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2018+ Owners: Have any of you successfully installed a P3?

Discussion in 'Towing & Hauling' started by JaxSmith, Jan 15, 2019.

  1. Jan 15, 2019 at 7:48 PM
    #1
    JaxSmith

    JaxSmith [OP] New Member

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    I had been keeping an eye on the market, waiting for a 2018 harness to appear for brake controllers, but I hadn't seen one come up yet. The current harnesses are for 2017 and below, as best as I can tell.

    With that said, have any of you 2018+ owners managed to install a P3 or other 3rd party brake controller? If so, what did you end up doing (if you did it yourself) or where did you take it to get it done (if you took it elsewhere)? This is something that will be likely happening in my near future, as I have no interest in dealing with the actual IBC, so I'd love to hear some feedback from those who have already done this.

    Thanks!
     
  2. Jan 16, 2019 at 9:59 AM
    #2
    TundraRunner481

    TundraRunner481 Kinda New Kinda Not

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    Curious about this as well. I have the 5.7L with tow package. I've seen people with 18's and the 4.6L with no tow package wire them in. Wondering if anyone with a 5.7 and tow package have pulled this off and if so what wiring diagram did you use?
     
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  3. Mar 17, 2019 at 5:58 PM
    #3
    Mks99

    Mks99 New Member

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    tag.... I already have a P3 from my previous tow vehicle. Taking delivery of a Platinum this week. I've read all the previous IBC treads and have the same concerns. Interested to hear replies.
     
  4. Mar 23, 2019 at 6:19 AM
    #4
    Swampcreek

    Swampcreek New Member

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    20190323_103945.jpg I'm about to order a Tundra, after reading about the factory IBC problems I'm pulling my Redarc trailer brake controller off my Tacoma before trading it in. Don't know if I'll put a cheapie in its place or not, OR negotiate the trade without mentioning the controller and then after the agreement tell them about the controller and for $300 I'll leave it in (don't know if that's a good idea or not). The control knob is mounted through a previously empty switch blank so I can replace it with the spare blank I bought and the truck will simply be like it was before.
     
    Last edited: Mar 23, 2019
  5. Mar 23, 2019 at 7:04 AM
    #5
    TundraTSS19

    TundraTSS19 New Member

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    Auxbeam NF-S1 H4 led headlights Auxbeam NF-S1 H11 led fog lights Reese Towpower brake controller LED step bar light strips
    I've wired up my own brake controller on my 2019 4.6L with no problem. Also used the tekonsha harness. This is the one you need that has the extra ground cable. Since the wiring is already there for the 5.7 with tow package, it has to be even more simple to install a P3. If there is no brake sense on the factory harness, you can get that from the tan wire on the brake switch.

    REESE Towpower 8507111 Brakeman... https://www.amazon.com/dp/B017NAH5WK?ref=ppx_pop_mob_ap_share

    Tekonsha 3031-P Trailer Brake... https://www.amazon.com/dp/B0781KTCPT?ref=ppx_pop_mob_ap_share
     
  6. Apr 5, 2019 at 7:57 PM
    #6
    TacoWuzzaTurd

    TacoWuzzaTurd Loving my Tundra

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    My guess is they wont give you shit for it...aftermarket parts dont do dick for dealer value.
     
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  7. Apr 6, 2019 at 4:58 PM
    #7
    TacoWuzzaTurd

    TacoWuzzaTurd Loving my Tundra

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    I cant find a definitive answer on how to successfully install a P3 on a 2018 Tundra 5.7L with tow package (factory integrated brake controller). I see the question asked on ETrailer and one rep recommended the Curt harness, which he claims would plug into Toyota Factory Brake Controller plug, then just cut off the curt controller plug, hard wire that portion to the P3 Controller. This way you aren't cutting any factory wires. The curt adapter is only $25 so I may try this. https://www.etrailer.com/p-C51455.html

    Here is the etrailer Q&A expert answer link: https://www.etrailer.com/question.aspx?qid=325863

    Thoughts?
     
    Last edited: Apr 6, 2019
  8. Apr 20, 2019 at 9:23 PM
    #8
    Swampcreek

    Swampcreek New Member

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    It's already out, I replaced it with a timed
    I believe you are right, I also figure after talking to a few car salesmen they have no idea what the differences are in different brake controllers anyway so I pulled it and put an inexpensive timed Reese controller in the coin compartment. I used it last week with my 18' car trailer and Kubota BX-25 tractor and to tell the truth it really works well! I'll probably actively work on getting a Tundra in a few weeks after I take care of a few things.20190421_000803.jpg
     
  9. Apr 26, 2019 at 9:09 AM
    #9
    TacoWuzzaTurd

    TacoWuzzaTurd Loving my Tundra

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    Bump. Still looking for some feedback on this. I have a p3 sitting in my garage waiting to install into my 2018 but I am super reluctant to start hacking into my factory wiring. Any success stories out there? Tips or tricks?
     
  10. Jun 21, 2019 at 12:16 PM
    #10
    Gilk10180

    Gilk10180 New Member

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  11. Jun 21, 2019 at 1:19 PM
    #11
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    Last edited: Jun 21, 2019
  12. Jul 6, 2019 at 10:20 PM
    #12
    Peekay

    Peekay New Member

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    I have a 2018 with the 5.7 and Factory brake control. I tried to disconnect the brake control and then get the system to not recognize it (along with the multitude of error lights) by pulling the battery, which apparently works for the other years. I tried pulling the battery several times and it did not work. I even tried to pull it off overnight and there were still error messages in the morning. Basically, I cannot get the truck to forget about the factory brake controller.

    When I get home from my trip, I plan to wire in a Tekonsha by basically bypassing the stock brake control. Specifically, I plan to just pull my own 12 volt and negative, and then tap into the brake circuit to pull the brake sensor signal and then potentially run the break power cable directly to the back to the 7-pin ( after removing the factory brake control brake power cable from the 7-pin). Alternatively , I'm going to find where the factory brake control sends the wire for the brake power cable and then cut that and reroute it to my Tekonsha. Effectively, I think the truck will still think that the stock brake control is there in that it's just being unused. In reality my Tekonsha will have bypassed the stupid Factory controller.
     
  13. Jul 7, 2019 at 10:01 AM
    #13
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    You can do that if you want, but if you can find that applicable harness connector behind the passenger side kick panel (read thread referenced above), I think you can have a cleaner installation and save yourself from having to add exposed wire outside of the existing harness. All those troublesome IBT controller signals come from those small gage wires in that connector. Disconnect the Toyota IBT harness, use the blue and black heavy gage wires out of the harness connector, leave all those other little trouble-makers unused. Haven't done it, mine is 2017 4.6L, but from what I've read, that should work.

    @Peekay See this thread, post #33, for universal adapter harness for Tekonsha controller that will reach across to the passenger side kick panel:

    https://www.tundras.com/threads/2019-4-6-trailer-brake-control.48045/page-2#post-1252731
     
    Last edited: Jul 7, 2019
  14. Jul 8, 2019 at 7:13 AM
    #14
    Peekay

    Peekay New Member

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    Thanks for your response. But even if I remove the harness at the point you referenced, my truck is still going to think something is wrong because the brake controller is not attached.

    Fyi, after unplugging the harness at the top, the error message becomes "trailer brake error", instead of the trailer disconnected error that I used to have. So basically, if I unplug the stock control and try to install an aftermarket one, there's going to be errors. You think it will be different if I unplug at the point you referenced? Thanks again.
     
  15. Jul 8, 2019 at 9:44 AM
    #15
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    So, how do you think your Tundra knows it has a Toyota brake controller?

    On 4.6L Tundras 2018+, there is nothing plugged into that connector. That's true because 4.6L Tundras don't come with a factory brake controller. All of them have that connector, but none of them struggle with the idea that they might have a factory brake controller. Further, there are far more wires in that connector than a trailer brake controller needs.

    There's has to be some ECU/BCU logic (IF/THEN) utilizing a signal, maybe multiple signals, exclusive to the Toyota brake controller back to the computer controlling the dash display. When you pull the top connector, you are interrupting one of those signals but not all of them...the THEN logic proceeds to give you a message just as it would if you had a short or broken wire.

    If you are interested in saving some wire and work, simply remove the kick panel, find the connector and unplug it. If that stops all the bs messages from your factory brake controller, and doesn't eliminate any other essential functions (unlikely imo), then you've saved time, a little money, and won't have redundant wiring. Your truck, your controller, easy for you to check. If you do check it, and your Tundra has suddenly lost all memory of ever having a factory brake controller, please report back. If I'm wrong, you can berate me. ;)
     
  16. Jul 8, 2019 at 6:33 PM
    #16
    Jeepman50

    Jeepman50 New Member

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    JohnLakeman, I have a 2019 Tundra with a 4.6L, Can I just get a Tekonsha controller with adapter harness and just plug into the factory harness? Dealer said they wouldn't because of the cruise control radar w/automatic braking would mess up the sensor/ comp unit. Thanks for your input.
     
  17. Jul 8, 2019 at 8:24 PM
    #17
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    I suggest you contact Tekonsha Tech Service to ask if their controller will be in any way affected by the cruise control radar w/automatic braking (Tekonsha.com). You may be helped by Danny Dunn; sharp guy, helpful, knows his products.

    Personally, I can't see an aftermarket brake controller being affected by any of the Tundra systems. Electric brake controllers work by sensing the change in the inertia of the tow vehicle as the brakes are applied; i.e. a weighted pendulum swings forward inside the controller as the tow vehicle brakes are applied. This sends a proportional electrical signal to the trailer brakes. If your cruise radar brakes the truck, the Tekonsha won't care how the brakes are being applied, it will be applying the trailer brakes same as if you applied the brakes. When towing, it is foolish to follow the vehicle ahead so close that a safety system has to take over braking your vehicle; something to be planned for and avoided. But...your family's safety is at stake, so doing the due diligence on the Tekonsha is your responsibility.

    See this thread for Tekonsha P3 on a 2018 4.6L. I'm pretty sure the installation should be the same on your 2019.
    https://www.tundras.com/threads/2018-tundra-with-4-6-engine-trailer-brake-install.25884/#post-759708

    You'll need this universal harness:
    https://www.tekonsha.com/products/b...rsal-harness/TzaIxkVx1cKyqDc|dRuwxoSeHoYFUeAG
     
    Last edited: Jul 8, 2019
  18. Jul 8, 2019 at 11:24 PM
    #18
    Peekay

    Peekay New Member

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    Hi John, I tried to install the harness in the location you suggested but ran into some difficulty. Specifically, my cables in that area look different than the pic referenced in this thread. https://www.tundras.com/threads/2018-tundra-with-4-6-engine-trailer-brake-install.25884/#post-759708

    Instead, this is a pic of my area. None of the harnesses corresponded to the one referenced in that thread. Do you have any ideas which one it may be?

    I actually have the Tekonsha 3014 harness, which is very similar to the 3031-P one you have, except mine doesn't have a separate ground cable on the brake control side.

    Thank you.

    20190708_230805.jpg
     
  19. Jul 9, 2019 at 4:48 AM
    #19
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    https://www.tundras.com/threads/2018-tundra-with-4-6-engine-trailer-brake-install.25884/

    Look up high in the dash area on that side. Click twice on these pics to show the white connector and the wire configuration. Note there is a large black wire (12V+) and a blue wire (trailer brake).

    The Tekonsha #20160 universal harness is longer than either the 3014 or the 3031P. You'll need the 60" length for 2-3 wires to reach from right of the steering column to that location without splicing. Connect the Tekonsha 12V power wire to the Tundra black wire, and Tekonsha brake function wire to the blue wire. Tekonsha ground wire can be to any body metal on either side of the truck, but a short ground wire would be preferable. Others have connected the Tekonsha brake sense wire to a beige stop light switch wire and that worked. Tekonsha also has a tech tip bulletin for other locations to get the brake sense signal 2018+.
     
    Last edited: Jul 9, 2019
  20. Jul 11, 2019 at 3:24 PM
    #20
    Peekay

    Peekay New Member

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    I found the harness. Like you said, it's tucked up near the glove box, and not down low near the actual kick panel. It's connected to a box of some sort. I unplugged it, and then unplugged the battery overnight. The next morning, I started the truck up. There is a "collision detection system" error, or some words to that effect. Interestingly enough, the brake control options are now missing from the menus, but I cannot get rid of this error message. So it was worth a shot, but ultimately, it looks like I will just have to keep the stock controller and just bypass it.

    Also, FYI, but the 3031P harness does NOT fit this harness. Different pin locations (there are some flat bladed pins that do not fit the 3031P). I'm confident that I found the correct harness because it does have the prominent blue and black wires, and most of the thin-gauge wires match the colors on the pic in that other thread. Moreover, the brake control option was missing after I disconnected it. So it does seem to be the brake control harness.
     
  21. Jul 11, 2019 at 6:14 PM
    #21
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    FYI, I never expected the 3031P adapter harness to work. See my post you reference. I said you would have to use universal harness (#20160) to even reach that location. If you had read the entire thread (and the thread link I provided), you would know that for 2018+, THERE IS NO PLUG-N-PLAY for an aftermarket controller; you were ALWAYS going to have to hard wire it yourself.

    If it were me, I would see if the code could be cleared, either using an aftermarket scanner, Techstream, or have the dealer do it, before I gave up on eliminating the IBC. But, that's for you to decide. You could try disconnecting the battery again, that's worked for 2017, but you probably need professional help here.
     
    Last edited: Jul 11, 2019

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