2011 F150 Electric Trailer Brake Help
07-03-2013, 01:11 PM
#11
Senior Member
This morning, I extracted the pins from the 20270 cable and reinstalled them to conform to the 20272 cable pin-out. Trailer brake works! .. finally! 
The only thing left, to complete the project: is to get a charging relay and install it in the Power Distribution box.
This project has been way more work, than it should have been. Only in regards to the research, as the information is scattered all over the Internet. Also, it would have been nice, if Ford had run the wires to the back!
BTW: The charging relay, should be a 8T2T-14B192-AA or 8L8T-14B192-AA. (4 pin)
The only thing left, to complete the project: is to get a charging relay and install it in the Power Distribution box.
This project has been way more work, than it should have been. Only in regards to the research, as the information is scattered all over the Internet. Also, it would have been nice, if Ford had run the wires to the back!
BTW: The charging relay, should be a 8T2T-14B192-AA or 8L8T-14B192-AA. (4 pin)
Last edited by tmajor; 07-03-2013 at 01:15 PM.
07-03-2013, 06:15 PM
#13
Senior Member
I guess, I should be thankful that they included, what they did.
07-03-2013, 06:45 PM
#14
Senior Member
Great that you were able to figure it out and pull it all together.
Was surprised when the dealer only installed a 7 pin wired to the 4 pin.
07-05-2013, 01:53 PM
#15
Senior Member
Received and installed the Charging relay today .. charging system, now working. Project complete!
I thought, this diagram might help some, figure things out. There are two additional factory connectors (not shown, one mounted on the left/front/inner fender and the other, back by the spare tire), between the Trailer Brake connector and the rear 7 Pin connector.
2009-2012 F150 diagram
I thought, this diagram might help some, figure things out. There are two additional factory connectors (not shown, one mounted on the left/front/inner fender and the other, back by the spare tire), between the Trailer Brake connector and the rear 7 Pin connector.
2009-2012 F150 diagram
Last edited by tmajor; 07-05-2013 at 10:28 PM.
07-31-2013, 01:34 PM
#16
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I posed my problem to eTrailer and they posted an answer for me. Also, information/instructions for the 20270 and 20272 adapter cables.
I got the Blue and Orange wire run, but it still doesn't work. After looking at the difference between the two TBC cables, I can see why. Hopefully, I can disassemble the connector and make the changes.
I got the Blue and Orange wire run, but it still doesn't work. After looking at the difference between the two TBC cables, I can see why. Hopefully, I can disassemble the connector and make the changes.
07-31-2013, 02:26 PM
#17
Senior Member
Was the wiring harness located where eTrailer mentions it to be? On the driver side, above the frame and spare tire? (ist the orange power wire in that harness as well as the blue brake controller wire?) I'm doing this installation this weekend, and really hope I have got all of the correct information. Your feedback would be appreciated.
The trailer brake controller plug is on driver's side by steering column. You'll need to remove the half of the plug with no wires (sometimes referred to as "the cap")
You won't need the Orange wire, if you don't have a "break-away" battery or a trailer, which would need "charging".
Last edited by tmajor; 07-31-2013 at 02:36 PM.