2017 factory brake controller

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Langer

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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.
 

Expy00

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My question is this... Do I need to get a full "Universal Kit" to convert the 4 pin to a 7 pin that has all the 10 guage wire (https://www.etrailer.com/p-ETBC7.html) or can I simply get the adapter and find the capped blue wire that MAY be in the rear of the Expedition already? https://www.etrailer.com/Wiring/Mig...MIxPb9sufL4gIVjcpkCh2paQCnEAQYASABEgK6OvD_BwE

Where would I find the blue wire to tie into? Is it near the rear tail light or somewhere else?

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.
 

Expy00

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...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.

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?
 

HandyAZ

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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
 

HandyAZ

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You can install and connect any standard 7-pin adapter. The View attachment 30358 View attachment 30359 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.
Your photos are great! Thank you. I will see what happens when my vehicle arrives.
 

HandyAZ

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You can install and connect any standard 7-pin adapter. The View attachment 30358 View attachment 30359 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.

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.
 

chuck s

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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
 

Langer

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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?

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

In my 2016 owners manual under fuse specification chart I believe it is the #48 40 amp fuse. If it doesn't have a fuse then you'll need to get one and just remember to get the low profile fuses. Remarkably easy to run a line back to the trailer hitch.
 

HandyAZ

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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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