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Positive Battery Terminal Repair

Discussion in '2nd Gen. Tacomas (2005-2015)' started by SWPrRnr13, Jul 27, 2022.

  1. Jul 27, 2022 at 7:16 PM
    #1
    SWPrRnr13

    SWPrRnr13 [OP] New Member

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    Hi All!

    My positive battery terminal has completely corroded, fallen apart, and died. In looking online, I see a lot of mixed messages on how to best address the issue. Does anyone have any suggestions on how to replace the terminal without replacing the entire battery harness?

    Thanks!

    *Note: I love my truck, but I'm a novice as best.*
     
  2. Jul 27, 2022 at 7:20 PM
    #2
    mtb_taco

    mtb_taco Well-Known Member

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  3. Jul 27, 2022 at 7:23 PM
    #3
    Clearwater Bill

    Clearwater Bill Sometimes when I close my eyes, I can't see.

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    You can install a new end. That assumes that you still have cable that can be cleaned up enough to attach it to and have enough length to fit the battery properly. You'll know pretty quick when you take it apart.
     
  4. Jul 27, 2022 at 7:25 PM
    #4
    Waasheem

    Waasheem The catholic radio bear

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  5. Jul 27, 2022 at 7:27 PM
    #5
    knayrb

    knayrb Well-Known Member

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    Called a marine clip. Cut off the old end, strip the sheathing about 1/2 inch. Soak it in baking soda. Rinse and dry. Apply a generous amount of dielectric grease. Clamp on marine clip and you’re good to go.
     
  6. Jul 27, 2022 at 7:29 PM
    #6
    Waasheem

    Waasheem The catholic radio bear

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    For the replacement terminals, there’s multiple choices, most are good, some suck. The ones that use two little bolts and a metal bar to squeeze the cable, those suck.
     
    b_r_o likes this.
  7. Jul 27, 2022 at 7:37 PM
    #7
    SWPrRnr13

    SWPrRnr13 [OP] New Member

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    Here’s the terminal…I did have to cut it off from the battery cable because the corrosion was so bad.

    47BD1766-1D6B-4FA9-82D7-A137035547E1.jpg
     
  8. Jul 27, 2022 at 9:05 PM
    #8
    TnShooter

    TnShooter The TacomaWorld Stray

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  9. Jul 27, 2022 at 9:05 PM
    #9
    b_r_o

    b_r_o Mr Creosote

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    Yikes. Might have to whack the cable off farther down the line. Then you're stuck trying to pull the cable up close to the battery and use a shitty universal clamp terminal like washeem mentioned. There's universal positive cable assemblies available at OReilly that come with 6-8 inches of cable.. but the terminal clamps that come with those are always pretty dinky

    If you can separate the cable from the terminal where the bolt is and clean it up good, a proper toyota style clamp might work

    If you like the truck and want to take care of it, consider putting some money into an entire OEM cable assembly. It'll fit perfectly and last as long as the original one
     
    Last edited: Jul 27, 2022
    SWPrRnr13[QUOTED][OP] likes this.
  10. Jul 28, 2022 at 10:27 AM
    #10
    wi_taco

    wi_taco I've got a hunger only tacos can stop

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    Bivouac and b_r_o[QUOTED] like this.
  11. Jul 28, 2022 at 10:28 AM
    #11
    tirediron

    tirediron Well-Known Member

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    :eek: Da'fuq??????????????????
     
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  12. Jul 28, 2022 at 10:38 AM
    #12
    Nordberge

    Nordberge Well-Known Member

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    Also maybe invest in some battery terminal washers. I live on the West Coast USA and I have had no signs of corrosion for 5 years. I used to have to clean the terminals a few times a year.
     
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  13. Jul 28, 2022 at 10:55 AM
    #13
    gotoman1969

    gotoman1969 Well-Known Member

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    Holy moly!!! Have you ever cleaned the terminals?!
     
  14. Jul 28, 2022 at 11:01 AM
    #14
    windsor

    windsor Just a guy

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    Time for a cable upgrade. Cables will have corrosion inside them that you can't clean off.
     
    Too Stroked, jackn7 and wi_taco like this.
  15. Jul 28, 2022 at 11:08 AM
    #15
    Bivouac

    Bivouac Well-Known Member

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    If your terminals were that bad I would replace the cables as well.

    I use Marine Terminals on everything I have been making Battery cables for a very long time.

    I tend to add things like that to my McMaster- Carr orders they were less then $5.00 each.
     
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  16. Jul 28, 2022 at 6:27 PM
    #16
    Chuy

    Chuy Well-Known Member

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    The cheap way is a $3 universal terminal. A better way is using a butt connector, but you need a crimper and heat shrink tubing. If you are in San Diego area, I can do this for you. When I added my second battery, I went overboard and ended up with lots of extra wiring, butt plugs, cable ends, shrink tubing, and terminals. Bring craft beer, and we’ll call it even.

    BBE998EC-38B6-4E20-BD16-09334E7874C4.jpg 4DE790B2-A328-47FF-B40C-E708A74EF176.jpg
     
  17. Jul 28, 2022 at 6:32 PM
    #17
    joeyv141

    joeyv141 Well-Known Member

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  18. Jul 28, 2022 at 9:01 PM
    #18
    Chuy

    Chuy Well-Known Member

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    While I like the concept of a quick release, I don't like how the starter wire connects to the terminal - same as the cheap universal terminal above. And no terminal cover?
     
  19. Jul 28, 2022 at 10:57 PM
    #19
    guyofnowords

    guyofnowords Well-Known Member

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    I had the same exact thing happened to mine... the worker at Orielly's said this happens a lot to Toyota's battery terminals. It's so hard to remove when it's corroded, and the only way to remove them is to basically cut them.

    Also, make sure to use CRC battery cleaner to clean the terminal post and the wires... the battery cleaner has a color indicator... so if you spray it on, and it turns pink, then there is battery corrosion on it. This just makes it easier to clean.

    But yeah, if you strip off the wire insulator, you will see that the corrosion is eating up the wire as well. This happened to both of my negative and positive wires and battery terminals.
     
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