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Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Part Number: C55379
In Stock
$65.73
2013 Nissan GT-R
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CURT Custom Fit Vehicle Wiring - C55379
Highlights
- Custom Fit for Your Vehicle: Works with your vehicle's wiring
- Tow-Ready Setup: 4-way flat connector powers trailer turn, brake, and running lights.
- Plug-and-Play Install: T-connector plugs into tail light ports—no cutting or splicing.
- Reliable Signal Match: Built-in converter combines vehicle lighting signals correctly.
- LED-Safe Operation: Works with both incandescent and LED trailer lamps.
- No Battery Wire Needed: Gets power from tail light circuits for a simpler install.
Features to know about
Installs Fast Without Running Extra Power Wires: Plug-In Harness
Wiring a trailer doesn’t have to mean splicing or routing power all the way to the battery. This CURT T-Connector plugs directly into the ports behind the tail lights and is ready to go once connected. There’s no separate power lead to run, making it a clean, straightforward installation that just works.
Reliable Trailer Lighting Every Trip: Built-In Converter
The integrated converter keeps the trailer lights working right by combining the stop, turn, and tail light signals from the vehicle into a 4-pole output. It protects the factory wiring from overloads and keeps everything operating within the proper 5-amp capacity for the running light circuit. That means solid brake and turn signals every time you hook up.
Compatible with LED and Incandescent Lights: Versatile System
Whether your setup uses modern LED lamps or standard incandescent bulbs, this harness handles both without issue. It’s designed to read signal inputs correctly and deliver proper voltage to any trailer lighting style, keeping everything bright and in sync.
Ready for Adapters and Accessories: Standard 4-Flat Connection
The 4-flat connector gives you standard running light, brake, and turn signal functions and can easily be adapted for 5-way, 6-way, or 7-way systems if you add accessories later. It’s a simple foundation that supports whatever trailer wiring setup you need down the road.
Specs
Wiring and Electrical
- Connector Type: 4-Pole Flat Trailer Connector
- Product Type: T-Connector Vehicle Wiring Harness
- Installation: Plug-In at vehicle’s built-in ports behind driver’s-side and passenger’s-side tail lights
- Converter Included: Yes
- Powered Connection to Battery Required: No
- Compatibility: Fits Toyota Pickup models (excluding T100) and Toyota Tacoma (select model years as confirmed in dataset)
- Light Compatibility: Works with both incandescent and LED trailer lamps
55379 CURT T-Connector - Surface Mount Technology - 4 Wire
Similar to Tekonsha 118379 and Hopkins HM43315
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Product did not meet expectations
- Wrong item was ordered
- Defective
Ratings & Reviews
4.8
229 reviews
by:
Abenaqui
10/25/2026
Simple Installation. Requires further tie-wrapping and tucking along hitch if using a permanently mounted plug-in connector. Works well .....
by:
Luther
08/10/2026
2004
Toyota
Tacoma
Good for the price. Customer service and shipping were excellent. Everything seems to be of decent quality, all of the parts and pieces needed are included, but the gauge of the wires leaves a little to be desired. All and all, well worth the price.
by:
Leonard
03/12/2026
Perfect fit harness plugs into existing wiring with no problems. I had to put the rubber plug cover in the sun to soften it enough to fit. Those of us with trucks can't hide the converter box in a trunk to keep it protected from rain like the instructions prefer. Oh well.
by:
Eric
10/17/2026
Great non powered hitch flat four wiring. Worked great.
by:
Jeffrey
07/01/2026
well-packed, complete harness kit; good instructions; straightforward installation
by:
Del
09/09/2026
Very fast shipping
by:
AUSniper
02/12/2026
2001
Toyota
Tacoma
Wow, way too easy. Ispent more time cleaning the taillight housings than installing this harness.
Gwendolyn Y.
2/12/2026
I'm all about spending less time on a project. More time for all the fun stuff.
by:
Ken
06/27/2020
2000
Toyota
Tacoma
Product was an exact fit for my 2000 Toyota Tacoma. Super easy install. I saved the black plastic flexible wire tubing from my old wiring harness which I think adds a lot of protection. I would recommend buying this type of tubing to use. Also purchased the 4 pole flat bracket to fit the connector which makes for a nice professional finish. It easily screwed into the bottom of the bumper-----just had to drill two 3/32 inch holes. See picture
Overall very satisfied.
Overall very satisfied.
by:
Eric M.
09/14/2016
2003
Toyota
Tacoma
Fast shipment!! Received hitch in a few days. instructions where right on and easy to use. Plus, online there was a video from etrailer on how to install the hitch. Hitch and wiring only took 2 hrs to install. Great product, great service will definitely order from them again! Thank you etrailer!
by:
Patrick
10/09/2025
This vehicle wiring harness is the way to go, just a couple connectors snapped in place at each tail light and route the wires under vehicle, then place 4 pole wire connector in a holding bracket and that's it, your ready to go, diy job takes about 30 minutes at the most, buy this product, you won't regret it.
by:
Paul
06/27/2026
Great kit, super easy install. I went and wrapped all the wiring with a nice cloth tape and hid it with the existing wiring from the manufacturer. Super clean install.
by:
Michael
03/19/2025
Easy to install and works great. Thanks for making the process easy!
Michael
3/20/2026
Works great!
by:
Jake
05/14/2021
Easy install (took maybe 30-45minutes) and works exactly as it should. The wires were all the perfect length with maybe 6” excess per line. Only time I had to pick up a tool other than a screwdriver was for unhooking the battery terminal and drilling the ground wire into place.
by:
Duane
09/16/2025
I installed the receiver hitch today, alone. Not bad for an eighty year old!
The installation process wasn't bad after watching a video. I'm very impressed with the quality of the product. It is very robust!
The installation process wasn't bad after watching a video. I'm very impressed with the quality of the product. It is very robust!
by:
Glenn
07/05/2025
1998
toyota
Tacoma
The harness was extremely easy to install. The inline plug and socket to the existing lights makes it so much more reliable and secure. The only wire to connect was the ground to the frame. I would highly recommend this product to anyone needing a trailer outlet added to their 90's Tacoma.
by:
Richard
05/31/2018
2001
Toyota
Tacoma
This product is terrific. I found some weird wiring that someone did on the left rear light of my truck in the past. Apparently they were trying to get the trailer lights to work by adding direct battery wiring. I wasn't sure what to do so I decided to start by just removing all that extra stuff and installing this kit as per directions. I did that and boom!.... The the tailer lights worked perfectly first time out! I was very surprised... I was sure there would be problems. But there were not! It was just too easy!
Richard
5/31/2019
I Have never had to give my trailer lighting a second thought... Every time I check the lights they always work as they should
by:
Steve S.
10/16/2019
Great produce. As you had told me about some vehicles, that some need help to work in using a wiring harness in lack of power from that vehicle. My 2002 Toyota Tacoma is one that needed help. When I called you back with my find,
you rushed a fix ( freely) to my need quickly for my truck that saved me from missing my hunting trip that I was leaving in less then a week. Great produce from a great company with great employees that care for each need of the public.
When [etrailer] was formed, obviously it was formed right from the top down, thinking about the person, the public.
GOD BLESS
you rushed a fix ( freely) to my need quickly for my truck that saved me from missing my hunting trip that I was leaving in less then a week. Great produce from a great company with great employees that care for each need of the public.
When [etrailer] was formed, obviously it was formed right from the top down, thinking about the person, the public.
GOD BLESS
Steve S.
10/17/2020
Still Great
by:
Matt
09/24/2025
Great product, plug and play was super helpful
by:
Andre
06/20/2025
2002
toyota
Tacoma
Took about an hour to install. Make sure to test with the vehicle engine running so processor is getting full power. Highly recommended unit for a first Gen Toyota Tacoma.
by:
Bud G.
10/31/2014
1995
Toyota
Tacoma
The Curt T-Connector vehicle wiring harness arrived just a few days after placing my order. Everything I needed was included in the package. Installation was so easy even with removing my very old failed harness, installing the new one only took about 30 minutes. Connections were simple and no splicing! I would recommend etrailer to anyone.
Bud G.
10/31/2015
After a year of use it still works perfectly.
by:
M&m Muffler And Automotive
05/14/2020
Had a customer bring in his vehicle and wanted us to splice into his wiring and install his own after market towing lights..needless to say we declined because of the liability and cutting into a wiring harness is never a great idea. So I ordered this towing harness for the customer and it arrived at the shop within 2 days. The customer was impressed with the way it connected into his vehicles wiring without any cutting of wires. The customer was Amazed on how simple it was and was very happy on the install and of course how it worked..., another happy customer is always good and using this type of wiring kit is better and safer when dealing with a vehicles wiring.
by:
Brad
06/22/2016
1994
Toyota
Pickup
Installed in no time. Quick shipping, fit the stock Toyota connector perfectly. All wires are plenty long. Would recommed.
Brad
6/22/2017
Still going strong, pull my trailer once a week and the lights are still working properly,
by:
Paul M
05/05/2024
Well... The electronic controller on the unit I received was bad, giving intermittent connections for the brakes, blinkers and hazard blinkers. I should have called etrailer immediately, described the symptoms and they would have sent me a replacement immediately. Instead, I spent most of a week trying to track down where the bad connection might be.
Now that I have a properly functioning unit, it is wonderful and easy to install. No trying to figure out which wires to tap into.
I do have a suggestion that you test the unit before fully installing it. This is very quick and easy. You have to take the tail lights off or otherwise get access to the taillight plugs to install this unit. Before proceeding further, plug this unit into the wires coming to the taillights and plug the other end into the trailer. If it works, you have a good unit. Unplug the unit and proceed to install it underneath the vehicle. If it doesn't work, call etrailer, describe the symptoms and they will send a replacement.
Now that I have a properly functioning unit, it is wonderful and easy to install. No trying to figure out which wires to tap into.
I do have a suggestion that you test the unit before fully installing it. This is very quick and easy. You have to take the tail lights off or otherwise get access to the taillight plugs to install this unit. Before proceeding further, plug this unit into the wires coming to the taillights and plug the other end into the trailer. If it works, you have a good unit. Unplug the unit and proceed to install it underneath the vehicle. If it doesn't work, call etrailer, describe the symptoms and they will send a replacement.
by:
Glenn Ruis
04/14/2016
It's a great product, and was easy to install took about 30 minutes
by:
Terry Y.
05/11/2019
2003
Toyota
Tacoma
It was an easy plug in hookup to my 03 Tacoma. Only issue I had was I had to convert my trailer lights to L.E.D. from standard lights to make everything work properly. According to the technical advisor at etrailer, the converter from a 5 wire truck harness to the 4 wire used too much power to operate the standard lights.
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Show More Reviews
See what our Experts say about this CURT Custom Fit Vehicle Wiring
- Recommended 4-Way Connector for a 1996 Toyota TacomaHey Jaime. It sounds like you've got a bad trailer connector on your Tacoma or something wrong with the wiring between your connector and your fuse box. A lose ground or corrosion on your connector would be the first place to look. Corrosion can build up behind the connectors where the wires attach. I would start at the connector and work your way towards the front of your truck. You'll want to make sure that the ground wire is attached to a clean bare metal surface on your truck. If...
view full answer... - Recommended Plug in Trailer Connector for a 1999 Toyota TacomaHey Michael! For a wiring harness that plugs into your Tacoma's rear tail lights you'll want the Curt T-Connector item # C55379. This connector will provide you with a 4-way connector. If you need a 7-way connector you'll also have to install the Universal Installation Kit for Trailer Brake Controller item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the rear of your vehicle with an included bracket. This kit is designed for use on a vehicle...
view full answer... - Best Plug-In Wiring Harness For 1999 Toyota TacomaHello Michael, thanks for reaching out. We do offer a plug-in tail light wiring harness for the 1999 Toyota Tacoma. For that, I recommend the following: - Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55379
view full answer... - Recommended Hitch for a 1997 Toyota Tacoma It definitely will! The Curt Hitch item # 13013 is custom fit for all models of the 1997 Toyota Tacoma including your 2WD. This class III hitch has a 2" receiver, is custom fit for your truck, and bolts to it with included hardware. I have linked an installation video below to show you how to get it set up. If you are planning on towing you will also need a wiring harness item # C55379 and a ball mount kit item # C45534.
view full answer... - Troubleshooting Brake/Turn Signal Not Working After Curt 55379 Installation on 1997 TacomaHi Andrew; the first thing I would do is double check the # C55379 connections behind your tail lights. Go ahead and unplug the connectors and then plug them back in to make sure they're fully seated. After that, I would test for power using a circuit tester # PTW2993. Start by testing the wires running into the converter box. Since your vehicle lights work I'm assuming you have power here but it is a good idea to double check. After that check the wires running out of the converter box...
view full answer... - Having Trouble Installing The Curt C55379 4 Flat Harness In A 4 Flat Mounting BracketThe Curt T-Connector Vehicle Wiring Harness # C55379 really should not have any trouble fitting into a 4 Flat bracket, like the # 18144, and we use these together pretty often. I have seen a few instances where the bracket was tighter than usual, but a moderate amount of force got everything snapped into place in very little time. The amount of trouble you are having is not normal by any means. Especially since you are going about it the correct way. This will sound odd, but it may be...
view full answer...
- Differences Between The 4-Way Wiring Options For 2002 Toyota TacomaThere are not many differences between the Tekonsha T-One Vehicle Wiring Harness part # 118379, Curt T-Connector Vehicle Wiring Harness part # C55379 and the Hopkins Plug-In Simple Vehicle Wiring Harness part # HM43315 for the 2002 Toyota Tacoma besides the brand names. They all install the same and will give you a 4-way connector at the rear of the Tacoma to illuminate the trailer's lights. However, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector...
view full answer... - Trailer Wiring Harness Converter Box Failed on a 2003 Toyota TacomaThe converter box alone in a trailer wiring harness such as # 118379 for your 2003 Toyota Tacoma cannot be replaced. The whole harness would have to be replaced. Since you have determined that all of the electrical signals going in are correct but not correct on the output side of the converter this does indicate a bad converter. But, if the converter stopped working because of a short somewhere on the trailer you will want to fix the short or the problem will keep happening. Make sure...
view full answer... - Wiring a Truck Bed Converted into a Trailer with Separate WiringThe # C55379 Curt harness is going to put a vehicle side trailer connector at the back of your truck bed trailer. So it's not going to plug into the connector at the back of your tow vehicle. Instead use the # TR118821 wiring harness that splices into the truck bed's tail lights. Then add the 2-to-3 converter, part # C56196, like you mentioned with 2 extra diodes, part # RM-792, to separate the circuits so you can use the brake lights and turn signals independently.
view full answer... - Trailer Wiring Harness for a 1994 Toyota PickupWe have a harness that can work for your 1994 Toyota Pickup. First, the Tow Ready 17499-204 didn't have much information about it online, so I couldn't determine if it is compatible with your vehicle. The information I did find did not allude to being compatible with your truck. When it comes to wiring your vehicle, it's best to stick with something that is built for your vehicle. That's why I recommend the Curt T-Connector, part # C55379. This is a confirmed fit for the '94 Toyota Pickup...
view full answer... - Recommended Trailer Hitch Receiver For 2001 Toyota TacomaFor your 2001 Toyota Tacoma, I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # 13013. This hitch is a confirmed fit for your truck and will give you a bolt on installation without any drilling required. For your trailer wiring, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55379. This will install behind the tail lights of your truck to your factory wiring plugs. For a ball mount, I recommend the etrailer.com...
view full answer... - Comparison of Tekonsha and Curt Wiring Harnesses for 1999 Toyota TacomaThe amp draw on the product pages for both the # 118379 and the # C55379 wiring harness is how much draw the harnesses are designed by their manufacturers to handle. The amount of draw will be determined by the lights on your trailer. The Curt is designed to handle a little more than the Tekonsha harness, however they've both been tested on a 1999 Toyota Tacoma like yours.
view full answer... - Troubleshooting 4-Way Vehicle Wiring Harness Not Allowing Brake Lights to Work on 2003 Toyota TacomaThe 4-Way Harness # C55379 for your 2003 Toyota Tacoma is going to use the factory wiring to identify when a function is activated and power the trailer connector. Since you mentioned your truck was converted to LED lights if you factory lighting has a resistor installed going to the brake lights this may prevent enough power from getting to the tail lights. You may have to either move the resistor or go with a powered module like the # C59236. This has a separate power wire which runs...
view full answer... - Recommended Trailer Hitch Receiver for 2004 Toyota Tacoma Along With Wiring and Ball MountFor your 2004 Toyota Tacoma, I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # 13013. This trailer hitch is rated for 500 lbs tongue weight or 600 lbs when used with weight distribution system. It is a custom fit bolt on installation and comes with all the hardware needed to install. It has a black powder coat finish over a protective base coat for excellent rust prevention. It is a sturdy square tube design that is 100% made in the USA. For your trailer wiring,...
view full answer... - Troubleshooting Plug and Play T-Connector Trailer Wiring Harness Not Working on a 1992 Toyota PickupAs long as your vehicle is a 1992 Toyota Pickup and not some other model like a T100 pickup, you have the correct wiring harness. There are two possibilities for the symptoms you are describing. A ground issue or a short between the taillight circuit and turn signal circuits. Because there would need to be a short between both the left and right turn signal circuit and the ground I would think that would not be the issue, unless the converter box has been shorted out. Since you have already...
view full answer... - Troubleshooting 4-way Connector On 1992 Toyota Pickup Having Power But Not Powering Trailer LightsSince you tested the T-Connector 4-way connector on your 1992 Toyota Pickup 4WD V6 and the tester showed that all of the functions are working but you are not getting trailer lights then there is one troubleshooting step to try. Plug the trailer into the trucks connector and turn on the turn signals or have a friend apply the brakes. Using a circuit tester like # PTW2993 test the wires on the vehicle side connector, and if you have power there then test the wires on the trailer side connector....
view full answer... - 4-Pole Wiring Harness for 2002 Toyota TacomaWe offer two trailer wiring harnesses for your 2002 Toyota Tacoma, the Draw-Tite # 118379 and the Curt # C55379. Both harnesses are the plug-and-play type that will install in a similar manner at your Tacoma taillight assemblies as shown in the linked video. Given your choice of trailer lighting kit # TL5RK I suggest you opt for the Curt harness since it offers higher current output capacity than the Draw-Tite. Curt # C55379 provides maximum output of 3 amps per stop/turn circuit and 7.5...
view full answer... - Troubleshooting Running Lights and Brake Lights on Trailer Connected to 2004 Toyota TacomaIf you are using an aftermarket 4-pole wiring harness like # 118379 or # C55379 in your 2004 Toyota Tacoma you can troubleshoot the lighting issue in several ways. First, check that the truck's own lights all work correctly. The harnesses like those noted above plug in to the truck tail light assemblies to get the lighting signals. If the truck's own lights do not function there will be no signals for the harness. If you unplug the harness and test the truck's lights and find that they...
view full answer... - Troubleshooting Blown Headlamp and Tail Light Bulbs on 2002 Toyota Tacoma After Harness InstallSince the truck is 17-years-old my first suspicion is that the bulb sockets/connectors for the left headlamp and/or left taillight could have corrosion that is causing a dead short that takes out the bulbs. There could also be worn insulation for that circuit's wiring that makes intermittent contact with a metal structure due to vibration when driving the truck. This would explain why the bulbs may work when the vehicle is still but fail when you drive. Normally the fuse for the headlamp/running...
view full answer... - Trailer Turn Signals Dont Work After Installing T-Connector # C55379 on a 1996 Toyota tacomaIf the brake lights and running lights work on your trailer but not the turn signals then I don't think the issue is with the Curt T-Connector # C55379 on your 1996 Toyota Tacoma. I think it is on your trailer. Nevertheless you can still verify that the Curt T-Connector is working properly by using a circuit tester # PTW2992 to test the various light functions. The running lights will be on the brown wire while the green will carry the right turn/stop and the yellow will carry the left...
view full answer... - Does the Curt T-Connector Wiring Harness # C55379 Need to be Run to Battery on Toyota TacomaThe Curt T-Connector Vehicle Wiring Harness # C55379 referenced in your question is confirmed to fit your 2002 Toyota Tacoma. This custom harness will install by connecting directly to the built-in ports located behind the driver's-side and passenger's-side tail lights. You will need to remove the tail light assemblies to access the harness. Once connected, this will complete your installation. This particular harness does not need to be run to the vehicle's battery with an additional power...
view full answer... - Troubleshooting Vehicle Fuses Blowing When Trailer Coupler Connects to Hitch BallIt sounds like there is a short somewhere in the wiring. First, make sure that both the vehicle side and trailer side connectors are free of dirt and corrosion. If the connector is corroded or dirty, it can cause excess power draw and blow a fuse. Simply clean out as needed. To start testing on the vehicle, you will want the change all of the blown fuses and then using a circuit tester like # PTW2993, test the vehicle side connector. You'll need some help so someone in the vehicle can...
view full answer... - Recommendation For A Hitch For A 1996 Toyota TacomaA Class III hitch that is a confirmed fit for your 1996 Toyota Tacoma is the Curt Trailer Hitch Receiver, Item # 13013. This 2 inch hitch is a bolt-on installation with a gross trailer weight capacity of 5,000-lbs and a maximum tongue weight capacity of 500-lbs. However, your total towing capacity is limited to lowest maximum capacity of any of the pieces of your towing setup including your vehicle. You may made need additional parts for your project like trailer wiring and a ball mount....
view full answer... - Troubleshooting Fuses Blowing With Curt Trailer Wiring Harness On 2003 Toyota TacomaIt sounds like the converter is bad on your Curt T-connector # C55379. Since you re-grounded it, the harness should function correctly unless there is an issue with the converter because your vehicle lights are working. I recommend going with the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118379. If you have the same issue with this connector, then there is more to your issue than the harness and we will need to do further testing, but right now it does...
view full answer...
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Info for this part was:
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Mike L.
3/12/2026
Hey Leonard, as long as it's not located in a place where it'll get submerged the converter box will handle rain just fine.