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Upgraded Circuit Protected Tail Light Converter Hardwire Kit w/ 4-Pole Connector and Circuit Tester

Upgraded Circuit Protected Tail Light Converter Hardwire Kit w/ 4-Pole Connector and Circuit Tester

Item # 119178KIT
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Our Price: $37.08
Trailer Wiring

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119178KIT - Vehicle End Connector Tekonsha Trailer Wiring
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Adapts import and domestic vehicles with separate turn and stop lights (3-Wire System) to standard trailer tail light wiring (2-Wire System). Lowest Prices for the best trailer wiring from Tekonsha. Upgraded Circuit Protected Tail Light Converter Hardwire Kit w/ 4-Pole Connector and Circuit Tester part number 119178KIT can be ordered online at or call 1-833-496-1390 for expert service.
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Tekonsha Trailer Wiring - 119178KIT

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • Tekonsha

Adapts import and domestic vehicles with separate turn and stop lights (3-Wire System) to standard trailer tail light wiring (2-Wire System).


  • Short circuit protection safeguards itself and the tow vehicle against harmful electrical shorts and mis-wire situations
  • Circuit automatically resets once the module cools
  • Adapts a 3-wire system on the towing vehicle to work with a 2-wire system on the trailer
  • Works with trailers that have either LED or incandescent bulbs
  • Works with most multiplex wiring systems
  • Includes circuit tester and (5) quick splices to aid in installation
    • Also includes 4-pole trailer connector cover


  • Wire pigtail measures 18" long
  • 4-Pole trailer connector is 60" long from converter box
  • Limited 1-year warranty

Adapts import and domestic automobiles with separate turn and stop lights (3-Wire System) to standard trailer tail light wiring (2-Wire System). In a three wire system, a separate wire is used to carry each of the stop, turn, and running light functions to the tail light assembly. On most trailers, the stop and turn signal functions are sent through the same wire.


Overloading circuits can cause fires. Do not exceed:
  • Maximum stop/turn light: 2.1 amps per circuit
  • Maximum tail lights: 7.5 amps

Read vehicle's owners manual and instruction sheet for additional information.

Kit Includes:

  • Circuit protected tail light converter (119178)
  • Circuit tester
    • To help find wires behind vehicle tail lights
  • (5) Quick splice wiring connectors
    • Makes tapping into wires quick and easy
  • Integrated 4 Pole Cover
    • Protects 4-pole trailer connector from the elements and reduces dirt, debris and corrosion for trouble-free use

119178KIT Circuit Protected Taillight Converter with 4-Flat End, Circuit Testers and Quick splices

Installation Details 119178KIT Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

Upgraded Circuit Protected Tail Light Converter Hardwire Kit w/ 4-Pole Connector and Circuit Tester - 119178KIT

Average Customer Rating:  4.6 out of 5 stars   (364 Customer Reviews)

Adapts import and domestic vehicles with separate turn and stop lights (3-Wire System) to standard trailer tail light wiring (2-Wire System).


Paid about $XX more than I would have on [another website] and waited several more days only to get what looks like a used unit in a padded bad. No original packaging. No directions. Will no shop here again.

I will have Customer Service reach out to you. I also wanted to make you aware of our Price Pledge program, if you have found a lower advertised price with the same item in stock, we would like to know about it. For your help, we will refund you 110 of the difference in the delivered price cost of product plus shipping and handling charges within 30 days of your purchase. This offer is valid on the identical product and model number. I have attached the page to detail the program more thoroughly.
-- Etrailer Expert Thomas M - 01/27/2022

1997 Toyota Corolla

Quick shipping! Helpful customer service rep on the phone. Installed everything myself (lucky me I had an auto lift to use), bought a 4x8 flatbed trailer on craigslist, and pulled a piano, desk and other furniture about 250 miles with my 1997 Toyota Corolla.

Thanks a bunch for the great product!


I was a little skeptical of this product because it didn't come with instructions. But I looked it up on[line], and it worked exactly as advertised. Thanks, etrailer.


Worked perfect for my Ural Gear Up, thank you.


My order just arrived. I have not installed it all yet. I know everything will be just fine. I have installed products from for a garage I worked for, and a hitch for My Dad's vehicle. This one is for Me. Good quality products and outstanding customer service all at a great price. Thank You I am already satisfied with this purchase. Peace

2004 Volkswagen Jetta

This product was delivered to me in factory condition, with more quick splices than needed for the job in the case I messed up. There is even a circuit tester included. Useful if you don't already have one.

This product was very simple to install and works perfectly fine.


After installing it lasted about 3 weeks then quit working

These typically last a long time. I am wondering if your ground has lost connection or is corroded, which is the most common issue with these. Also, check to see if a fuse has blown. In this attached help article, there are more tips to try:
-- Etrailer Expert Sierra K - 05/20/2022


All parts were delivered promptly. Hitch ball, electrical wiring, connectors and small parts were carefully boxed separately inside a large box which contained the hitch. I appreciate your careful attention to ensure that nothing was lost during transit.

1997 Nissan Altima

Like others mentioned. This cured the problem when wiring a 4 pin trailer connector directly my 1997 Nissan Altima. I couldn’t get my signal lights and brake lights to work at the same time. This convertor combines tow vehicle brake wire into signal wires so signal and brake current can travel down single wire in trailer to lights. Works great. I thought I could get by without this converter when wiring car electrical but I was wrong.

1994 Mazda Miata

Good quality, but no instruction manual

The harness should have come with an installation manual. You can find it on the product page as a PDF file called installation details.
-- Etrailer Expert Jenny N - 06/21/2022

2001 Volkswagen New Beetle

Waiting for my trailer to install this, but it's got everything I need. Saved a good bit of money by buying this kit from etrailer and installing it myself.

Works great! Im actually getting 5 way motorcycle lights separate stop znd signal while Towing the small trailer with my car. Wiring was a snap.
ggeorge - 09/21/2021


This turned my seperate turn and brake lights into the standard combined brake and turn flat 4 set-up.

It works great. Ive pulled a small cargo trailer behind the motorcycle and the lights have never failed me.
Lee P - 06/11/2019


Easy to wire, easy to hide out of view. Great product!


Works good. Easy install


works well and was fairly easy to insta ll

2007 Kia Sportage

Installation went Just about as I expected. Working alone it took me about 1 1/2 hours, not counting the wiring harness ( 62 year old guy). I installed one of your hitches several years ago so I knew about what to do. The video was a big help. The only tools needed were a ratchet, screw driver,ramps,and a can of WD40. I left one of the 3 rubber exhaust supports (hangers) in place. It gave some support to the muffler so the pipe wouldn't bend, but everything dropped down low enough slide the hitch into place. 2007 Kia Sportage w/ single exhaust.

2007 Toyota Avalon

The 2 stars are for the lack of ANY correct instructions ( none were in the package, so i relied on the videos published by etrailer) for my 2006 Toyota Avalon . Once i determined the proper hookup the unit itself seems fine .

The closest instruction i could find was the video for the 2007 Toyota Avalon . i used it for the instructions. Turns out, it is not correct for the 2006. After several hours of volt and ohm meter readings and swapping cars to verify that my trailer harness wiring was OK , i noticed that the low side of the bulbs for the rear lights were not attached anywhere to a car chassis ground. Then i determined that the white ground wire and lug( car side wiring of the unit) for the 119178 was NOT to be attached to the car chassis ground but to a low side wire in the wiring harness( black and white). Everything worked fine with that correction.
I also found the note attached to the red wire confusing as it had different attachment instructions that depended on whether one was using a 2 wire or 3 wire system. Again no description to help me tell what system i had( 3 wire).
Instructions and or a schematic would have raised my evaluation to 4 stars( 5 stars being reserved for longtime reliability).


Easy install, still works great one year later.

2006 Honda Element

Works great for my 2006 Honda Element, and video was incredibly helpful. Wish the green wire (for running to right turn signal) was longer; had to splice another wire on to extend it. Otherwise perfect, and a great value!

2006 Honda Element

Just what I needed, looks good.

Mitsubishi Montero Sport

I needed a hard-to-find hitch for my '98 Montero, overnight, no less. I ordered this part along with a harness from etrailer with overnight shipping. I don't live at the end of the world, but you can see it from here, so I wasn't optimistic about everything arriving on time for my trip. Shortly after the order was placed I received emails from etrailer's staff indicating the part wasn't at their main warehouse and would have to be sourced from another. They updated me throughout the day and the following morning. The parts arrived early afternoon. Installation took little time at all with their helpful wiring harness install video. Great thanks to George J, Bridget A and Madison H and others for seeing this through.

2011 Hyundai Accent

The hitch it self was excellent and the service was real good. The wiring kit came with no directions. The stuff online for it was not that good. It all did work out well but it took time and the weather was not nice. It should have said universal wiring and I would not cared. Next time I'll be more careful. This is a good company to deal with. This is the first complaint I've ever had.

2010 Hyundai Accent

Great wiring harness at a great price. A little difficult to install (not the wires fault, it was all due to the car itself, which was virtually impossible to access the rear wiring) however, once I got to the wires, the install was very simple. I could have used some paperwork telling me what the wires were, but I read other reviews beforehand saying the same thing, so I was not surprised. I LOVED the included tester! VERY fast shipping, too!

One year later... still a great hitch wiring harness. Has held up well with moderate use.
Midwest F - 08/13/2014

2000 Mitsubishi Montero Sport

Great Product, my 2000 Mitsubishi Montero now is ready. Thanks!

1999 Ford Taurus

Wires weren't marked as to what was
what, with exception of one. figured they were pretty much standard wiring colors for trailer, still had to find out to make sure. Little included circuit tester works well, saves time having to find mine. Other then the unmarked wires, product works well. That's why I dropped it one from top rating

Everything is working great, was easy install. Thanks for followup.
Mark J - 07/14/2014

Show More Reviews

See what our Experts say about this Tekonsha Trailer Wiring

  • Tow Ready Trailer Wiring Harness Recommendation for a 2004 Volkswagen Jetta
    The trailer wiring harness part # 119178 that you referenced is a confirmed fit for your 2004 Volkswagen Jetta but you would actually want the part # 119178KIT instead as it comes with a circuit tester and some quick splices to make the needed connections. If you happen to already have those parts then all you would need is the # 119178.
    view full answer...
  • What is the Correct Wiring Harness for a 2006 VW Jetta
    For your 2006 VW Jetta, you will actually need Tow Ready Wiring, # 119178KIT. This kit is for the 4 door sedan model. The kit comes with everything you will need to install it on your vehicle. Your 2006 VW Jetta has a multiplex wiring system. To wire your vehicle you will need to take the following steps: Note: You may need to test the wires using a Circuit Tester like # 3808. 1) Start by opening the trunk to locate the carpeted access covers to the tail light plugs on each side. 2) Locate...
    view full answer...
  • Install Instructions for Upgraded Circuit Protected Tail Light Converter Hardwire Kit
    The install instructions for the Upgraded Circuit Protected Tail Light Converter Hardwire Kit part # 119178KIT or part # 119178 are attached to this page for you. The instructions are the same for both models, the former simply comes with a circuit tester and connectors.
    view full answer...
  • Trailer Wiring Harness for 2002 Hyundai Accent GS Compatible with LED or Incandescent Lights
    For your 2002 Hyundai Accent GS, I recommend the Upgraded Circuit Protected Tail Light Converter Hardwire Kit w/ 4-Pole Connector and Circuit Tester # 119178KIT. This harness will work well with your vehicle lights (both incandescent and LED) as well as your trailer with LED lights.
    view full answer...
  • How To Install US 4-Way On 2006 BMW 530 with Euro 7-Way
    In order to install a US 4-way on a 2006 BMW 530 with Euro 7-way, you'll need to install a new trailer wiring harness and just splice into the tail light circuits. The Upgraded Tail Light Converter with 4-Pole Flat Trailer Connector part # 119178KIT will work well for this and it comes with everything you need. They don't make an adapter for this which is why you will need to splice but you can also keep your Euro 7-way as well with this option.
    view full answer...
  • Trailer Flasher Lights Do Not Work When Running Lights Are On
    It does sound like a classic ground issue you are having on the trailer since the flashers do not work when the running lights are on but work when they are off. The running lights have a bigger draw on the wiring and if the ground is not sufficient the other lights will not operate properly. I recommend to make sure all of the grounds on your vehicle trailer connector and your trailer are properly grounded to a clean bare metal surface. Running a ground jumper wire from each light to...
    view full answer...
  • Troubleshooting No Trailer Turn or Stop Lights on a 2013 Ram 2500
    For trailer wiring you will have right turn/stop and left turn/stop circuits so you definitely have 2 different spots where this problem is occurring. If the fuse box on your 2013 Ram 2500 is showing those functions but your 7-Way on your Ram isn't showing those signals then you've got some issues like damaged wiring or a bad ground on your OEM wiring. The only connector kits that we have are for plugging directly into an OEM 7-Way so you'll either need to find the issue yourself, take...
    view full answer...
  • How Much Wire Comes With The Upgraded Circuit Protected Tail Light Converter Hardwire Kit?
    When buying the Upgraded Circuit Protected Tail Light Converter Hardwire Kit w/ 4-Pole Connector and Circuit Tester # 119178KIT for your 1992 Toyota Tercel you will get a Wire pigtail measures 18" long and the 4-Pole trailer connector is 60" long from converter box. I've included some videos for you so you can get a good look at what comes with the kit and see how this installs.
    view full answer...
  • Right Turn Signal Only Flashes with Brake Applied
    If you are using the Upgraded Circuit Protected Tail Light Converter Hardwire Kit part # 119178KIT which is the page that you asked the question from then there would appear to be an error in the wiring. For starters, the above can be installed in one of two ways depending on if the vehicle has separate or combined brake and turn signals. If the vehicle has separate brake and turn signals then the yellow and green wires will go to the right and left turn signal circuits and the red wire...
    view full answer...
  • How To Install a Tekonsha Wiring Harness On a 1995 Jeep Cherokee
    In order to install the Upgraded Circuit Protected Tail Light Converter Hardwire Kit part # 119178KIT on your 1995 Jeep Cherokee you will need to run each of the signal wires to the correct circuits which the best place to access these will be directly behind the taillights. If you need help with this you can use the video I have attached for you as a reference though it is not on a Jeep Cherokee. I am not sure what harness you are referring to but the above is the correct method to install...
    view full answer...
  • Can 4-Way Hardwire Kit be Used to Bypass 2003 Dodge Ram TIPM Wiring
    Thanks for the nice words! And I definitely don't blame you for not wanting to repair the TIPM issues you are having on your 2003 Dodge ram. It is both costly and unnecessary because you were on the money, you can install the Circuit Protected Tail Light Converter Hardwire Kit # 119178KIT. You do need to be aware that while you can do this you will have to locate the truck's tail light wires in the engine compartment to connect to the input side of the wiring harness.
    view full answer...
  • Circuit Protected Taillight Converter with 4-Pole End for a 1999 Plymouth Breeze
    You are correct, there is not a T-Connector for your vehicle. You will need to hardwire your vehicle using a Taillight Converter. I would recommend the Upgraded Circuit Protected Taillight Converter with 4 Pole End, part 119178KIT. This kit comes as an installation kit which has all the items needed to assist with the install.
    view full answer...
  • What Trailer Wiring Harness do I Need for a 1991 Acura Integra
    There are no plug-in style trailer wiring harnesses for the 1991 Acura Integra. To wire your vehicle for towing, you would need to hardwire the connector into the existing lighting circuits. We offer a Taillight Converter with 4 pole Connector, which also includes an installation kit. The part number for this kit is part # 119178KIT. The converter would attach to the existing tail light circuits in your Integra. The easiest place to access this wiring would be behind the taillight assemblies....
    view full answer...
  • Using Part # 119178KIT to Wire a 2004 Ford Escape
    Since your vehicle did not come from the factory with a hitch installed, there is no factory installed trailer wiring. You will need to hardwire a trailer connector using part # 119178KIT. Simply access the tail light assemblies from the rear, and use the included circuit tester to identify which circuit controls which function, then make your connections as necessary. Start by activating the left turn signal. Use the circuit tester to probe the wires exiting the taillight assembly on the...
    view full answer...
  • What Part do I need to Convert My 1990 Ford Aerostar that has Separate Turn and Brake Lights
    What you will need is a Tail light converter like part # 119175KIT. This item takes the two separate signals from the brake and turn signal functions, and allows them to use the same wire and bulb on the trailer. The kit contains everything you need to complete the installation.
    view full answer...
  • Wiring a 2002 Volkswagen New Beetle
    The best way to find the correct wiring to attach the converter is to use a circuit tester to determine which wire serves which function. The best spot to access the wiring is behind the taillight assemblies. According to the information I have, the 2002 Beetle uses a separate wire for the brake and turn signals.
    view full answer...
  • Electrical Trailer Wiring Harness for 2004 Dodge Stratus
    Yes the # 119178KIT is the correct wiring for your 2004 Dodge Stratus. You will have to hard wire into the vehicles taillights and run a wire to the battery with an inline fuse. I have provided a video to help you with installation and a link to our wiring page below.
    view full answer...
  • Trailer Wiring Harness Options for a 1993 Ford F-150
    Based on what I have found on the 1993 Ford F-150, you would use one of the wiring harnesses in the link I have provided. This truck should be a 2 wire system with combined turn signals and brake lights. If yours does have separate turn signals and brake lights you would need a converter like # 119178KIT that you referenced. It takes the separate brake and turn signals and combines them.
    view full answer...
  • Trailer Wiring Harness for 2000 Hyundai Elantra Wagon
    There isn't a plug-in wiring harness for the 2000 Hyundai Elantra Wagon. The hardwire I recommend is the Tekonsha # 119178KIT. It's a very reliable and versatile harness.
    view full answer...
  • Installing a Wiring Harness for Trailer Lighting on a 1996 Subaru Sidekick
    You will need to use a Circuit Protected Taillight Converter, part # 119178KIT, and hard wire it into the existing vehicle wiring. The procedure for installing the converter is pretty simple. Simply access the wiring behind the taillight assemblies, and using the included circuit tester, locate the correct circuits to tap into. You will see 5 blunt cut wires on the wiring harness. The functions of the wires on the wiring harness are listed below. Brown - Tail Lights Yellow - Left Turn...
    view full answer...
  • Trailer Wiring Harness for 2001 Mercury Villager
    The 4-Pole Hardwire Kit with Converter, part # 119178KIT is the correct trailer wiring harness for your Mercury Villager. The kit also includes quick splices for tapping into the existing wiring and a circuit tester for verifying your connections. I have linked you to the install instructions, as well as to an install video that you might find helpful. The video shows the part being installed on a different vehicle, but the procedure would be similar for your Villager, especially the procedure...
    view full answer...
  • Installing Trailer Wiring Harness # 119175KIT on 2007 Suzuki XL7
    As the # 119175KIT is not a vehicle specific item, there are not any instructions available specific to the 2007 Suzuki XL7. You would need to access the wiring harnesses feeding the tail light assemblies, and use the circuit tester included with the kit to test the wires to determine which circuit serves which function. Turn on the running lights, and probe the wires feeding the tail light assembly until you find the wire with voltage on it. Tap the brown converter wire into that circuit....
    view full answer...
  • Trailer Lights Are Not Working With Factory Connector On My 2004 Ford Escape
    If your vehicle was not manufactured with the factory tow package the connector will be in the proper place but it will not have the wiring completed to it. In this case you will need to hardwire your vehicle with a 4-Pole Hardwire Kit with Converter, item # 119178KIT. This kit includes everything needed to hardwire your vehicle with a 4-way trailer connector and a circuit tester so you can find the correct wires to splice into and check your 4-way connector when the wiring is complete.
    view full answer...
  • Trailer Wiring for a 2000 Toyota Corolla
    I apologize, but there are no T-One harnesses available for a 2000 Toyota Corolla. The part # 119178KIT would be the right kit to install trailer wiring on your Corolla. The 2000 Toyota Corolla did not come with LED tail lights from the factory. Double check your car to see if you see a bulb in the tail light housing. If it is a traditional bulb meaning it has a filament and looks like a small version of a household bulb, then it will not be LED. I have included a link to a video of this...
    view full answer...

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