2017 factory brake controller

Discussion in '3rd Gen - 2007 - 2017' started by Char17EL, Jul 1, 2018.

  1. Langer

    Langer Active Member

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    The blue wire is back there capped, you’ll have to splice into the reverse light wire from the tail light, and run a wire from the large orange wire in the engine bay above the driver’s side wheel back to get 12v accessory power.

    Read through this:https://www.expeditionforum.com/threads/4-prong-to-7-prong.32359/

    I just finished up this project 2 weeks ago and did it exactly this way with the positap.
     
  2. Expy00

    Expy00 Member

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    You can install and connect any standard 7-pin adapter. The Inked20190603_081817_LI.jpg Inked20190603_082212_LI.jpg brake wire (on my '17 EL, anyway) was a foot or so from the existing 4-pin in that wiring harness on the driver's side.

    You will also want to add a fused charging line. I could not find that one in the existing harness.
     
  3. Expy00

    Expy00 Member

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    I thought the Orange wire on Left wheel well might be the correct one for the 12v power but could not locate it in the fuse/relay box.

    Do you have the fuse/relay location?
     
  4. HandyAZ

    HandyAZ Member

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    This thread has been great. I have the OBDII adapter on it's way from Amazon and my Expedition (2017 EL XLT) is in transit from California. I purchased the factory trailer brake and a 7 PIN adapter as well as the black wire and circuit breaker to run from the battery to the 12V pin of 7 PIN. Here is my question... FORScan... Never used before, I have downloaded it and ready to use when the vehicle arrives. Do I need an extended license to change the code found on line 42 and 43 of the Google Sheet to enable the trailer brake and gain or just the standard license that comes with the download?brake? https://docs.google.com/spreadsheet...TKARDo2Y7lfSOMFj6Gott8g7yg/edit#gid=756156726
     
  5. HandyAZ

    HandyAZ Member

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    Your photos are great! Thank you. I will see what happens when my vehicle arrives.
     
  6. HandyAZ

    HandyAZ Member

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    Is the first photo a picture of the fused line you ran back to the back for 12V power or the blue wire for the trailer brake? What is it connected to in the fuse box? I was going to do a similar thing but put it from the positive side of the battery with a fuse/40 amp circuit breaker but your location in the fuse box looks very clean.
     
  7. chuck s

    chuck s Full Access Members

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    Unless Ford used a separate model fuse box for the HD Tow optioned trucks all the connections, fuses, and relays should be under the hood on top of the radiator. You may have to put the relays and fuses in place. No direct connections, everything runs thru a relay.

    You'll also have to activate the brake controller in the car's computer using Forscan and your laptop.

    -- Chuck
     
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  8. Langer

    Langer Active Member

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    Sorry for the delay, been on vacation. If you haven’t found it, someone posted this on another thread:

     
  9. HandyAZ

    HandyAZ Member

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    Ok so here is my experience. Bought a 2017 Expedition EL XLT that had a Class IV hitch but no 7 PIN and no trans cooler or HD radiator. I needed to pull my Jeep up to the mountains so when I took delivery I had all of the parts I needed to do the install. Here's what I did.

    Parts:

    This shows the cubby removed with the factory harness hooked to the back.

    IMG_1373.jpg

    You don't need to take off the dash, but you do need to get the panel below the steering wheel removed and the black bottom off the steering wheel unless you have small arms. Here is a shot of what it looks like from underneath. They are the yellow wires on the far right.

    IMG_1374.jpg

    The four flat had capped blue wire that even had a tag on it that said "Elec Brake"

    IMG_1376.jpg

    I had to grind down the weld to fit the new bracket in place for the 7 way.
    IMG_1378.jpg

    I ran a black wire from the fuse box in the front of the Expedition to the rear by following the frame rail and using zip ties when needed. See the black wire connected here. You might want to add tape or heat shrink tubing but I didn't' have time and live in AZ.

    IMG_1381.jpg

    I will post a few photos of the finished product and the line from the fuse box since I forgot to take them. Took me about 2 hours to do the work. The last step is to install FORScan, get the extended license (you can get a trial for 2 months for free) and then hook it up to your OBDII. You will need to go to the "Computer" icon and the IPC (As Built) in order to change the 2 numbers referenced in the spreadsheet. FORScan is pretty easy to use but it has a learning curve, you'll get used to it quick but be careful. You must use Windows, it does not work for Mac OS.

    My dealer said it would cost me $50 to do the same thing through them, but I'm returning the OBDII Adapter to Amazon because this was my only use for it.



    Hope this helps!
     
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  10. chuck s

    chuck s Full Access Members

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    Excellent write up. Should be an article, not merely a message #79 buried in a thread!

    There are, of course, several other things Forscan can set in your truck and more are verified every few months.

    -- Chuck
     

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