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Trailer Brake Disconnect Error

Discussion in '3rd Gen Tundras (2014+)' started by DaveCar81, Jan 10, 2019.

  1. Jan 10, 2019 at 8:05 AM
    #1
    DaveCar81

    DaveCar81 [OP] New Member

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    Rough Country leveling kit, 20% tint
    Hey guys, new here. I have an '18 Tundra TRD. When I hitch up to my RV, it says "trailer disconnected" and the trailer brakes wont engage. I have taken it back to Toyo and they have replaced the brake controller module, no fix. They even tried to connect my RV to another new Tundra on the lot, same issue. Took the RV back to the dealer, all connections were tested and passed. They only time I notice that the trailer light comes on my dash and actually works the trailer brakes is when I am sitting still at a light or parked. Has anyone run into this issue or know what the fix for this is? I hate towing and not having trailer brakes. Thanks in advance!
     
    Biguntrd likes this.
  2. Jan 10, 2019 at 9:22 AM
    #2
    HTGreen

    HTGreen New Member

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    Long identified issue, do a search for all the threads. Toyota does not have a fix.
     
    Biguntrd likes this.
  3. Jan 10, 2019 at 9:25 AM
    #3
    Adriver71x

    Adriver71x New Member

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    Common problem with the OEM brake controller. Up grade to a P3 brake controller and plug and play wire harness. E-trailer is the cheapest and ESP sells a replacement replacement panel so you don't have to drill holes. Here is a picture of the set up.20181201_141752.jpg
     
    Biguntrd likes this.
  4. Jan 10, 2019 at 10:22 AM
    #4
    HTGreen

    HTGreen New Member

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    Don't believe plug-n-play available for 2018, unless they just released one.
     
    jtwags likes this.
  5. Jan 10, 2019 at 10:31 AM
    #5
    jtwags

    jtwags It's Crackled Bacon

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    I am waiting for 2018 plug and play harness too for P3. Havent seen one yet.
     
  6. Jan 10, 2019 at 10:53 AM
    #6
    Adriver71x

    Adriver71x New Member

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    I just tried to get on there website to check for you people but the website is down
     
  7. Jan 10, 2019 at 11:54 AM
    #7
    woodywoodward

    woodywoodward New Member

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    This is from Tekonsha

    Thank you for contacting Tech Support. I have attached a technical tip on hardwiring a brake control into a 2018 Tundra. Neither Toyota or Tekonsha will be making a plug in brake control harness for the 2018 tundra. The reason why, is that Toyota did something different with their connector, and we cannot get a brake light signal thru the harness. If I can be anymore help, please let me know.

    Danny Dunn
    Technical Service
    Horizon Global
    (888) 785-5832

    It will have to be hardwired.
     

    Attached Files:

  8. Feb 2, 2019 at 6:32 AM
    #8
    DaveCar81

    DaveCar81 [OP] New Member

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    @Adriver71x I already have a Tekonsha brake controller from when I had my Tacoma with harness. Where would I be able to connect the brake controller to my Tundra and bypass the integrated controller? Thanks in advance!
     
  9. Feb 2, 2019 at 8:01 AM
    #9
    Adriver71x

    Adriver71x New Member

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    I found out they don't make a plug and play wire harness for 2018. Woody Woodwood posted some info on this. Sorry I can't help you.
     
  10. Feb 6, 2019 at 11:38 AM
    #10
    BWinter

    BWinter New Member

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    On a previous thread about the same issue a member described a fix. He installed turn signal load resisters to the trailer brake output wires. The additional load current using these resisters allowed the Tundra to "see" the trailer brakes and remain connected.

    He seemed satisfied with the fix.
     
  11. Feb 6, 2019 at 11:50 AM
    #11
    TundraPro2019

    TundraPro2019 New Member

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    That sounds interesting. Do you have a link by any chance to that thread?

    Thanks!!
     
  12. Feb 7, 2019 at 7:30 AM
    #12
    pop's

    pop's 1794

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    TRD Rear Sway Bar, Bilstein 5100's ,Firestone Rear AirBags, TRD Front Skid Plate, N-Fab Podium Step, LED Conversion
    WHY WHY Would anyone mess with what works in 2017 and in 2018 :crapstorm: I'll tell ya why engineers or cost cutters that would be my guess. :boink:
     
  13. Feb 13, 2019 at 11:10 AM
    #13
    BWinter

    BWinter New Member

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    Last edited: Feb 19, 2019
  14. Feb 13, 2019 at 1:54 PM
    #14
    sbxx312

    sbxx312 New Member

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  15. Feb 19, 2019 at 3:18 PM
    #15
    BWinter

    BWinter New Member

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    Sorry link to thread did not load. I corrected and added the link in post number 13.
     
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  16. Feb 20, 2019 at 5:53 PM
    #16
    TundraPro2019

    TundraPro2019 New Member

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    Thanks for correcting the link!
     
  17. Feb 20, 2019 at 6:21 PM
    #17
    TundraTSS19

    TundraTSS19 New Member

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    2019 Tundra TSS SR5 Crewmax 4.6L
    Auxbeam NF-S1 H4 led headlights Auxbeam NF-S1 H11 led fog lights Reese Towpower brake controller LED step bar light strips
    I installed an aftermarket controller only 2019 Tundra 4.6L and it wasn't difficult at all. I used a tekonsha harness to make it easier even though you'll have to take the white plug housing apart bto separate the wires for I stlwlation but it's only 4 wires.

    20190107_210726.jpg
    20190107_210737.jpg
     

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