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Wire that's only hot when engine is running?

Discussion in '2nd Gen. Tacomas' started by memario1214, Apr 4, 2013.

  1. memario1214

    memario1214 [OP] Vivid Illumination Vendor

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    I am looking to tap into a wire under the hood that is only hot when the engine is running. I know that the foglight anytime mod comes pretty close, but I do not want the wire hot when I am in accessory mode (first click of the key). I could go prodding around, and will likely test it anyway, but I was just wondering if anyone knew off the top of their head.
     
    Last edited: Apr 4, 2013
  2. BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    I have had this question asked before from someone a while back. I cannot find and wire that is 12V hot only with engine running. The 12V hot wires are either Key off, key accessory, key on, key cranking.
     
  3. evanmb31

    evanmb31 Well-Known Member

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    The fuse i used is only hot on the second click when turning the key and when the engine is running, not hot on the first click, is that what you are looking for?
     
  4. memario1214

    memario1214 [OP] Vivid Illumination Vendor

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    Well there is one I know of... But it is in the cab. Blue wire with a yellow stripe front and center. I would really like to pull the power from under the hood though if I could.

    Much closer to what I am looking for yes :D watcha got for me?
     
  5. evanmb31

    evanmb31 Well-Known Member

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    Well i kinda skimmed through your post and didn't read the under the hood part lol, its in the fuse box behind the coin tray to left of the steering wheel, middle row 2nd one in from the left, i used it to power my switch for my LED light bar that is mounted exactly like yours :D, pictures to make it easier
    ImageUploadedByTapatalk1365109080.955712.jpg
     
  6. moondeath

    moondeath Plenty of slaves for my robot colony?

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    What did you use in that picture to tap into your fuse?
     
  7. evanmb31

    evanmb31 Well-Known Member

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    A mini fuse tap lol, or add a circuit it might be called, i am a complete wiring newb, i got some great pointers from a member on here
    [​IMG]
    Ran that to my switch, switch to a relay, then relay to my light
     
    Last edited: Apr 4, 2013
  8. moondeath

    moondeath Plenty of slaves for my robot colony?

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    Thats pretty nifty. Can't say that I've ever seen one of those before.
     
  9. BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    Interesting. Nice to know that there is a 12V hot with engine running power source. It's not live with just the key in the on position?
     
  10. memario1214

    memario1214 [OP] Vivid Illumination Vendor

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    I will make a video of my setup here soon enough, but the one I tapped (blue w/ yellow stripe) is in fact hot with the key in the on position... However, in my struggles to find a suitable wire I believe I have found one. I have the DTRL lights and there is a plug that goes into the flasher box, the one that actually makes the blinker click sound. Pin 10 comes hot about 2 seconds after the truck starts up and is not hot in the on position. It has to be the control for the DTRL, but it seems to be the only thing I could find... :notsure:
     
  11. wlmuncy

    wlmuncy Well-Known Member

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    Might I ask what you are planning to do? Seems interesting.
     
  12. Pugga

    Pugga Pasti-Dip Free Since 1983

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    You should be able to get them at any auto parts store for a couple bucks. If you use them, make sure you install them in the correct orientation, especially if you run a heavy load off of them.

    Also, I believe the picture Evan showed is the fuse panel in the dash, not under the hood. I was not able to find one under the hood that does what the OP is asking. I ended up using the A/C fan fuse under the hood since I always have my fan on anyways. Not exactly the best method, but it works.
     
  13. memario1214

    memario1214 [OP] Vivid Illumination Vendor

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    Keep an eye on my build... It will be updated in the next couple days :cool:

    Yeah I didn't find what I was looking for either under the hood. I did the foglight anytime while I was under there though lol. I ended up drawing from the panel that is in the cab for this project as well
     
  14. BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    Ah, Ok. The OP was talking about a hot wire only when the engine was actually RUNNING, as I understood it, not with it just on. Perhaps I misunderstood him.
     
  15. memario1214

    memario1214 [OP] Vivid Illumination Vendor

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    I am the OP... and that's what I was talking about. I changed my mind midway through
     
  16. evanmb31

    evanmb31 Well-Known Member

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    Its not live when the key is in the AAC position (first click) it is live in the on position (second click) so the fuse i used isnt really what the OP was looking for, just thought it might help.
     
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