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Old June 19th, 2017, 09:02 AM   #1
Sandals
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Default Trailer Brake Controller

Looking to install a trailer brake controller in my JKU (already have a Tekonsha P3 and extra harness).

It has the factory tow package, with 7 pin connector.
All the wires are connected to it, but i haven't had any luck finding anywhere online that has good locations to tap into the wires for a brake controller.

Maybe my goole-fu is failing. But if anyone has done this, any tips are appreciated to save me some aggrevation.


Thanks!
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Old June 19th, 2017, 09:46 AM   #2
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well if you have the trailer prep and factory harness. I would assume it would work like any other vehicle that is prepped without a factory controller. Need a harness that would plug in the mbec under dash. Being a new vehicle you shouldn't need to hack into the wiring to get it to work.
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Old June 19th, 2017, 11:07 AM   #3
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well if you have the trailer prep and factory harness. I would assume it would work like any other vehicle that is prepped without a factory controller. Need a harness that would plug in the mbec under dash. Being a new vehicle you shouldn't need to hack into the wiring to get it to work.


Yes, that is my hope, but looking for someone that has done it that can tell me where it is.

A cursory look didn't show anything.
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Old June 19th, 2017, 12:46 PM   #4
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JK's don't have a plug and play harness, at least they didn't 6 years ago. The Mopar harness had me cutting and slicing all over under the dash.
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Old June 19th, 2017, 12:50 PM   #5
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JK's don't have a plug and play harness, at least they didn't 6 years ago. The Mopar harness had me cutting and slicing all over under the dash.

I'm hoping there was at least the brake controller wire somewhere in the engine bay or under the dash.
The rest of the install is easy since I already have 12v hot power into the cab for other stuff I can tap into, and getting the brake signal isn't hard. Would just rather not have to run a wire from the cab back to the connector, especially since it has the 7-pin from the factory.
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Old June 19th, 2017, 12:54 PM   #6
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I recall running one the entire length of the tub, it was borderline idiotic.
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Old June 20th, 2017, 05:55 AM   #7
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What year JKU. My '11 was plug and play. The connector was to the right of the steering column. Make sure you have the harness/pigtail for the JKU. Might be worth it to go to a dealer that installs them and ask how much to install it, they can also check the operation after install to make sure it works. I think my dealer charged me 1 hours labor to install mine.
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Old June 20th, 2017, 08:08 AM   #8
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What year JKU. My '11 was plug and play. The connector was to the right of the steering column. Make sure you have the harness/pigtail for the JKU. Might be worth it to go to a dealer that installs them and ask how much to install it, they can also check the operation after install to make sure it works. I think my dealer charged me 1 hours labor to install mine.
2008

I've installed about 7 others into other vehicles, not going to go throw money at the dealer.
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Old June 20th, 2017, 05:07 PM   #9
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Quote:
Originally Posted by Sandals View Post
I'm hoping there was at least the brake controller wire somewhere in the engine bay or under the dash.
The rest of the install is easy since I already have 12v hot power into the cab for other stuff I can tap into, and getting the brake signal isn't hard. Would just rather not have to run a wire from the cab back to the connector, especially since it has the 7-pin from the factory.
Granted, I don't a JKU or JK for that matter, but in my searches of finding the wiring for a WK brake controller, I found that the JK Is similar.

There should be a green or blue wire behind the kick panel fuse box on the bottom left of the drivers side dash, it will be just hanging out. That is the power wire for the blue wire on the brake controler. Wire that to the blue wire on the controller and have at it the rest of the way.

Disclaimer- That is just other people talking about their JKU. Have not had first hand experience
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