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ARB Twin Compressor (CKMTA12) Wiring

Discussion in '3rd Gen. Tacomas (2016+)' started by shacol, Jan 27, 2020.

  1. Jan 27, 2020 at 6:04 AM
    #1
    shacol

    shacol [OP] Well-Known Member

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    Hello Everyone,

    I am hoping for some advice/confirmation that I am on the right track.
    I am trying to sort out wiring a CKMTA12 as simply as possible.

    I'd like to have a simple switch (no illumation) right next to the compressor under the hood. I also don't plan to have it switched by the ignition, meaning it'll come on with just my simple switch. I plan to have the QD and switch side by side, so I'll need to open the hood to use the QD and will just operate the switch at that time. I also know that it isn't recommended to use the compressor with the battery off, and I don't plan to, but I'll just manage that myself.

    I have attached a pic of the wiring diagram, with the modifications that I *think* will work.
    ckmta12 5.jpg

    Any thoughts?
    Thank you!

    PS - I don't have air lockers...
     
    Last edited: Jan 27, 2020
  2. Jan 27, 2020 at 6:59 AM
    #2
    shacol

    shacol [OP] Well-Known Member

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    Well, shoot, that is even simpler than what I thought!

    Did you do this yourself? Or, is it just evident from the wiring diagram?
     
    Last edited: Jan 27, 2020
  3. Jan 27, 2020 at 3:51 PM
    #3
    caribe makaira

    caribe makaira Well-Known Member

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    Evident...
     
  4. Jan 27, 2020 at 4:00 PM
    #4
    shacol

    shacol [OP] Well-Known Member

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    gotcha, thank you very much!
     
  5. Jan 27, 2020 at 6:10 PM
    #5
    shacol

    shacol [OP] Well-Known Member

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    That makes sense.

    But since that's the case, your first diagram of just wiring the purple and black to a switch is the simplest ... I think I'll go that route.

    I very much appreciate you taking time time to help me out!
     
  6. Jan 27, 2020 at 6:12 PM
    #6
    caribe makaira

    caribe makaira Well-Known Member

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    No problem...:hattip:
     
  7. Jan 28, 2020 at 4:47 AM
    #7
    shacol

    shacol [OP] Well-Known Member

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    Sorry to bug you with this again, but I do have one other question.

    I noticed on the diagram that I first posted, one of the switches - the isolation switch - is tied to 12v(ignition).

    I am in no way saying that your diagram is incorrect, I just wanted to point that out in case you missed it. Is that a valuable clue or no? Just do it as you described originally?

    I don't care about it being switched by the ignition, but it made me wonder if I needed to pick up 12v somewhere for the other side of the switch...
     
    Last edited: Jan 28, 2020
  8. Jan 28, 2020 at 5:38 AM
    #8
    caribe makaira

    caribe makaira Well-Known Member

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    Yeah I missed that.:(
    You'll need power to the PURPLE. 8 amps is mentioned in the install instructions but I think that is for when all 3 switches are used. So 8/3= 2.333. I say get a 3A fuse, if it fails then up to 5. The switch you use must handle the 8+ amps just to be within specs...The ARB ones are Carling types, they are 20 amps.
     
  9. Jan 28, 2020 at 6:15 AM
    #9
    caribe makaira

    caribe makaira Well-Known Member

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    You can also do this:
    upload_2020-1-28_10-15-16.jpg
     
  10. Jan 28, 2020 at 6:19 AM
    #10
    shacol

    shacol [OP] Well-Known Member

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    Ahh, ok then!

    So, it'll be like my first diagram, but you recommend a fuse 3A (or up to 5A) on the purple line next to the battery.

    Here is a new diagram just to be sure that I have it correct.

    Again, THANK YOU!

    ckmta12 5.jpg
     
  11. Jan 28, 2020 at 6:21 AM
    #11
    shacol

    shacol [OP] Well-Known Member

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    Ahh, gotcha, I was making a reply when you posted this... this is also workable for me! Thanks for the option!
     
  12. Jan 28, 2020 at 6:22 AM
    #12
    caribe makaira

    caribe makaira Well-Known Member

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  13. Feb 9, 2020 at 9:52 AM
    #13
    shacol

    shacol [OP] Well-Known Member

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  14. Feb 9, 2020 at 9:54 AM
    #14
    caribe makaira

    caribe makaira Well-Known Member

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    :hattip:
     
  15. May 27, 2020 at 1:20 PM
    #15
    Bertw192

    Bertw192 Well-Known Member

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    Can you post pictures of the completed install? I'm in the same boat as you. I want onboard air (tire fill ups), but don't see the point of running a switch into the cab.

    Thanks in advanced.
     
  16. May 27, 2020 at 1:48 PM
    #16
    shacol

    shacol [OP] Well-Known Member

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    @Bertw192 Yes, happy to do so, give me a couple of hours and I'll get you some pics.
     
  17. May 27, 2020 at 1:55 PM
    #17
    shacol

    shacol [OP] Well-Known Member

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    IMG_20200527_165230.jpg IMG_20200527_165324.jpg
     
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  18. May 27, 2020 at 2:00 PM
    #18
    Bertw192

    Bertw192 Well-Known Member

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    That's super clean! Ok... time for all of the questions...

    What mount is that?

    In your wiring diagram (post #10), you're proposing an engine bay mounted switch. Is that the switch in your photo (black with yellow font)?

    I'm sure more questions to follow.

    Thanks again!
     
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  19. May 27, 2020 at 2:10 PM
    #19
    shacol

    shacol [OP] Well-Known Member

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  20. May 27, 2020 at 4:10 PM
    #20
    ShimStack

    ShimStack Well-Known Member

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    I'm not running the dual setup, just the single but I don't think switching black in connector 2 will work. Black in connector 2 is coming from ground connection in connector 1 to complete circuits on air solenoids (high side switched) and the switch backlights. So switching ground on 2 won't do anything here and as soon as purple gets 12V the compressor will run due to the relay coil being connected to ground via connector 1.
     

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