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

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

Item # C56040
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Custom Fit Vehicle Wiring

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C56040 - Powered Converter Curt Trailer Hitch Wiring
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. Call 800-298-8924 to order Curt custom fit vehicle wiring part number C56040 or order online at etrailer.com. Free expert support on all Curt products. Guaranteed Lowest Price 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 (737)
  • Q & A (168)
  • Videos (24)
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Curt Custom Fit Vehicle Wiring - C56040

  • Custom Fit
  • Trailer Hitch Wiring
  • Curt
  • 4 Flat
  • Powered Converter

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point in rear cargo area
    • Plug in connector
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


Specs:

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


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the interior trim panel in your rear cargo area. Once you've plugged in the converter, insert the included 10-amp fuse into the integrated fuse holder.


Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area. Adhere the black converter box to the frame of the car using the double-sided tape provided. Secure any loose parts of the T-connector with the provided cable ties.


It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 4-pole connector itself - to help prevent corrosion.


Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.


Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.


Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.


Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.


2010 Subaru with Backup Sensors

56040 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C56040 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


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

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Curt T-Connector Vehicle Wiring Harness Review

Today we're going to be taking a look at Curt's t-connector vehicle wiring harness with four pole flat trailer connector. We always recommend you use our fit guide to ensure you're purchasing the correct harness for your vehicle.And this is what our harness is going to look like when it's installed. It's going to hang out the back of your vehicle when in use and when not in use it will store inside of your rear compartment. This is a four pole connection, so it's going to provide you with your left turn signal, right turn signal, tail lamps and brake lamps keeping you DOT compliant in all states. Our module protects our vehicle so if there's any faults with our trailer, the module will shut down the circuit and prevent any damage from happening to the wiring on our vehicle. Additionally, our module is fuse protected.

So if there was an error with the module that caused a short that it didn't prevent, the fuse would just pop for the module and not for anything on the vehicle.As you can see here, we've got plenty of length, so you can ensure that your four pole connector will reach the connector on your trailer. And when not in use and you have it out the back, you can use the dust cap to store it by securing it to your hitch by putting it around a safety chain loop. Although when you're not using it, it is recommended that you store it inside the vehicle and there's plenty of locations here in the back for you to wrap it up and store it alongside your tire, keeping things nice and neat on the inside and nobody's even the wiser that you've got it installed. And this should work out regardless of which Subaru model you've got. There's going to be places to store it back there.The module box has a maximum output of three amps on your stop and turn signal circuits and six amps on your tail lamp circuits.

So this will be more than enough for a trailer full of LED lights or even some that had the older incandescent lights. And one of the best features is that it's just one plug. This is a custom fit plug and play option so you don't have to worry about any cutting or splicing, running a power wire front to back, quick and easy. And regardless of which Subaru you're installing this on that it fits, they're all going to be located back here in this back apartment, typically on the driver's side over here. They do vary a little bit on how front and back they're going to be depending on your year, make and model.

On our 19 Crosstrek here, once we lift up this back panel and ours is just going to be located at the driver's side underneath this panel here.And this is what the connector is going to look like. Regardless of which Subaru you have, it's going to have the same connector here. It'll have three pins on top with five on bottom and your release tab located there. On all of these you're simply going to plug your harness in to complete your connection there and then we'll take our ground wire. We're going to use a self tapping screw to just run it into the panel down here.

The self tapping screw comes with the kit and you're just going to run it into the side panel, and if you had one of the Subaru's where it was located further on the driver's side, that panel, you could just run it into that panel over there. We're going to be putting it on the back panel on our Crosstrek here. We're going to use a quarter inch socket for our self tapping screw and just thread it right in.Next, we'll install our fuse. Now you get your self tapping screw and your fuse out of your hardware kit here that comes with it. A lot of these things in here we don't need. The zip ties are nice for tying up our wiring and the sticky pads for keeping our module in place, but the butt connectors and ring terminals, this is just the standard hardware kit that comes with Curt's custom wiring. You may not necessarily use those all on your particular vehicle. For our Subarus here, we won't be needing a lot of that. Well now insert our 10 amp fuse into the harness.Now we just need to clean up our wiring here and secure our module with the double sided tape. Now for demonstration purposes, I'm not going to be putting the double sided tape on there. You just want to find a location that's out of the way where you can stick your module. On this vehicle, I would probably put it in somewhere right around here that way it's not going to interfere with any of your paneling, it won't interfere with your spare tire and you'll be able to easily access your connector. Now with our electrical box and wiring secure, you'll easily be able to access your harness whenever you need it by simply lifting up your compartment, pulling it out of the tray, draping it over the back, and then you can shut your lift gate right on top of it. You just want to make sure you avoid the striker here in the centers, so I like to put it off to the driver's side a little bit. It'll pinch it between our weatherstripping, which will keep it in place and it won't cause any damage.And that completes our look at Curt's t-connector vehicle wiring harness with four pole flat trailer connector.


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C56040

Average Customer Rating:  4.9 out of 5 stars   (737 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.

- C56040
by:

Was easy to install and I'm glad I listened to the video and didnt try to run the wiring to the lower panel. It was pretty simple to install. 576269



- C56040
by:

Wiring kit installed in minutes. Worked first time I tested it then after putting everything in place, it wouldn't work. It turned out to be a bad connection in the plug in my car, not this harness. The kit has everything needed for installation and includes a long cable on the flat 4 plug end. Very easy to store the flat 4 plug inside the car except when using it, just as described in the video. Thanks etrailer!!!! 198683


Comments
The installation was as easy as the on line video suggested. I was very pleasantly surprised it went as well as in the video! This clearly was developed with some thought. Both items were extremely easy to install and have been working fine since installation. Whenever I need anything for my vehicle or camper in the future, I most definitely will go immediately to your webpage.Thank you for quality products at a great price. I have to tell you, this follow-up email just made my day! Thanks for thinking of me............Just another really satisfied customer
John - 06/18/2016

18789

- C56040
by:
2013 Mazda 3

After installing a Modulite protector on my Mazda 3, I have to say this install was a BREEZE... Imagine an actual plug that you just plug in... WOW, what a mind blower! He He. The product easily installs under the drivers side, rear kick plate. On our 2013, the trailer wiring plug is right at the back of the car. You just have to pull off the hatch trim panel to get to it. Running the extra ground wire is no big deal. I drilled a hole, sanded off the paint around it. screwed down the round flat connector with the provided machine screw, and put some RTV on top of it to prevent rust. 94363


Comments
They both worked great, thank you for the follow up!
Mark F - 02/20/2015

9643

- C56040
by:
2016 Subaru Outback Wagon

This is a follow up on my previous review (the one with the cat in the picture). This is an EXTREMELY simple installation in your 2016 Subaru Outback. Except for the part about finding the OEM plug under the side panel. The etrailer video is very accurate, especially the more recent one that's about 7 minutes long. The hard part is getting your hand up in there far enough to reach the plug. This depends on the size of your hand! In my case, it wasn't until I had help to hold the side panel out while I stuck my hand in there was I able to get it done. I also used a putty knife to pry up the little lip of the side panel over the black plastic trim that is located right beneath the tie-down ring. That gave us enough slack to pull the panel out. The side panel did not suffer any damage by this procedure. There are also insulation pieces in the way, so if you get discouraged keep pushing. It's up there. I actually pulled some of the little squares of insulation out just because (frustration while I was waiting for my help to arrive), but they are easy to stuff back in when you're done. You shouldn't have to do that. While you're hunting, keep in mind that it is really close to the tie-down ring, about 3-4 inches, and it is up high, about the same level as the top of the ring enclosure. Once you feel it, you will know it. There's nothing in there to get your fingers confused. Give it a good pull. There's not much slack, it will only come out far enough to plug in and push it back under. It was plug and play and my trailer lights worked perfectly with no problem. I've been a big fan of etrailer for at least 10 years, and once again they did not disappoint. 453108



- C56040
by:
2013 Subaru XV Crosstrek

The instructions for the electrical connector were missing the details for the XV Crosstrek. So after taking off most of the panels at the back of the car, I called the tech support number and he suggested to look under the kick plate at the very back of the car. After removing the back panel, the plug was easily found on the drivers side against the back wall of the car. Since this is a new model for 2013, I assume the instructions will be updated shortly. 66859


Comments
White connector is under hatch kick plate , Left of center of rear spare tire compartment. . It is tape to a plastic wire hold down. pop out hold down remove tape there you go. Hard to see and feel with finger tips. remember its at the back of vehicle hatch opening kick plate. NOT UP BY SEATS . GOOD LUCK 2013 crosstrek.
-- comment by: Carl - 05/18/2013

1517

Thank you for the additional info.

-- Patrick B - 5/20/2013

Comments
Im still having a bit of trouble with the kick plate removal on my Crosstrek. Just to make sure were talking about the same piece... Im assuming the kick plate is the piece that runs across the bottom of the hatch opening that the hatch latch pokes through. It has two button fasteners which Ive removed but the panel still seems to be firmly attached. It appears to snap in but Im a little leery of pulling too hard and breaking it. Is there a trick to its removal?
-- comment by: John R - 07/31/2013

1834

There are little retention tabs on the underside of the panel that help to hold it in place. Once you remove the push rivets, gently and firmly pull up on the panel. Check out our install video on the 2013 Crosstrek to see it in action. There are a couple of video links below the main photo.

-- Patrick B - 8/5/2013

Comments
Have wire harness for my new 2014 Subaru Forester. Can not find connector in vehicle. Comment below said it is located just left of center at the rear under the hatch kick plate Have no idea what the hatcdh kick plate is : I have used fingers, mirror and flashlight. HELP!! Thanks
-- comment by: Dick G - 08/01/2013

1842

The kick plate is right at the threshold, the long piece of plastic covering that goes along the cargo area where the latch is. Check out the link to the video on the Crosstrek to see removal of the kick plate.

-- Patrick B - 8/5/2013

Comments
plastic wire hold down in his kick plate sounds like the metal cargo tie in, which has a plastic bezel, in the side panel of my 2014 Forester. I need to remove this in order to access the connector. Seems like Carlo was able to pop his out, which I have not been able to do. Mine has a metal tab poking through the back attachment bracket that could be a release, but so far I have not been able to make it move. Any suggestions.
-- comment by: Ed V - 10/07/2013

2153

Send me a photo of the tab if you can. I have a feeling it is just a spring tab that helps hold by tension and firmly pulling on it or slightly squeezing and pulling will get it to release. But to make sure, it would help to see pictures first in case it is something other that what I think it is.

-- Patrick B - 10/10/2013

Comments
All is good with the trailer hitch and wiring harness. Thanks to the folks at etrailer we were able to quickly resolve the instructions for the Subaru XV wiring harness. Being a brand new model last year, it was not unexpected that there would be some growing pains with the installation instructions.I have recommended your company to several of my friends who are looking for trailer hitches.
-- comment by: dave - 02/18/2014

2855
Comments
I just installed this wiring kit on my 2014 Subaru Outback. The installation was very straightforward. The connector plug was hidden at the spot that the instructions suggested. I dont think I would have found it without the guide.I ordered the product at 10:00 pm on 317 and received it on 3/20. E-trailer provided emails to confirm the order and shipment.Thanks e-Trailer for great service!
-- comment by: Keith - 03/23/2014

3225

Thanks for the feedback, glad to know the harness installed with relative ease. Give us a shout if you ever have any questions.

-- Patrick B - 3/27/2014

Comments
Just purchased new 2015 Subaru Forester Im installing hitch and wire harness by myself . Video instruction is absolutely great .Thank you for making my life easier
-- comment by: George Z - 09/01/2014

6596

- C56040
by:
2015 Subaru Forester

Ordering, receiving and installing this trailer light connector was easy and without any issues. This was a replacement for one in use only 18 months before failing. If this one fails in a similar time frame, I will try another brand. Hopefully, the first was a fluke and I get several years service out of this one. 587703


Comments
The failure of a trailer taillight converter is typically caused by a wiring problem somewhere on the trailer that leads to a short circuit which ultimately damages the taillight converter. After replacing the damaged wiring harness, be sure to thoroughly check the wiring on the trailer. Begin at the trailer connector, and follow each circuit back to its lamps. Look for pinched wires, loose connections or cracked/worn wire insulation that would allow the wire to short out on the trailer frame. If the short isnt located and repaired, youll continue to blow out taillight converter harnesses. Ive linked to a couple of help articles that should provide some assistance.
-- Mike L - 12/01/2018

46283

- C56040
by:

Very easy to install if you are a handy person 568866



- C56040
by:
2013 Subaru Forester

Harness installed in the 2013 Subaru Forester like it was factory. Plug & play done in 10 minutes. Great order cradle to grave for me. 565860



- C56040
by:
Ford Edge

With the factory connector installation was a breeze! The hole and plug that the wires exit the vehicle to go to the hitch was on top of a heat shield that had sharp edges, so I used 3/8" plastic split-loom to protect the wiring all the way from the hole to the 4-pin connector. In order to keep the factory rubber plug, I used a utility knife to cut a slit from the center of the plug straight out to the edge of the plug, and then cut a tiny area out of the center of the plug. This let me slide the plug onto the wires and place it right back into its hole. 130770



- C56040
by:
2017 Subaru Outback Wagon

5 stars for the wiring harness which works just fine in my 2017 Subaru Outback Wagon. The install took some time though (more than it took to install a Curt hitch) because it was hard to locate and expose the car's wiring connector. Would give the install a 3 star for that. The harness instructions have pictures showing where to find that connector behind a panel covering the left rear wheel well. But you don't know exactly where behind that panel, and it's a tight squeeze getting your hand & forearm in there to find it. A small mirror helped. The harness is looped back on itself so you won't see the connector, look for the loop and maybe some blue tape which holds the loop. It's finding that loop that took the time. I routed the harness out through a rubber plug in the spare tire well. It's easy & much neater than running it under the tailgate when you're towing. Remove the rubber plug, slice it from the center to one edge so you can get the wiring harness into it. Figure out how long a wire you need outside the car, reinstall the plug, and seal around the wire with 100% silicone caulk. I connected the grounding wire to an existing bolt inside the car (just secure with a second nut) rather than drilling a new screw hole. 483150


Comments
No issues at all, works as it should.
Charles - 03/17/2019

50645

- C56040
by:
2017 Subaru XV Crosstrek

Installing this powered trailer lighting adapter was pretty easy, the most difficult part being removal of the trim panels. If you haven't done this sort of thing before you'll find that an inexpensive set of trim removal tools will be a significant help. Subaru did the wiring job properly - contrary to what I expected you don't have to run a hot wire to the battery, a hot is already present at the connector - and the actual hookup is pretty easy. The assembler who secured the connector pigtail at the factory was perhaps overly enthusiastic with the electrical tape so a sharp knife and some careful dissection was required to avoid damaging any wires. While the instructions suggest drilling a hole and using the included self-tapping screw for the ground wire, on my 2017 Crosstrek that wasn't necessary as Subaru has thoughtfully provided a tapped hole for an M6 screw in the perfect location. I used an M6-100 hex head bolt with both a flat washer and a lock washer. 430177



- C56040
by:
2019 Subaru Outback Wagon

Harness was perfect for my 2019 Outback. The instructions that are available on etrailer and come with the harness which did a great job of giving me the general location of the connector. Took me a little while to fish it out as Subaru had it tucked up in the trim very well. Once I had it out and visible the remainder of the installation was a snap. I did vary from the instructions however and ran the harness through one of the rubber plugs at the bottom of the spare tire well. This allowed for a very clean, permanent installation using a bracket attached to the hitch as the picture shows. 568307



- C56040
by:
2014 Subaru Forester

I installed this on a 2014 Subaru Forester. Does exactly what it is supposed to do and is easily installed. Be sure to remove the threshold trim piece before removing the rear 1/4 panel. I only took the 1/4 panel loose at the back end and the connector is right there behind the very back end of the panel. I left the vehicle's connector where it was and plugged the new connector into it without undoing anything. There is ample room right behind the 1/4 panel on the floor to stick the switching unit down. I used the bolt that holds the left rear tie-down bracket to the frame for the ground lead. The ground terminal will fit this bolt just fine. Sorry, but didn't think to take any photos. Remember to remove the threshold trim piece (the latch hardware piece sticks up through it at the middle). There are videos on their website (for other Subarus) that you can view for further info. The printed instructions included for the Forester doesn't mention the trim piece on the threshold, only says to remove the rear trim piece, so it is somewhat incomplete. 108038


Comments
Still going strong. Havent had any issues.
jd - 11/22/2014

7792

- C56040
by:
2018 Subaru Outback Wagon

First off, it works; I tested it with my boat. Second, it's so good that I no longer have to splice wires to get a good trailer light connection. Third, the instruction video by etrailer was a big help but there's one thing that I really need to elaborate on; finding and fetching the Subaru plug in which to hook up the unit. Subaru puts the plug deeply under a side cover that was nearly impossible to fetch. I strongly recommend that you look at the video and add one more thing; remove the forward hold down ring to expose the wire, tape, and plug. Neither my wife with skinny arms nor I could reach it as shown in the video. By removing the hold down ring, I was able to see the wire, slice the tape with a pocket knife, and push the plug toward the rear of the car to make it reachable. We struggled, got cuts, and cussed a bunch trying to find the plug and this made it easy. Also by removing the hold down ring I was able to pull the side covering out enough to get more arm into the gap. Otherwise I would NEVER have been able to make the connection. Otherwise, everything went just as shown on the video. 510712


Comments
Subaru is well-known for varying the location of the connector for the trailer wiring plug, especially on Outback models. On some vehicles, its even located on the passenger side so unfortunately it can take some detective work to locate it!
-- Mike L - 05/21/2018

38752

- C56040
by:

This is my second purchase from etrailer and as with the first, everything was super easy. I love the videos because it explains everything you need to do. From start to finish installing the wiring harness took about an hour with all the proper tools. There are 2 things I did different than the video. First, I mounted the box to the top of the inside of the plastic side panel, not to the metal frame. The double sided tape piece just wouldn't hold the box to the metal so I just stuck it on top of the inside plastic piece. When you remove the side panel, you'll understand what I'm saying. Second, I took out my spare tire and ran the wiring through the bottom of the spare tire well. There is a round rubber piece that pops out and I ran the wiring through there and wrapped it around the hitch. I didn't like the idea of the wires hanging out of my back lift gate and this way, they are out of the way. 551940



- C56040
by:
2011 Subaru Outback Wagon

Here's some pics, rather than drill into the floor I used the larger eyelet and a grounding washer and used the strut nut. Went well ! 528134



- C56040
by:

Easy to install if you follow the video. I've had this for over a year and have had no problems. Wires just hang out with my spare tire until I need them. 756668



- C56040
by:

This hitch fit perfectly and only the receiver is visible. All aspects of my purchase were excellent... shipment tracking, estimated delivery, packaging, etc. Thanks much! 749543



- C56040
by:

Simple, easy install with good directions. Works perfectly. 747265



- C56040
by:

Easy plug and play installation. 746990



- C56040
by:

Installation was easy. I drilled one hole for the ground wire and that was it. For installation on a 2020 Outback, they don't have a location for the plug in the instructions. I've included photos. It's tucked underneath the plastic shelf at the back of the spare compartment on the passenger side. You pretty much have to do a headstand to see it. Cut the two pieces of pink tape to make work easier. 746627



- C56040
by:
2012 Subaru Outback Wagon

Easy hook up on Subaru. 2012 outback . Would highly recommend. 746375



- C56040
by:
2013 Subaru Outback Wagon

Great product the instructions and video were right on and easy to follow for installing on my 2013 Subaru outback. 745562



- C56040
by:
2020 Subaru Forester

Easy! 10 minute job. The installation video was accurate and had great suggestions on mounting the wires and tidying up. 745504



- C56040
by:
Subaru

Works great, Subaru makes it a bit difficult to install, but other than that, I have had no issues. 744428


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    view full answer...
  • Can Trailer Wiring be Routed Outside of 2014 Subaru XV Crosstrek Instead of Hanging Out the Hatch
    There could be a way to route a trailer wiring harness through the bottom of the cargo area and out on your 2014 Subaru XV Crosstrek. You will need to remove all the flooring that you can in the cargo area of the vehicle to get down to the metal. Then look for a grommet that you could route the wiring through. If there is no grommet you would have to drill. The weather stripping on the vehicle hatch will protect the harness wires provided the hatch is not closed on the harness. The...
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  • Location of OEM Wiring Connector on 2017 Subaru Outback Wagon
    Thank you for your purchase of Curt 4-Pole Wiring Harness kit # C56040 which is a confirmed fit on your 2017 Subaru Outback Wagon (excluding the Sport Edition). We had the chance to install this harness for a local customer and the linked video shows the installation process. Our technician located the white plastic OEM connector behind the carpet in the front/left corner of the cargo area as shown in the video at the 3:40 mark. Please check your owner's manual starting on page 6-15...
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  • Troubleshooting Trailer Running Light Circuit that Stays On all the Time
    If you have LED taillights on your trailer and they are only partially illuminating then that is normal. If you have incandescent bulbs on your trailer and the light are fully illuminating then the problem is most likely the trailer harness on the vehicle. Use a circuit tester to test the pin on the 4-way for the brown wire to see if there is voltage there at al times. Now test the brown wire going in to the converter box for voltage as well. If there isn't voltage going into the box...
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  • Comparing Curt C56040 and Tow Ready 118467 Wiring Harnesses for 2016 Subaru Forester
    Both the Curt # C56040 and Tow Ready # 118467 4-pole trailer wiring harnesses that fit your 2016 Subaru Forester will install by plugging in to a vehicle connector. This is located in the rear of the vehicle on the driver's side as shown in the linked video at the 2:15 mark. The Tow Ready harness installation will be slightly quicker since it has no separate ground wire to install. There is a notable difference between these two products. The Curt harness can deliver higher current output...
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  • Trailer Wiring Harness Location On 2014 Subaru Forester
    I looked at the installation instructions for your 2014 Subaru Forester and found that the wiring harness is located behind the rear panel on the driver side. The location is very similar to the Crosstrek in the attached video. The video explains how to remove the cargo tray and the panel to access the harness. I have also attached a couple of photos that show the location of the harness per the installation instructions.
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  • Install Video Guide for Trailer Wiring In a 2016 Subaru Crosstrek
    Since the Curt harness part # C56040 that you have for your 2016 Subaru Crosstrek is a fit for a few different models of Subarus we have found that the connector instructions in the install instructions aren't always accurate. The video I attached shows where you will find the connector. It will be behind the driver seat.
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  • Recommended Trailer Connector for Providing Reverse Light Signal on 2015 Subaru Outback
    The Curt 4-Pole Vehicle Wiring Harness # C56040 does NOT provide a reverse light signal on its 4-pole connector, only stop, turn and running lights. The trailer connectors that can carry a reverse light signal will be either 5-pole, 6-pole or 7-pole types. Converting to a 7-way socket that includes reverse, 12V power and trailer brake signals is easy; all you need to add is part # ETBC7 which is a complete trailer brake install kit that includes a 7-way, connectors and wiring to carry...
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  • Why is Grounding Wire Separate on Curt Wiring Harness #C56040 but not on T-One #118467
    After speaking with my contact at Curt, he said that they felt that the ground used for the vehicle's taillights may not be sufficient on the newer vehicle's and could cause the Wiring Harness, # C56040, to not function properly. In an effort to avoid this problem, they separated the grounding wire from the plug in connector and it should be attached to a clean metal surface on the body of the vehicle. You should not have any problems when using the T-One Wiring Harness, # 118467, on...
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  • Location Of The Connecting Harness For Curt T-Connector With 4-Pole On 2017 Subaru Outback Wagon
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # C56040, plugs in with a simple connection in the rear of your 2017 Subaru Outback. Unfortunately, according to my tech contact at Curt, Subaru has not been consistant with where this plug is located. He said they have found them anywhere behind the rear seat to under the carpet near the spare tire, to even taped to the wires behind the tail light. The harness is consistent, but the location isn't other...
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  • Troubleshooting Wiring Harness On 2015 Subaru Forester When Trailer Lights Do Not Work
    Before you replace the OEM harness on your Forester you may want to check a few things. First, check the fuse for the trailer connector in the passenger compartment fuse panel. From my research the trailer connector fuse is in the number 1 slot. You may find that you have a blown fuse and that is why the harnesses you have installed do not work. If the fuses all check out okay, I recommend using a circuit tester like part # 40376 and have someone run through the functions while you test...
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  • Wiring Kit Needed for Dinghy Towing a 2009 Subaru Forester Behind a 1992 Monaco Motorhome
    To wire your 2009 Subaru Forester for dinghy towing behind a motorhome you will need to install a tow bar wiring diode kit like the Roadmaster 6-Diode Universal Wiring Kit, # 154-792-118158, or use removable towing lights like the E-Z Mount Tow Light Kit, # EZT20B. The Tow Ready Harness, # 118467, and the Curt Mfg. Harness, # C56040, are designed to allow you to tow a trailer with your Forester and will not work for flat towing the vehicle because the brake, turn and taillight signals...
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  • Does Curt Trailer Wiring # C56040 Fit 2019 Subaru Crosstrek
    Yes, the Curt trailer wiring harness part # C56040 does fit your 2019 Subaru Crosstrek. This also stores in the rear cargo area when not needed so that it won't be exposed to the elements.
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  • Does Curt Trailer Wiring Harness part # C56040 Fit 2018 Subaru Crosstrek
    Yes, we have confirmed that the Curt wiring harness part # C56040 that you referenced is a confirmed fit for your 2018 Subaru Crosstrek and would work well. I attached an install video for this wiring harness on a similar 2017 Crosstrek like yours.
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  • Recommended Trailer Wiring for 7-Way Trailer Connection on 2017 Subaru Crosstrek
    For your 2017 Subaru Crosstrek, I recommend starting with the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56040. This installs to a factory wiring harness located behind the interior trim panel in your cargo area. You will then need to run this wire to the outside of your vehicle through one of the rubber grommets or along a trim panel. Then you will use the Universal Installation Kit for Trailer Brake Controller # ETBC7 to give you the 7-way you...
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  • Trailer Wiring Harness Recommendation for a 2014 Subaru Impreza Hatchback
    I have a trailer wiring solution for your 2014 Subaru Impreza hatchback, non WRX, non STI but the part # C56040 that you referenced is not confirmed to fit your vehicle so I would not recommend it for you. Instead you would want the Tow Ready Wiring Harness part # 119179KIT as this kit is confirmed to fit your vehicle. This is a hardwire kit that will require you to test the functions of your vehicle taillights and wire them up correctly to the harness. Check out the install video and...
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  • Trailer Wiring Harness Recommendation for a 2012 Subaru Outback Wagon
    Yes, the Curt wiring harness part # C56040 that you referenced will work for trailer wiring on your 2012 Subaru Outback as long as it is not a Sport model. I attached an install video for you to check out as well.
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  • Can Curt T-Connector # C56040 be Used to Charge Trailer Battery
    You can use the Curt T-Connector # C56040 to start with for trailer wiring that will allow you put a maintenance charge on your trailer battery but you'll also need an adapter to convert it to a 7-way so that you could then run the charge cable. You'd need the adapter part # 37185 and then 10 gauge wire like part # 10-1-1 (sold by foot) ran from the black wire through a breaker part # 9510 to the positive battery post of the vehicle.
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  • Troubleshooting Left Blinker/Stop Light Not Working on a Trailer
    It really sounds like the ground is not making good enough contact on the left turn signal/tail light and because of that it is able to draw enough amperage to illuminate the blinker function of your bulb. You should check and make sure its grounding to a clean metal surface. A lot of light assemblies ground through the mounting hardware so you will need to make sure its attached to a clean metal surface. There is a chance the converter box of your setup could be wrong, in order to test...
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  • Why Store the Trailer Wiring of a 2016 Subaru Forester on the Inside of It
    We actually do get this question pretty regularly. Honestly it's better to store the trailer wiring on the interior of the vehicle when possible as it prevents corrosion from forming on the connector due to the elements and prevents the chance of damage from flying debris to either the wire or the connector itself. The Curt harness part # C56040 has been confirmed as a fit for your 2016 Subaru Forester though. I attached an install video.
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  • Can a US 4-Way be Converter to a European 7-Way on a 2011 Subaru Forester
    A European 7-Way trailer connector has the same functions that a US 4-Way has. We do not have an adapter or a harness made with a European 7-Way. If your 2011 Subaru Forester was made for the North American market then you can use the Curt harness, # C56040. However, to get it to work with a European 7-Way, you would need to cut off the 4-Way end and then use another converter, # 118158. You would attach the the white, green, and yellow wires on the input side with the matching colors...
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  • Recommended Trailer Wiring Harness for 2014 Subaru Outback Wagon
    I recommend using the # C56040 which is a plug-and-play unit, while the # 56146KIT is a hardwired option that would need to splice into the existing vehicle wiring. The connector for the # C56040 is usually located along inside of the drivers side wheel well, as shown in the instructions. I will warn you that Subaru is notorious for varying the location of the connector. You might need to check all the other spots shown in the instructions. The # C56040 has a 3 amp capacity for the turn...
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