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Fog Light Wiring help

Discussion in '3rd Gen. Tacomas (2016-2023)' started by spiced taco, Aug 6, 2022.

  1. Aug 6, 2022 at 3:14 PM
    #1
    spiced taco

    spiced taco [OP] Member

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    Good evening!

    I hope I am posting in the right place. Im new here. I am going to try to post as many pictures and links as possible so that maybe someone can help me. I have a 2022 Tacoma SR.

    So before I did anything I read through Nitoris OEM fog light install guide several times.

    https://www.tacomaworld.com/threads/nitoris-oem-sr-foglight-mod.451495/

    I purchased my own switch from Amazon this switch in particular.

    https://www.amazon.com/dp/B07WDVYCKL

    And I purchased some diode dynamics SS3’s with the backlights.

    I was pre wired so I opted to use taps to tap in to all of the wires I need. here is how it all looks. The switch instructions specifically say to hook both the white and green wire to the positive, red to the relay, and black to negative. See below

    0C685614-ADE2-46DA-9EC1-150469455A7D.jpg 9BA6FAED-2F6C-4287-8AE5-371462F15287.jpg

    The switch itself lights up so I assume I atleast did that part right but the fog lights dont turn on. Engine housing is connected to the relay and the fog lights are connected to the engine housing and the relay is plugged in to the fuse box all according to nitoris instructions. But still when I press the switch the fog lights dont turn on.

    5F05FC0B-647E-4A2A-8DC7-FE3DFF2DB9DD.jpg

    now, i dont have the fog lights back light wired up. I didnt want to tape in to the headlight wires and @Puppypunter has graciously offered to mail me some plug and play adapaters for the backlights.

    My question is why wont the fog lights turn on? Did I miss a step? Is it because the backlight isnt wired? Am I FUBAR?
     
    Last edited: Aug 6, 2022
  2. Aug 6, 2022 at 3:17 PM
    #2
    chazmen

    chazmen Well-Known Member

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    You can purchase DD Wire Harness

    dd4033_dual_light_duty_harness_diagram.jpg
     
  3. Aug 6, 2022 at 3:39 PM
    #3
    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    A few OE parts from fancy trucks
    Headlights on when you try?

    It's how OE wiring works, which sounds like you have used.
     
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  4. Aug 6, 2022 at 3:41 PM
    #4
    OMGitsme

    OMGitsme Well-Known Member

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  5. Aug 6, 2022 at 3:48 PM
    #5
    spiced taco

    spiced taco [OP] Member

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    yeah the headlights are working fine no problem.
     
  6. Aug 6, 2022 at 3:50 PM
    #6
    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    Not quite what I meant. OE fogs only work when low beams are on. So when you test fogs, do you turn on low beams first?
     
  7. Aug 6, 2022 at 3:51 PM
    #7
    316sherm

    316sherm Well-Known Member

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    This is exactly why I ended up just doing an aftermarket setup. Much easier and you can have fogs on whenever you want.
     
  8. Aug 6, 2022 at 3:54 PM
    #8
    spiced taco

    spiced taco [OP] Member

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    Oh yeah no not even when you flip to low beams do they turn on nor when you just turn your headlights off
     
  9. Aug 6, 2022 at 4:10 PM
    #9
    caribe makaira

    caribe makaira Well-Known Member

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    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    OP, you might be lucky that you haven't fried the MBECU, yet.
    Maybe this will help. Parking lights need to be on also for fogs to energize.
    upload_2022-8-6_19-9-30.jpg
    The Blue wire of the fogs needs to make ground via the switch.
     
  10. Aug 6, 2022 at 4:16 PM
    #10
    spiced taco

    spiced taco [OP] Member

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    i see, so green wire needs to be disconnected and grounded somewhere like the dash bolt?

    also how would i know if thats fried/damaged?
     
  11. Aug 6, 2022 at 4:22 PM
    #11
    caribe makaira

    caribe makaira Well-Known Member

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    Yes, or the white with black stripe on the cargo switch harness.

    When signs show up. (few or many)
     
  12. Aug 6, 2022 at 4:33 PM
    #12
    spiced taco

    spiced taco [OP] Member

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    Ok, ill have to stop by autozone tomorrow and pick up some ring terminals for that wire ill disconnect it for now.

    kind of concerned i messed up something really bad. What are the odds realistically somethings fried?
     
  13. Aug 6, 2022 at 4:38 PM
    #13
    caribe makaira

    caribe makaira Well-Known Member

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    Did you run out of T-taps?
     
  14. Aug 6, 2022 at 4:39 PM
    #14
    spiced taco

    spiced taco [OP] Member

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    Yeah im all out of them for now
     
  15. Aug 6, 2022 at 4:41 PM
    #15
    caribe makaira

    caribe makaira Well-Known Member

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    Since you are removing the switch, test it. Verify which wire needs fused power. Ground the black, then place power to the green without depressing the switch-verify no lights are on in the switch. You can use a 9vDC battery for the test.
    The reason for this to verify what type of switch it is:
    upload_2022-8-6_20-26-54.jpg
     
    Last edited: Aug 6, 2022
    eurowner likes this.
  16. Aug 6, 2022 at 4:44 PM
    #16
    caribe makaira

    caribe makaira Well-Known Member

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    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    You can also test the system for correct function by placing the fog blue wire to ground. Turn parking lights ON. If the fogs are installed they illuminate. (with engine ON)
     
  17. Aug 6, 2022 at 8:53 PM
    #17
    caribe makaira

    caribe makaira Well-Known Member

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  18. Aug 7, 2022 at 5:23 AM
    #18
    spiced taco

    spiced taco [OP] Member

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    So this diagram actually would say to connect the red wire to white stripe on the cargo light and green to wire 26?
     
  19. Aug 7, 2022 at 5:28 AM
    #19
    caribe makaira

    caribe makaira Well-Known Member

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    No, especially if you haven't tested the switch wiring.
     
  20. Aug 7, 2022 at 7:40 AM
    #20
    spiced taco

    spiced taco [OP] Member

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    Ok so this morning i tried this method, disconnected green wire, added a ring terminal and bolted it to the dash.

    parking lights on, engine on, still unable to turn on fog lights when depressing the switch.
    I tried testing it as you said and the red wire i believe is the one that needs fused power.

    This may be a dumb question but before i do any more cutting and terming of these wires should I put the truck in drive to activate the fogs? Will it work parked with parking lights on?
     

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