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Thread: Brake Controller - Anyone installed on a JLU?

  1. #1
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    Brake Controller - Anyone installed on a JLU?

    Should get my ordered JLU Rubicon this Monday. I need to setup with a brake assist controller for my camper. Worried about placement and hookup. Any suggestions / recommendations?


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  2. #2
    That dude from Mississippi notnalc68's Avatar
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    Quote Originally Posted by Uglywon View Post
    Should get my ordered JLU Rubicon this Monday. I need to setup with a brake assist controller for my camper. Worried about placement and hookup. Any suggestions / recommendations?


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    I noticed they come from the factory, with a class 2 receiver. Are you using a class 2, or class 3?


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  3. #3
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    Quote Originally Posted by notnalc68 View Post
    I noticed they come from the factory, with a class 2 receiver. Are you using a class 2, or class 3?


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    Thanks for the reply. I’m using a Class 2 for an A-Liner under 2000 lbs.


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  4. #4
    Fresh Catch Cooknavy's Avatar
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    Brake Controller - Anyone installed on a JLU?

    I have the same problem. I’ve been looking at a Redarc tow pro. They run about $200 and when installed all you see is a small knob/button. The only thing I’m running into is getting the right adapter for the controller plug under the dash. I’ve checked with the dealer and they don’t know which plug is going too work with the JL. Ive found a pigtail that will plug in too the plug but haven’t found the drawing to make sure the pin order is correct.


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  5. #5
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    Did you folks ever find a solution for installing a break controller? I have the OEM tow package and it comes with an RV plug, just need to add brake controller for small teardrop with e brakes.

  6. #6
    Fresh Catch Cooknavy's Avatar
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    Brake Controller - Anyone installed on a JLU?

    So here is my set up
    2018 Rubicon JLU with a factory tow setup.
    I replaced the stock class 2 hitch with a class 3 Draw tite Stock number 75515.
    I used a Tekonsha 3014-p wire connector from the brake controller connection (gray plug above brake pedal) too connect to a Tekonsha P3 controller .

    I’m towing a 2019 ForestRiver E-Pro 19 FBS with a dry weight of about 3100lb.

    I also have a Fastway E2 6k weight distribution hitch too help keep it on the road.

    And yes the auto start turns off and the traction control disabled itself...I was told this is “normal”


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    Last edited by Cooknavy; 09-08-2018 at 03:54 PM.

  7. #7
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    How to prevent the warning lights when using a brake control

    THE DEFINITIVE SOLUTION to install brake control WITHOUT dash error lights
    To add a bit of credibility - I am a RVDA Certified Technician (camper mechanic) and work at the largest RV dealer in central Wisconsin. We install a TON of brake controls, and I have a strong electrical background and understanding. I own a 2019 JLUR with factory tow.

    From what I can tell NO ONE makes a brake control wiring harness for the 2018-2019 Jeep Wrangler (new body style) w/ factory tow pkg.

    Curt lists one (51458)– but I have confirmed that it is incorrectly pinned and will not work.

    The reason none of the existing harnesses will work is the same as the problem that plagued the 2013-2014 Dodge Ram 1500 trucks that took tekonsha 3 years to develop a harness that wouldn’t fry the truck computer… When manually operating the brake control – the controller will send voltage back into the dark side of the brake light switch to activate the vehicle and trailer brake lights. On a 13-14 RAM, the “switch” isnt a switch… it’s a computer. Send power into it where it doesn’t belong and you got a new stinky paperweight. The harness that tekonsha developed has a diode (check valve for electrical) in-line on the brake signal wire (red). This allows the vehicle to send power to activate the brake control, but prevents the brake control from sending power back to the vehicle to activate the lights on override.

    Several of you have found that the Tekonsha 3014 harness works! ...well, until your dash lit up like a Christmas tree...
    The 3014 harness has the correct plug and the correct pinout - that's why it works, but it is missing the diode that is required to block the brake control from sending voltage back into the computer.
    I have EVERY tekonsha quick harness in stock. I grabbed a 3014 and confirmed it to plug into my jeep. Then I pulled every harness with the correct vehicle side plugin and compared...

    My findings are;

    The 3014 harness is a direct fit – but does not have a diode.

    The 3021 harness fits – it needs the black and blue wires swapped and also does not have a diode.

    The 3023 harness will not fit as it has two separate connectors. (a separate connector is used for the brake signal wire)

    The 3024 harness fits – it needs the black and blue wires swapped and ALREADY HAS A DIODE INSTALLED!

    The 3065 harness fits – the whole pinout is messed up, it’s intended for a Ford. (the first four harnesses are all Chrysler)


    Coincidently, the “fit chart” for the Curt harness (51458) that is listed for the new wrangler matches the Tekonsha 3024 “fit chart”.

    I’m not a Curt fan - reasons are mostly based upon ethics with how they treat the retailers that handle their products... However, because they listed it as fitting the new JL, I contacted their dealer tech line and confirmed that the harness DOES have the required diode, and that the pinout of the vehicle plug DOES NOT MATCH their 51460 harness (same as the 3014 that "works" but messes with the dash lights). They published 51458 fit compatibility with the new JL without even confirming that it works!!!!!
    To give them credit - their tech that I spoke with was very polite and provided me with the pinouts and confirmation of the presence of a diode within the brake signal wire in an educated way. (not like at the auto parts counter when you ask for a 3157 headlamp and they ask you what kind of vehicle it is for...) He was also intrigued to hear my findings - we will see if they make an addendum to the fit guide that the black and blue pins have to be swapped for the new JL...

    Anyway, I have not seen a company that offers a DIRECT fit harness for the new wrangler (or even mentions making it work), so while we wait a couple years for the aftermarket to flip two wires and come up with a new part number, the rest of us can use the tekonsha 3024 harness and swap the black and blue wires. (bonus – if this harness is installed without swapping the wires, it will not cause any damage to the vehicle or controller, the controller just wont power up!)

    NOW, I must add that the diode DISABLES the ability for the brake controller to illuminate the brake lights on the vehicle and trailer under override. (only an issue when using the manual "slider" button on the brake control... typically only used to setup brake controller, testing trailer brakes, and in emergent situations)
    I don't want to get into legalities, so check with your own state... It is my understanding that in California (maybe some other states too) it is REQUIRED BY LAW that the brake lights illuminate any time ANY braking force is applied. If you travel through any state that has this requirement, an ADDITIONAL harness (30235) can be installed to add that functionality while maintaining the protection of the computer. The text right from Tekonshas part description "California Compliant - Our Brake Control Stop Light Adapter is designed for brake controls and/or vehicles that do not activate the stop lights on a trailer when the manual lever of the brake control is engaged. This is necessary in the state of California."

    Parts needed:
    Tekonsha Harness #3024
    Tekonsha Brake Light Kit #30235 (only required in states that require brake lights when using override)
    Proportional Brake Controller of Choice (do NOT get a timer based controller - they only to make you legal, they are not safe)

    If you made it all the way to the end - thanks! I can get a little long winded, but I am very analytical and detailed...

    If any of you ever need a brake controller installed for fear of modifying a harness - or need any camper related work, I am very proud of our dealership. We just had a couple guys finish their technician certification - We now have the most RVDA certified technicians at any single facility in the entire state! Not too bad for a little mom and pop shop! I am in the process of setting up a blog with technical how-to write-ups on RV related topics, a lot like this one! Check out our website if you are interested. www.greenewayrv.com

    Happy Jeeping!

  8. #8
    Fresh Catch jddk's Avatar
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    thanks for the detailed info! I run a 4 pin harness that doesnt have brakes and its all good. I will save your post if I upgrade trailers.

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  9. #9
    Fresh Catch Knowe's Avatar
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    No luck for me!

    I have tried both the Tekonsha Harness #3014 and #3024 (swapping the black and blue cables) with a Redarc Tow Pro Elite and with both harnesses I get the warning light on my dash. So for whatever reason I am still having the dash light issue on a 2018 JLU Rubican.

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