    Trident

    Trident New Member

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    I put these on my 2007, $26 total from fleabay:

    90982-05054
    90982-06024
     
  12. Jan 14, 2023 at 2:49 PM
    #12
    Truelifelover

    Truelifelover New Member

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    2 inch lift Mevotech TTX outer tie rods Mevotech Supreme inner tie and next are the control arms
    What is the GM FUSE/DIODE and why?
     
  13. Jan 14, 2023 at 6:12 PM
    #13
    PhotoNerd

    PhotoNerd New Member

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    WVI and Truelifelover[QUOTED] like this.
  14. Jan 14, 2023 at 6:25 PM
    #14
    Truelifelover

    Truelifelover New Member

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    2 inch lift Mevotech TTX outer tie rods Mevotech Supreme inner tie and next are the control arms
  15. Jan 14, 2023 at 6:57 PM
    #15
    Dawoofles

    Dawoofles New Member

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    Stock battery tray?
     

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