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CURT

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Part Number: C56120

205 Reviews | 31 Questions

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$70.35

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2013 Chrysler 300

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curt custom fit vehicle wiring end connector 4 flat c56120

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curt custom fit vehicle wiring trailer hitch plug-in t-connector harness with 4-pole flat connector

curt custom fit vehicle wiring trailer hitch end connector t-connector harness with 4-pole flat

curt custom fit vehicle wiring trailer hitch 4 flat t-connector harness with 4-pole connector

curt custom fit vehicle wiring 4 flat plug-in c56120

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In Use/Installed

2011 ford edge custom fit vehicle wiring curt trailer hitch 4 flat t-connector harness with 4-pole connector

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2011 ford edge custom fit vehicle wiring curt trailer hitch plug-in t-connector harness with 4-pole flat connector

2011 ford edge custom fit vehicle wiring curt trailer hitch end connector t-connector harness with 4-pole flat

2011 ford edge custom fit vehicle wiring curt 4 flat plug-in c56120

2011 ford edge custom fit vehicle wiring curt trailer hitch plug-in on a

2011 ford edge custom fit vehicle wiring curt end connector plug-in c56120

2011 ford edge custom fit vehicle wiring curt end connector 4 flat c56120

2011 ford edge custom fit vehicle wiring curt trailer hitch 4 flat c56120

2011 ford edge custom fit vehicle wiring curt end connector 4 flat on a

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Videos

Trailer Wiring Harness Installation - 2012 Ford Edge

Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56120 Review

Trailer Wiring Harness Installation - 2011 Ford Edge c56120

Trailer Wiring Harness Installation - 2014 Ford Edge C56120

Trailer Wiring Harness Installation - 2013 Ford Edge

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SCHEDULE AN INSTALLATION

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56120 or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.

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Reviews (205)
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CURT Custom Fit Vehicle Wiring - C56120

Highlights

Custom Fit for Your Vehicle: Works with your vehicle's wiring
Tow Without Factory Prep: 4-pole flat connector readies your vehicle for trailer lights.
Plug-and-Play Install: T-connector plugs inline with tail lights—no splicing needed.
Protects Vehicle Wiring: Powered converter draws trailer power directly from battery.
Clean, Secure Setup: Uses factory trim routes and weather-tight connections.
Reliable Signal Output: Ensures proper brake, turn, and running light function for towing.

Features to know about

Installs Cleanly Without Splicing: Plug-In T-Connector Design

Running wires and cutting into factory circuits can be a headache. This Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector uses a plug-in design that connects directly behind the tail lights. There’s no need to cut or splice, so installation stays clean and simple. Once it’s plugged in, the 4-flat gives you running lights, turn signals, and brake lights ready for towing.

Comparison image of Curt trailer wiring harnesses showing connectors, converter boxes, and 4-way flat plugs for vehicle trailer wiring applications.

Protects Vehicle Circuits: Powered Converter Box

Modern vehicles have sensitive wiring that can’t handle extra trailer load. This harness includes a powered converter that draws power directly from the battery through an inline fuse. That setup isolates the trailer wiring from the vehicle’s taillight circuits, protecting them from shorts or overloads. It’s a dependable way to keep both vehicle and trailer lighting working right.

Reduces Electrical Issues: Dedicated Ground and Battery Connection

With its direct battery lead and solid ground connection, this harness helps prevent dim lights, blown fuses, and false signals caused by weak or shared grounds. It keeps voltage steady across all circuits so your trailer lights stay bright and consistent when you hit the brakes or turn signals.

Keeps Setup Simple: 4-Flat Trailer Connector at the Ready

The 4-flat plug gives you everything you need for basic trailer lighting—running, brake, and turn signals—all in one standard connection. It’s the common setup for small utility trailers, campers, and boat trailers. Just plug it in and you’re good to go for the next trip.

Specs

Electrical Specifications

Maximum amperage:
- Stop/turn lights: 3 amps per circuit
- Tail lights: 6 amps per circuit
Limited 1-year warranty

56120 CURT T-Connector - Surface Mount Technology - 4 Wire

Similar to Hopkins HM11140695 and Tekonsha 118515

Installation Details C56120 Installation instructions

This Product Fits The Following Vehicles

2011 - 2014 Ford Edge
2011 - 2014 Ford Edge excluding Sport
2011 - 2014 Ford Edge Sport

Customer Satisfaction Score:

95% were satisfied with this product

5% of customers were not satisfied

Product did not meet expectations
Wrong item was ordered
Defective

5% of customers were not satisfied

Product did not meet expectations
Wrong item was ordered
Defective

4.9

205 reviews

5 Stars		(187)
4 Stars		(12)
3 Stars		(5)
2 Stars		(1)
1 Star		(0)

by: Duane 07/13/2026

2 prior harnesses purchased elsewhere manufactured for the vehicle did not work. I prepped the vehicle for installation. My part arrived and installed in 10 minutes. Works perfectly. GREAT costumer support during ordering. Very patient answering all my question's. Thanks etrailer.

Mike L.

7/14/2026

You're very welcome Duane, I'm happy we could help you out!

by: Lindsey 02/19/2025

2014 Ford Edge

This went it fairly easy but I do agree with some of the other reviews in regards to feeding the plugs through the existing rubber grommets for the tail lights. It's tight but not too difficult. the kit came with some rubber silicone, so it can be applied to reseal the cut grommet. As far as getting the power wire through the firewall, I removed the battery and made a small hole with a drill bit with an extension and then taped the wire to the bit and pushed it through the grommet.

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Victoria H.

2/20/2025

Thank you for your valuable insight and for including photos with your feedback, Lindsey! I know this information will be helpful to some shopping this wiring harness in the future. What are you towing?

by: Mark 09/06/2026

2011 Ford Edge

The product worked great the hardest part was getting the power wire to the battery

by: James 06/22/2026

2011 Ford Edge

This harness is exactly what I was looking for. Worked straight out of the box just plug and play.

by: Roger 05/01/2026

Install was easy, the online video was a great help with each step in the process. Now I can use my trailer for getting lumber for my home projects and yard work.

by: Edward N. 04/15/2015

2013 Ford Edge

I ordered this item to go with the CURT Class III 2" receiver, it was a breeze to install and looks great. The shipping was AMAZING and showed up as promised... I would recommend the company and site to anyone!

* Quick install Tip if you have the upgraded stereo system as I did the passenger side tail light is a little tight. You can remove the factory subwoofer box and follow the provided instructions from there or if you are "semi-handy" you can cut the (green wire) and insert from the gasket, then simply splice the wire back. I chose the splice option, and everything works beautifully.

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by: Dick 10/10/2026

Great company, have ordered from them before. Quick, knowledgeable, and they know what they’re doing.

by: Al 03/23/2026

2014 Ford Edge

Great packaging, fast shipping, good instructional video, good diagrams, good descriptions.

by: Steven 06/16/2024 One Year Later

I feel like they could've come up with a better way. Not having to run a wire all the way to the battery. That's a bit ridiculous! I bypassed that part and just turn my lights on when using my trailer. They could've tapped into a different power source with the harness instead of a thick wire all the way to the front of the vehicle.

Steven One Year Later

6/17/2025

Same

by: Ben 07/24/2022

2013 Ford Edge

The wiring kit worked great. Pro tip, if you have the power outlet on the LH side, just grab your constant hot there. It's more than sufficient to power the module and you'll already have that panel loose anyway. There is a nice ground back there too. My only complaint is having to put such a large slice in the OEM grommet for the large molex connectors.

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by: David 04/13/2018 One Year Later

2012 Ford Edge

I would not ever consider buying tires anywhere else than etrailer. Your 5 star tires,service and follow up are wonderful.

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by: Steve 05/12/2024

Wiring went in as per the video. The only problems I had were routing the power wire to the battery, but finally found a way, and I had trouble getting the wire connectors crimped enough to hold the wires. Luckily I had extras from previous DIYs.

Steve One Year Later

5/13/2025

The wiring harness works great. No problems so far. The hitch also works great on my 2012 Edge.

by: Shane 08/02/2026

2014 Ford Edge

Good kit, easy install.

by: Rob 07/25/2026

Pretty simple 2 install I love plug n play items

by: Tom L 09/10/2015

2013 Ford Edge

I received this harness today and installed it in 45 minutes, on my lunch break. I have an Edge Limited with electric tailgate lift and base speaker in the rear, so both my right and left side were supposed to be difficult to access. At least according to the other reviews. The left side, the side with the electric lift gate arm, was done in this manner. I removed the tail light and pulled out the grommet from the outside, then fed the wiring up the inside of the trunk with my arm and used my other hand from the grommet hole to feel for the wiring. Once I felt it, I pulled it through. The other side was a bit more tricky. Once the outer trim is removed, the speaker cabinet is still in the way. But, I found 3 10mm bolts. I loosened them (they don't need to be fully removed) and that gave me enough room to pull the cabinet away from the wall and slide the wiring up and out of the grommet hole. Piece of cake. I then took the positive battery wiring and fed it through starting from the battery. Go backwards, it's much easier. Great kit and was a snap to install.

Tom L. One Year Later

9/14/2016

Great harness and install instructions

by: Jerry W 08/02/2017

2013 Ford Edge

Professional product. Install was medium difficulty but had good results. The flat 4 pin receiver just dangles from around my trailer hitch. Wish a clip or bracket to mount it could have been included. Would have made a neater looking install.

Jerry W. One Year Later

8/3/2018

the trailer wiring kit is doing just fine. Very pleased. Thanks

by: Donnie 03/30/2025

2012 Ford Edge

Very happy with this kit! It had everything that I needed. The double sided tape for the converter didn't stick but other than that I'm pretty impressed. It took me maybe an hour to install. Yhe tricky part was fishing the power wire to the battery. I used electricians fish sticks to get from the back to the front and then through the same hole as the hood latch cable. Had to move the battery too.

by: Mike V 04/24/2015

2014 Ford Edge

Very happy thus far with etrailer.com and their delivery of the purchased products. Cost and quality are very good. Haven't installed it yet , but if it goes as easily as shown in the installation videos, I will be VERY satisfied.

Mike V. One Year Later

4/26/2016

Thanks for reaching out and checking back with me. I love it. If I need to buy another one in the future I will be buying it through you all.

by: Andrew 10/31/2016

2011 Ford Edge

Product worked just fine, once installed. Running the power lead all the way to the battery is an extra chore, when others only in the past only required a t-connection at the tail light. There was no instruction or tip on how difficult it was to route the t-connections through the tight grommet, down inside the body and into the spare tire area.

Laura E.

11/10/2016

We are glad you mentioned the installation of the hot lead, Andrew. While it is an additional and sometimes cumbersome step, the hot lead is actually a way to protect the taillight circuits of the vehicle. It allows the trailer taillights to be activated by drawing the power for them directly from the battery and not from the taillights of the vehicle. This actually protects your vehicle wiring and is the safest and best way to do it.

by: Phil 01/28/2018 One Year Later

2012 Ford Edge

I purchased this wiring kit for my '13 Ford Edge along with a Curt hitch and an additional wiring kit to get electric brake control with a 7-blade connector.
This kit interfaces with the factory wiring by sensing which bulbs are being illuminated without actually being wired together with the 4 pin connector. The well written instructions made the job easy. I ran the 12 volt power wire up to the front of the SUV when I ran the cable for the electric brake controller.
The 4 pin connector simply plugs into the 7-blade connector in the other wiring kit.

by: Mark 10/05/2018 One Year Later

2013 Ford Edge

With the instructions provided, including the associated video, the installation was really easy, and all of the components were top quality.

However, the first time we hooked up a camper we had just driven 4 hours to pick up, the brakes defaulted to "on", and we could not drive with the brake controller hooked up.

Now the best part..... An etrailer technician took our call immediately, and had the background knowledge to know that some Nissan Xterras had factory wiring reversed, which required the corresponding kit wiring to be reversed. After we did so, the system worked perfectly. I would not have figured that out in a million years!!!!!

Great product made even better by fantastic service!!! Customer for life.....

by: Steven 05/13/2021

Came with everything you need. Good quality wire and accessories. Needed it because I got a good deal on vehicle, but it had no hitch or wiring for one.

Steven One Year Later

5/14/2022

So far no problems after a year.

by: Dana 01/09/2018

2013 Ford Edge

My Curt T-Connector wiring harness arrived sooner than promised - Thanks etrailer! The installation instructions and video on etrailer were a big help. The instructions that come with the unit do not include some of the detail/tips that the etrailer video does. I took my time and was very satisfied with the finished installation. My trailer has LED lights and this adapter works just fine with them.

The installation goes pretty much as shown in the video. Here's a couple of tips from my installation:

Getting the taillights out wasn't as easy as the video shows. I used the handle of a flat tablespoon and slipped it between the front of the taillight lens and bodywork. Pry back toward the rear of the car to help loosen the taillight from the two locating pins. This prevents marring the body paint and helps you pull straight back on the taillight. They come out with a scary-sounding "pop".

I found that it was not necessary to remove the rear trim panel to get the spare tire compartment bins out. I just lifted up the front of the bins while pulling back on the trim panel and the bins came out easily. I also found that it was not necessary to loosen the side panels to feed the adapter plugs up to the taillight wire opening. I was able to reach these through the opening near the bottom. The passenger side was a little tight, but I was able to wiggle the adaptor plugs through.

The video shows that you cut through the taillight wiring grommet from the outside to the center to install the adaptor wires. I was worried about the grommet not sealing properly on re-installation. I cut a slit in the grommet from the center to close to the outside edge - but not cutting through the ring that seals against the bodywork. I was able to stretch the slit over the adaptor plugs and wires while leaving the outer sealing ring intact. I used the included silicone sealant to seal up the slit where the adaptor wires come through. I'm very comfortable that I have a positive seal that will not leak.

I decided not to route the flat plug wires out through the spare tire compartment grommet as shown in the video. Instead, I keep the flat plug wiring in the spare tire compartment (when not in use) and route it out beneath the hatch door when I want to use the trailer. The installation video for the Tekonsha T-One adaptor shows this method. Seems to work just fine.

Other than these differences, the installation went exactly as shown in the video. The adaptor has been working great with no issues. Thanks etrailer!

by: Kevin 11/06/2017 One Year Later

2011 Ford Edge

The box arrived quickly, contents in perfect condition. The hitch was perfectly engineered to fit our Ford making the assembly easy and required just basic tools. Your company's wire pull through gadget is very clever, easy to use and solve the huge problem of getting the fasteners in place. We have used the trailer a dozen times and it sure comes in handy. The electric harness took the most time since I did not want to have loose wires showing anywhere. I would, without hesitancy, recommend etrailer's parts.

by: Johnny R 01/28/2017

Wire harness arrived as promised with the 2-day delivery; packaging was appropriate and in good shape; product is as advertised. The trick today is the installation.

John H. One Year Later

1/28/2018

Great product and continues to work as advertised.

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See what our Experts say about this CURT Custom Fit Vehicle Wiring

Do you have a question about this Custom Fit Vehicle Wiring?

Troubleshooting Turn Signal Circuits of 7-Way that Have 12 Volts All the Time
Hey Mark, so what is most likely going on is that there is a short between the 12 volt accessory circuit of your 7-way and the turn signal circuits that are hot all the time. This is most likely due to a problem with the wiring behind connector due to exposed wire and if you inspect and fix that you should be good.
view full answer...
Trailer Wiring Harness Recommendation for a 2013 Ford Edge
It would appear as if the Replacement OEM Wiring Harness part # C56110 that you referenced would work on your 2013 Ford Edge since you have what looks like the correct port for it. By the way, thanks for the picture. What you can do to verify that the plug is active is use a circuit tester like our part # PTW2993 and test the different pins you see for voltage when the brakes/blinkers/running lights are on. If the pins carry voltage with the use of your taillight functions then the # C56110...
view full answer...
Troubleshooting No Power at Factory Brake Controller Port on 2008 Ford F-150
If you aren't getting any power to the factory brake controller port beneath the dash of your Ford F-150 then most likely you have a blown fuse under the hood. I took a look at the online version of the owner's manual for your 2008 Ford F-150 and it lists the trailer brake controller fuse in the F105 position inside the power distribution box. This is a 30 amp cartridge fuse. Replacing this particular fuse should get power back to the brake controller port and resolve your issue.
view full answer...
Trailer Lights Only Work with Doors Open
It sounds like you do not have the 12 volt power supply installed correctly. The 12 volt power supply like the one on the Curt T-Connector Vehicle Wiring Harness part # C56120 which is a fit for your 2012 Ford Edge will need to be ran directly to the battery with the included 10 amp fuse placed 6" from the positive terminal. You cannot use any other power source for the wiring harness and it sounds like you may have it tied into an interior lighting circuit which is why the lights only...
view full answer...
Trailer Wiring Harness Recommendations for 2013 Ford Edge
To install a 4-pole trailer connector on your 2013 Ford Edge, I'd recommend the Tow Ready # 118515. This wiring harness does have a direct connection to the battery, this is done for a good reason. Years ago, you could tap into the taillight circuits to power your trailer taillights. The wires were of sufficient gauge so that plenty of power for both the vehicle and the trailer taillights could be drawn through the vehicle's taillight circuits. Now, due to cost restraints, the automobile...
view full answer...
Troubleshooting Factory 4 Pole Trailer Connector on 2013 Ford Edge
It's possible that you've got some blown fuses or relays in the distribution box under the hood. Check fuse locations 37, 53, and 63. If you have blown fuses, it's likely they were blown by short circuits in the wiring of the trailer towed by the previous owner. If the fuses aren't the issue, rather than tracing the trailer wiring from the rear of the vehicle up front, you'll be better served by just abandoning the factory setup and installing an aftermarket trailer wiring harness like...
view full answer...
Troubleshooting a 2008 Ford F150 Trailer Connector with all Functions not Working
You really should not have to put a plastic bag over the trailer connector on your vehicle during rain. It should be protected enough that that would not be necessary. In fact, the plastic bag could actually have collected water and held it to the connector and caused moisture to short out circuits on the connector. It sounds like a relay or fuse is blown and took out all of the trailer wiring circuits. If you can find the battery junction box you should check the condition of the following...
view full answer...
Installation of the Curt Custom Wiring Harness # C56120 on a 2013 Ford Edge
There are a set of installation instructions included with the Curt Custom Wiring Harness, # C56120. I have also attached a link to the instructions for you to check out. The instructions even include photos of the installation process. To install this wiring harness on your 2013 Ford Edge, you will need to gain access to the back of the tail light assemblies. This is done by removing two bolts that hold the tail lights in place. Once you remove the tail light assembly, you will see a...
view full answer...
2011 Ford Edge SEL Trailer Wiring Battery Wire Installation
It's hard to say exactly what the wire you found in the back of your 2011 Ford Edge was used for. It could have been for a stereo. But since the Curt Wiring harness # C56120 that you referenced requires you to run the battery wire all the way to the positive battery post you would need to run that wire to the battery instead of the fuse box if you plan to use it for this install. I attached an install video for this harness for you to check out as well.
view full answer...
Troubleshooting Curt Trailer Wiring Harness that Blows Fuse When Brakes are Applied
You can try improving the grounds of the trailer wiring and the Curt harness part # C56120 to see if that prevents the fuse from blowing. My normal assumption is that there's a short on the stop/turn circuit but that's normally not the case if it's happening on two trailers. Check the wiring of the Curt harness to see if there's any cuts or exposed wiring that might cause a short.
view full answer...
Non-Intermittent Power On Trailer Turn Signal Circuit for 2013 Ford Edge with Curt Wiring Harness
If you have a constant signal when testing the right hand stop/turn pin on the trailer side trailer connector then we know there is an issue with the vehicle or wiring harness. The next step I recommend you take is test the right hand turn signal wire that leads into the converter box. If all is normal here then we know the wiring harness is bad and will need to be replaced for which I recommend the T-One Vehicle Wiring Harness part # 118515 as it is a more reliable option than the Curt...
view full answer...
How to Remove the Plastic Trim Panel Rivets on a 2013 Ford Edge
I am not sure what you are referring to as the arm but the side panels in the trunk of your 2013 Ford Edge are held in place with plastic push rivets. What you will want to do to remove them is pry up the center section with a trim panel tool like part # ALL648544 and then pull the rest of the rivet out. If you take a look at the attached install video, this will show you all of the necessary steps needed to install the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector...
view full answer...
Is There a Trailer Hitch for a 2014 Ford Edge SEL That Does Not Require Drilling
The trailer hitch options for a 2014 Ford Edge SEL all require drilling but that said, it most likely is not what you are thinking as it's very minor, only one small hole on each side of the frame. Again, this is required for all trailer hitch options that fit this vehicle. The Draw-Tite Max-Frame Trailer Hitch Receiver part # 75992 is what I recommend using. If you don't already have the wiring, you can use the Curt T-Connector Vehicle Wiring Harness part # C56120.
view full answer...
What is the Towing Capacity of a 2012 Ford Edge with 2.0L I4 Engine
According to page 230 in the owner's manual for your 2012 Ford Edge with the 2.0L I4 engine, the towing capacity of the vehicle is 1,500 lbs. Although the trailer hitch receiver is most likely rated for more than this figure, you will need to abide by the lower of the two as that will be the limiting factor. Therefore, as long as the weight of the trailer and all of it's cargo does not exceed 1,500 lbs then yes you can tow it. In order to tow a trailer with your Edge you are going to...
view full answer...
What to Test When There is no Power to a Vehicles 7 Way or 4 Flat
The fuses are typically the place I start when troubleshooting a plug with no power, but as you have completely replaced your fuse box, that is a bit of a moot point. What is most likely causing the lack of power is damage to one or more wires. Using a tester, like the Circuit Tester # PTW2993, you will need to test the pins on the plug. If you have a 7 Way connection, the 2 o'clock position will be your 12-volt power, the 3 o'clock position will be the right turn signal and right brake...
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Troubleshooting Trailer Lights and Brakes After Rainstorm
Since the issue you are describing after the rainstorm is the same on two different trailers, it definitely appears to be coming from your Ford F-150. With that being said, I still recommend using a circuit tester like # PTW2993 to test the pins on the truck's 7-Way for function. Have a buddy run through the light functions in the cab while you test the pins. If you don't get any power, then you know for sure the problem is on the truck. Since water got into connector, I recommend inspecting...
view full answer...
Troubleshooting 2018 Ford F-150 W/ 4-way Connector That Has Power But Doesn't Power Trailer Lights
Since your 2008 Ford F-150 has a 4-way connector and you tested it and it has power but your boat trailer lights are not working I would check that the connector does not have corrosion/debris on or in it causing a connection issue. It sounds like your truck came with the factory 4-way connector, and if that is the case then it does not have the correct connector to just replace the connector with a 7-way. Instead you would need to use the # 37185 which will plug into your factory 4-way...
view full answer...
Troubleshooting a Blown Trailer wiring Harness on a 2012 Ford Edge EcoBoost
I hate to say it, but the company who installed your harness is probably right. We see what you are describing pretty often and the problem is almost always a short on the trailer. Or its that the lights on the trailer draw too much amperage for the converter and it shorts out like that. The reason the box will short out and not the fuse is because the fuse is between the battery and the converter, whereas the short is on the other side of the converter box. The fuse protects the converter...
view full answer...
Wiring Harness for 2012 Ford Edge
Wiring harness # 118540 would not work with a 2012 Ford Edge; that vehicle requires a powered converter like one that is found in the Curt T-Connector Wiring Harness # C56120. I've left a link to a video review and install for you to take a look at.
view full answer...
Troubleshooting Trailer Wiring that is Dim on One Side of Trailer
Sounds like the problem is actually on the trailer side of the equation. Most likely the grounds on the driver side of the trailer wiring are insufficient and causing the lights to illuminate dimly. Make sure that the trailer side connector are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything...
view full answer...
Constant Power to 4-Way Harness on 2014 Ford Edge
If you are getting constant power to the Curt Wiring Harness # C56120 on your 2014 Ford Edge the issue is likely a short somewhere since you tested this on multiple trailers and the same thing is happening. So you will need to find the short by tracing your wiring and looking for any that are crimped, broken or otherwise damaged and repair as needed. I have added links to a pair of help articles on trailer wiring, including a troubleshooting guide which I highly recommend taking a look at.
view full answer...
How to Determine if Trailer Light Converter Box is Fried
It sounds like it might be the harness but you can check this pretty easily by using a circuit tester like part # PTW2993 to test for voltage on the input side of the box to make sure it's receiving the correct signal as well as on the output side. If nothing is coming out of the box it would be fried.
view full answer...
Trailer Hitch Fit for 2013 Ford Edge
The trailer hitch you referenced, the Draw-Tite # 75728, is a fit the Ford Edge Sport. If you have the non-Sport version then we have other hitch fits for your car. The link at right will show you all hitch options for the non-Sport version and these include both 1-1/4-inch Class II and 2-inch Class III types. The linked article will give you details about hitch types. I recommend a 2-inch Class III hitch, Curt # C13067, since this unit costs less than other options and since it offers...
view full answer...
Troubleshooting LED Trailer Taillights that Stay Dimly Lit
Since it only takes a tiny amount of voltage to illuminate an LED what you are seeing is normal. The tiny bit of voltage present on your trailer wiring harness is illuminating your LEDs slightly. What you can do is install load resistors on the circuits of your trailer that are dimly lit and the problem will go away. For that you would want the part # DI34ZR. My contact at Curt stated that the small amount of power will not drain the vehicle battery since it is much a minute amount of...
view full answer...

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