bing tracking image

Trailer Wiring Harness Adapter Installation - 2011 Ford F-150

content loading

Customers compare 37185 to these similar products

Products Featured in this Video

How to Install a Trailer Wiring Harness Adapter on a 2011 Ford F-150

Today on our 2011 Ford F-150, we are going to be installing the 4 to 7 pole connector part number 37185 by Hopkins. This will be in conjunction with our Tow Ready universal mounting bracket part number 18136, and our Draw-Tite wiring to connect the power and brake control circuit part number 5506 by Draw-Tite. First, we will connect the universal mounting bracket to the seven pole connector. We'll be using all the fasteners provided with our install kit. Now before I mount this bracket to the hitch, I am going to take some black electrical tape just to wrap up my wires to clean up my install look. Alright for easier access to the wiring harness and install, we've already gone ahead and removed the spare tire.

Now we can go ahead and take the Universal Mounting Bracket along with the provided clamp, and secure it to the hitch. Next we're going to take the white wire with the pre-formed ring terminal attached, which will be our ground wire and secure it here to the frame. We'll be using a self tapping screw to make that connection. Next we'll go ahead and take the manufacturers four-pole connection and attach it to our 4 to 7 pole connector. To secure this connection point for longevity, I'm going to go ahead and take a zip tie and secure the two connectors together.

From our new 4 to 7 pole, to the manufacturers four pole. Now we can go ahead and take the wiring from our Draw-Tite installations kit, we're going to strip back the sheething and the wiring cover so that we can make the connection with the blue and black wire coming out of our seven pole. We'll go black to black, blue to white. Now we're ready to go ahead and start routing our gray duplex wire up to the engine compartment. For this application, we're able to run our wires through the frame, but anytime you're routing your wires, you need to be mindful of moving components such as exterior suspension, or excessive heat such as exhaust.

To make it easier to route my wire to the frame, I will be using some red airline tube, but some stiff wire can also be just as effective. Now with my wire fed into the frame, we can come back here to the hitch and the seven pole, use some black zip ties and black electrical tape to clean up our install look and secure our wiring. Now we've got our new duplex wire running into the engine compartment, we've gone ahead and secured it with some black zip ties. Next I'm going to go ahead and measure the length that we'll need and cut off the excess. Now we can go ahead and strip back the sheething and strip back our white and black wire.

Next I'm going to go ahead and remove the manufacturer's connector from the wheel well here, we'll take our utility knife to cut back some of the electrical tape so that we can pinpoint and access the dark blue wire that runs into the connector. If you look closely, you'll see the dark blue wire runs into the connector but does not come out of the connector. This is the manufacturer's break signal circuit. We'll go ahead and cut it, strip it back, adding a butt connector to the white wire that we just ran from the seven pole. The other one will connect to the dark blue wire we just cut going into the connector. Note that we will be cutting the opposite side that runs into the connector here on the fender well. This will complete the brake signal circuit back to the seven-pole. Next, we'll go ahead and mount the 40 amp breaker that comes with our install kit using some self tapping screws here to the inner fender well. Now with that completed, we'll go ahead and add a ring terminal to the black wire and then make the connection with our breaker. This will be on the silver post, not to be confused with the copper post of our breaker. Now we can take the extra wire that we clipped off earlier from our duplex cable, and we're going to remove the sheething by stripping it back. This will give us the black wire that was left over, we'll strip back one end and add a ring terminal. This end will be added to the copper side of our breaker, and the opposite side will be run over to the positive battery terminal; as we route our wire, we'll just use some black zip ties to secure it. Now we've got our wire routed over to our battery, we'll go ahead and strip it back and add the battery ring terminal to the positive battery terminal. Now I'm just going to go ahead to take another zip tie to finish securing my wire, I'll use my side cutters to cut off any excess from the zip ties, cleaning off our install look. with this completed, that will complete the install of our Hopkins 4 to 7pole connector part number 37185 along with the Tow Ready universal mounting bracket part number 18136, and our wiring install kit by Draw-Tite, part number 5506 on our 2011 Ford F150.

Wayne B.


Good video. I have a couple questions though. Does this procedure eliminate the need for a progressive brake controller and if so what keeps the trailer brakes from locking up every time you hit the brake pedal?

Les D.


The installation of this part only provides an electrical receptacle to be wired to towing vehicles that did not have one factory installed. If your trailer has electric brakes installed then you should use them. In that case you will need to additionally install a trailer brake controller near the driver if your towing vehicle does not have one factory installed. Of brake controllers there are old-style time delayed controllers that do not have very smooth braking, and there are proportional controllers which smoothly apply your trailer brakes proportionally to the braking of your towing vehicle. I like the Tekonsha # 90885 controller. I like the Tekonsha brand and the manual braking lever that wireless types do not have.

Frank N.


I have a 2011 F150 that I want to convert from a 4-way to 7-way. This video at the 4 minute mark shows to connect the wiring kit to the blue wire. When I called I was told I needed to buy a brake controller and plug it in under the dash. Not sure what to do?

Etrailer Expert

Rachael H.


If your truck has the factory 4-flat then you would need to use this kit to create a functional 7-way and get the brake signal from the brake controller to the trailer connection point. I have included a help article that explains how to install the # ETBC7. Then depending on which brake controller you choose you can get the associated wiring harness that connects under the dash to the brake controller of your chosen brand. I have included a link to the brake controllers that are compatible with your 11 F-150 for your reference.

Ot M.


I have a 2012, seems that I have to run the same wires, because my truck doesnt have the red and blue wire under the bed. Am I correct? Is the 2012 the same as this one 2011?

Etrailer Expert

Rachael H.


Both the 2011 and the 2012 Ford F-150s are part of the twelfth generation of the F-150. This wiring harness is used if the truck did not come equipped with a functional 7-way. If your truck has a 4-flat, then you would need to install this harness and route the 12V power wire from the battery, and the brake signal from the brake controller (if not equipped). I have included a couple of help article that should help with this information.

Info for this part was:

Employee Joe V
Test Fit:
Joe V
Employee Nicholas E
Test Fit:
Nicholas E
Employee Shane T
Test Fit:
Shane T
Employee Randy B
Test Fit:
Randy B
Employee Joe B
Test Fit:
Joe B
Employee Jared G
Test Fit:
Jared G
Employee Brent H
Test Fit:
Brent H
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee Conner L
Test Fit:
Conner L
Employee David F
Test Fit:
David F
Employee Bradley B
Test Fit:
Bradley B
Employee Zack K
Video Edited:
Zack K
Employee Andrew K
Video Edited:
Andrew K
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Andrew L
Video Edited:
Andrew L
Employee Dustin K
Video Edited:
Dustin K
Employee Sue W
Video Edited:
Sue W
Employee Chris R
Video Edited:
Chris R
Employee Zach D
Video Edited:
Zach D
Employee Jeff D
Installed by:
Jeff D
Employee Kathleen M
Video by:
Kathleen M
Employee Alan C
Video by:
Alan C
Employee Jonathan Y
Video by:
Jonathan Y
Employee Thomas T
Video by:
Thomas T

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.