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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 # C55370
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Custom Fit Vehicle Wiring

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C55370 - Custom Fit Curt Custom Fit Vehicle 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 C55370 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 (247)
  • Q & A (17)
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  • Why etrailer?

Curt Custom Fit Vehicle Wiring - C55370

  • 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 in your rear cargo area. You will have to remove interior trim paneling to access the connection point. Once you've plugged in the T-connector, insert the included 10-amp fuse into the in-line fuse holder.


Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.


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.



55370 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C55370 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C55370

Average Customer Rating:  4.8 out of 5 stars   (247 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.

- C55370
by:
2006 Subaru Forester

Great product. This took under 5 minutes to install. The Forester 2006 had the electrical connector under the floor tray on the passenger side at the very rear under the taillight hidden by a plastic flap. Lift up flap, plug in, then snug the hardware into the side well. You can run the wire and trailer connector through the 1" hole at the rear of the wheel well capped by a large rubber plug so the wire disappears under the spare. 94920



- C55370
by:

I am very satisfied with the part that I've ordered, it fit perfect. Thank you so much ETRAILER. I would rec ommend my friends to ETRAILER. 901394



- C55370
by:

Arrived in less than 48 hours, perfect fit. 899059



- C55370
by:

891883



- C55370
by:

Our Customer Is Happy With The Installation And Function 871911



- C55370
by:

Installation was a breeze! I was highly recommend purchasing the Curt Led 4-way Flat Connector Tester with the T-connector Vehicle Wiring Harness to confirm your harness works. 851475



- C55370
by:
2006 Subaru Outback Wagon

Great Product fit my 2006 Subaru Outback just as described 850864



- C55370
by:

Fast Shipping, good product will buy from again, your product are a time saver and they work well. The last order was for Stock. 837987



- C55370
by:

Works well 826123



- C55370
by:

A great USA made product! Customer service was fantastic. Thank you agin. 829041



- C55370
by:

Wiring harness came in same package as hitch, two thumbs up went right together after we found the wiring was on the left instead of the left. Excellent product. Priced right on both items. 824911



- C55370
by:

Great product, great service, great price, and timely delivery 822276



- C55370
by:
1998 Subaru Outback Wagon

I watched the video but couldn't find the location of the connection. I googled it and some guy had a short video showing it taped in place in the driver's side access panel right behind the tail light. I simply had to remove that access cover and there it was. Everything was easy once I located that. The lights connection works fine. I have a 1998 Subaru Legacy Outback Wagon. 821274



- C55370
by:

Easy to hook up and great price. 814939



- C55370
by:

Plug and play, its was quick and easy to install. 804966



- C55370
by:

The product worked as advertised, and it was fairly easy to install. 800171



- C55370
by:

Clean install works as advertised. Didn’t come with a fuse though. Threw me for a lot bit of a loop 783702



- C55370
by:

Works great 778279



- C55370
by:

Extremely simple to install 773476



- C55370
by:

Fantastic! Excellent product. So easy to install, would definitely recommend 764407



- C55370
by:
2008 Subaru Forester

Simple install. Tks! 764305



- C55370
by:
2008 Subaru Outback Wagon

It went in my 08 Outback so incredibly easy. 756812



- C55370
by:

Super easy to install, truly plug and p lay. 756303



- C55370
by:

Great customer service, very knowledgeable and go out of their way to help! They also have great DIY product comparison and installation videos. 746304



- C55370
by:
2016 Subaru Outback Wagon

Very easy to install once I watched the Youtube Video on installation. Much easier to install than the Harness on my 2016 Outback. I will look forward to testing this in the Spring when I begin to tow my Utility Trailer for yard work! 737793


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Ask the Experts about this Curt Custom Fit Vehicle Wiring

  • Trailer Wiring Harness for a 2006 Subaru Tribeca
    Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Item # C55370 is indeed a confirmed fit for the 2006 Subaru Tribeca. This harness fits a few different Subaru vehicles but we haven't had a Tribeca in to make an installation video. But the manufacturer has tested it on a Tribeca. The video I have linked can be used as a guide since it is a different model and installation will be a bit different. I have also linked the instructions for you.
    view full answer...
  • Location of Wiring Harness Connection Point for 1998 Subaru Legacy Trailer Wiring
    The connector you are looking for can be in a couple places. I attached a picture that one customer sent in that shows where it was on their 1999 Subaru Legacy. The picture shows the left side taillight assembly area. Another customer with a similar Legacy said they found it located in the position described for Subaru Forester (passenger side in spare tire compartment under carpet next to wall.)
    view full answer...
  • Troubleshooting 4-Pole Trailer Wiring Harness on 2008 Subaru Outback Wagon
    Thank you for your purchase of towing components for your 2008 Subaru Outback Wagon including Curt wiring harness # C55370. The yellow wire on this 4-pole harness carries both turn and brake light signals for the left-side light. Since your harness' left side output is always solid (it does not blink) then this suggests that the harness is damaged. Please note that we do offer a custom-fit harness for the 2008 Outback Wagon (as long as it is not the Sport edition), part # 118461...
    view full answer...
  • Where Does Trailer Wiring Plug Into on a 2008 Subaru Forester 2.5XT
    On the 2008 Subaru Forester the connector you are looking for should be rearward of a long junction box with wires going in and out of it on the driver's side based on your pictures. It is potentially concealed by being wrapped up in electrical tape. Follow the wiring coming out of that box and you should eventually come across the connector. But it may not be easily visible and you may need to cut away tape or protective loom to get to it. The wiring branches off and the connector usually...
    view full answer...
  • Trailer Wiring Recommendation for 2006 Subaru Outback Wagon
    She would first need to start with a 4-way on her 2006 Subaru Outback. For that the part # C55370 would be what she would need. Then to convert it to a 7-way you would want the part # 37185. The 4-way would plug into this and then the black wire of the adapter would get ran back to the positive post of the battery through a breaker like part # 9510. That's all that would be needed for the charging circuit to be complete.
    view full answer...
  • Wire Loom and Wire Loom Clamp for Routing Power Wire for 7-way install on a 2003 Subaru Forester
    You are on the right track with all of the products you are planning on purchasing to install the Prodigy RF brake controller part # 90250 and then also leave the option to use a different brake controller in the future. For wire loom I would go with 1/4 inch loom like part # 7509-10 sold in 10 foot sections, and then to secure the loom you could either use zip ties (this is what I did on my car) or you could use the Metal Loom Clamp # A0250 for a more permanent solution.
    view full answer...
  • Can a Trailer Connector be Routed Under a 2011 Subaru Tribeca
    The wiring harnesses like # C55370 for the 2011 Subaru Tribeca are meant to be stored in the vehicle cargo area and then pulled out the back with the rear hatch closed on it (the weatherstripping on the vehicle will protect it) when you need it. In order to route it down under the vehicle you will need to find a grommet or some exit point at the lowest point in the cargo area. If there is no grommet or you find one that is not large enough you will have to drill through the bottom of...
    view full answer...
  • Can the 4-Way Trailer Wiring Harness be Routed Under a 2008 Subaru Tribeca
    On the 2008 Subaru Tribeca you will either need to stow the 4-Way in the cargo area and pull it out of the rear hatch and shut the hatch on the wiring (the weather stripping will protect it, stay away from the locking mechanism) OR you will have to drill through the bottom of the cargo area if no other options are available. Be sure to seal up the hole after you are finished to keep out fumes and moisture.
    view full answer...
  • Trailer Hitch that Fits 1999 Subaru Legacy Outback Wagon
    For your 1999 Subaru Legacy Outback Wagon we have the Draw Tite hitch aprt # 36234 as a confirmed fit. This would be a great choice that has plenty of capacity and installs relatively easy as well. If you were wanting trailer wiring too we have the Curt # C55370 as well.
    view full answer...
  • 2011 Subaru Tribeca Hitch and Wiring Recommendation
    The correct hitch for your 2011 Subaru Tribeca is the Curt Trailer Hitch Receiver part # C13069. This is a custom fit hitch designed specifically for your vehicle. It offers the very versatile 2" reciever tube opening which is compatable with all types of hitch mounted accessories for you to use. Should you have the need to haul a trailer you will need wiring and a ball mount. For this I recommend the Curt T-Connector Vehicle Wiring Harness part # C55370 which is also a custom fit part....
    view full answer...
  • Parts Needed To Tow a Small Boat Trailer With a 2004 Subaru Outback Wagon
    The Curt Trailer Hitch Receiver part # C12270 is a confirmed fit for your 2004 Subaru Outback Wagon and it will work to pull a boat trailer. That said, you will need a few other parts to complete your setup which I have listed for you below. Curt T-Connector Vehicle Wiring Harness part # C55370 Curt Drawbar part # C45519 Curt Pin and Clip part # F-4 Curt 1-7/8" Hitch Ball part # C40001 In regards to installation of the Curt Trailer Hitch Receiver, this is very simple to do yourself...
    view full answer...
  • Recommended Trailer Hitch Receiver For 2005 Subaru Outback XT Limited Wagon With MT Turbo
    For your 2005 Subaru Outback XT Limited Wagon, I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2" # 75560. This is a confirmed fit for all models with the exception of the Sport model, so it will work for the turbo MT model. This trailer hitch receiver is an easy bolt-on installation with the included hardware. It is a square-tube design with a black powder coat over an e-coat base for superior rust protection. The 2 inch receiver will give you...
    view full answer...
  • Parts Needed to Install 7-Way and Curt Echo in 2005 Subaru Outback Wagon with Curt 4-Way
    You can easily use a wireless brake controller like the Curt Echo part # C51180 in your 2005 Subaru Outback Wagon that you are installing the Curt 4-way part # C55370 in. The only other thing you need is a 4-way to 7-way adapter part # ETBC7L. This adapter was actually put together by us for people like you who want to adapt the 4-way to a 7-way to install the Curt Echo. You'll plug in the 4-way and then run one wire to the battery and you'd be set.
    view full answer...
  • Trailer Hitch and Wiring Recommendation for 2004 Subaru Forester
    Best option would be the trailer hitch part # C12038 which is a fit for your 2004 Subaru Forester, but you'd need to verify that your vehicle has the capacity for the pontoon boat. The hitch by itself has a 3,500 lbs capacity. For trailer wiring you'd need the part # C55370 which is a confirmed fit. For a ball mount part # C45503 and then hitch balls # A-82 for a 2 inch ball or part # A-80 for 1-7/8 inch ball.
    view full answer...
  • Where is the Plug on a 2008 Subaru Outback Wagon for Trailer Wiring Installation
    The plug is behind the driver side taillight. You will need to remove several interior panels to access it. To see where the plug is for installing the Curt Wiring Harness part # C55370 check out the video I attached. It's for the Tow Ready version of the harness # 118461. The install will be the exact same.
    view full answer...
  • Trailer Hitch Options and Maximum Weight Capacity for a 2004 Subaru Forester
    After researching your question, I found a couple of sources stating that the towing capacity for a 2004 Subaru is 2,400 lbs. Nonetheless, I recommend double checking your specific owner's manual. Also, if you're looking for a Trailer Hitch, I recommend the Draw-Tite Trailer Hitch Receiver - Custom Fit - Class II - 1-1/4" (300 lbs TW // 3500 lbs GTW) # 36311 Please check out the attached video that highlights why I recommend this particular Trailer Hitch for your vehicle. To...
    view full answer...
  • Parts Needed to Convert 4-Pole Wiring to 7-Way on 2007 Subaru Forester
    We can help you convert your Forester's 4-pole flat type trailer wiring to a 7-way blade style to match the connector on your new trailer that has electric brakes. Once you have a 4-pole installed, such as Curt # C55370 or Tow Ready # 118461, you can convert that to a 7-way using our # ETBC7 brake controller installation kit. This includes everything needed to install the included 7-way trailer socket on the Forester and allow you to install a brake controller like the popular and easy-to-use...
    view full answer...




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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jameson C
Video by:
Joshua S
Video by:
Michael B
Test Fit:
Nicholas E
Test Fit:
Shane H
Video Edited:
Jacob T
Video Edited:
Chris R
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Kristina F
Updated by:
Isabelle B

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