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Add A Circuit Question

Discussion in 'General Tundra Discussion' started by Davidlspearman, Jul 16, 2018.

  1. Jul 16, 2018 at 11:34 AM
    #1
    Davidlspearman

    Davidlspearman [OP] New Member

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    I am planning on adding a few things and wanted to tap into the fuse box both inside the cabin and outside (under hood) one as well. So here’s what I think I need in the pic below. I purchased it this morning and I didn’t have time to take the covers off to dbl check size and type of fuse. I did google it and it seems there’s a lot of different answers depending on year of truck and all. I have a 2016 Tundra Double Cab MGM. Will this work and if it will am I going to be able to get the lid / cover back on. Also I’m planning on adding the following items and any suggestions on products that would help or simplify the wiring and work long term would be great. Thanks !

    Alpine Powered sub Pwe-S8 (if anyone has one of these in their double Cab please send me pics of locations and wiring options)

    30” LED Bar - Lower Bumper

    Toyota Bed Light Kit

    Rear backup lights or a combo brake light / reverse light Bar

    KC Highlights Cyclone Underhood Light.

    upload_2018-7-16_13-34-54.jpg
     
  2. Jul 16, 2018 at 11:38 AM
    #2
    ToyotaTundraMike

    ToyotaTundraMike Not A New Member

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    Can’t remember which one you need in the cab but under the hood of mine required a “low profile mini add a circuit”.
     
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  3. Jul 16, 2018 at 11:44 AM
    #3
    BuckWallace

    BuckWallace Ball don't lie.

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    I just "hardwired" a dash camand used this add-a-fuse, which looks like the same type as yours:

    FAST Shipping ADD CIRCUIT BLADE STYLE APS ATT LOW PROFILE MINI FUSETAP FUSE TAP + 5AMP FUSE https://www.amazon.com/dp/B00I0MWPXU/ref=cm_sw_r_cp_apa_5AotBbGDSGTGV

    You will not be able to put the cover back on the fuse box in the cab. Just make sure you put it in the correct direction. It will "work" both ways once you have the new fuse and original fuse in, but only one direction will actually protect the circuit on the new added accessory.
     
    Davidlspearman [OP] likes this.
  4. Jul 16, 2018 at 11:45 AM
    #4
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    Yes, you can use an Add-a-circuit in either fuse box location. If you are tapping a fuse in the under hood fuse box. be sure to file out a space, on the back side of the fuse box, for the wire to go through without getting pinched. Just notch out the lip of the stationary (lower) part of the box so that the upper part will reinstall.
     
  5. Jul 16, 2018 at 11:50 AM
    #5
    Davidlspearman

    Davidlspearman [OP] New Member

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    So if I want to add a fuse in the cabin fuse box, I won’t be able to reinstall the cover? That kinda sucks.
    Someone told me that when I run a wire theubthe firewall that all I need to do is take a razor blade to the left of the nipple on the main blood on make a small incision and then I can feed the wires thru. Any tips or thoughts?
     
  6. Jul 16, 2018 at 11:50 AM
    #6
    DividedSky

    DividedSky New Member

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    The ATM - "LP" shown is the mini -Low Profile you are referencing.
     
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  7. Jul 16, 2018 at 11:51 AM
    #7
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    Oh, and I wouldn't worry too much about an Add-a-Circuit tap, used in the in-cab fuse box, keeping you from putting the cover back on. A lot of cars are now produced with no cover on the in-cab fuse box. My wife's Honda CR-V doesn't have a cover...
     
  8. Jul 16, 2018 at 11:55 AM
    #8
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    Yes, you just need to cut the large rubber grommet a little to get your wire in. I use a wire insertion tool when I have to route a wire through the firewall. The tool has a hollow channel from the end of the handle through the pointed end. You just insert the pointed end through the grommet, push the wire through the handle into the cab, tie it off to the bottom of the steering wheel, and pull the tool back out. Leaves the wire in place and you are good to go.

    Here is a picture of the tool. Some folks use a coat hanger, etc. to get the wire through...

    [​IMG]
     
  9. Jul 16, 2018 at 11:57 AM
    #9
    Davidlspearman

    Davidlspearman [OP] New Member

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    The cover missing is a huge deal breaker if it means protecting the electrical system and add on’s from shorting out stuff. I just wanted to make sure I purchased the correct stuff. The only downside I guess to not being able to keep the lid on is the “fuse map” printed on the cover. I assume I can always look online or the Owners Manual.
     
  10. Jul 16, 2018 at 12:00 PM
    #10
    Davidlspearman

    Davidlspearman [OP] New Member

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    That’s a awesome tool. I’ve never seen one of those before. I want to make sure I do the best job possible cause I’m pretty OCD w stuff and having the right tools makes a huge difference in how stuff turns out.
     
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  11. Jul 16, 2018 at 12:02 PM
    #11
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    The in-cab fuse box is already pretty well protected just by it's location. It would be hard to inadvertently get something up and in there to do anything. Plus, the exposed fuses only have a tiny, recessed, piece of metal on the back side of them that anything could get up against. I am very particular about my truck and I have not had my in-cab fuse box cover on for a couple of years now. I wouldn't worry too much about that. I just keep my cover in the glove box or console to use as a reference when needed. Just my $.02's...
     
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  12. Jul 16, 2018 at 12:29 PM
    #12
    Davidlspearman

    Davidlspearman [OP] New Member

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  13. Jul 16, 2018 at 12:38 PM
    #13
    wmchaseb

    wmchaseb New Member

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    care to explain how you know if it is put in the correct way?
     
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  14. Jul 16, 2018 at 1:00 PM
    #14
    BuckWallace

    BuckWallace Ball don't lie.

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    Per the instructions on mine, the prong opposite the wire side should go in the "hot" side of the fuse socket. You can test which side is hot with a multimeter.
     
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  15. Jul 16, 2018 at 1:54 PM
    #15
    PMG

    PMG New Member

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    You can tape the cover back on if you really want to... It's out of reach and mine has been uncovered for almost 2 years.
     
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  16. Jul 16, 2018 at 2:46 PM
    #16
    nk1794

    nk1794 Always torque to spec

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    That's a great little tool. I have to get one.
     
  17. Jul 16, 2018 at 4:33 PM
    #17
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    I got mine from Ebay and I got a set of two. One that allows you to pass through thinner (higher gauge) wire and one for thicker (lower gauge) wire. You probably don't need but one tool but never hurts to be prepared.
     
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  18. Jul 16, 2018 at 4:35 PM
    #18
    nk1794

    nk1794 Always torque to spec

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  19. Jul 16, 2018 at 4:45 PM
    #19
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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  20. Jul 16, 2018 at 4:58 PM
    #20
    big_jarv

    big_jarv New Member

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    Didn’t know such a tool existed!
    Thank you for sharing!
     
  21. Jul 16, 2018 at 4:58 PM
    #21
    NewImprovedRon

    NewImprovedRon Hey! Get off my grass!

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    You bet!
     
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