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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
Our Price: $44.90
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). Great 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 1-800-940-8924 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 Satisfaction Score:

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   (367 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).

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!

A year in, no issues, been hauling a few trailers around a bunch!
Jody - 10/05/2022


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


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.


Easy to install. Works great after having this for over a year.


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

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!

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


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


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


Worked Great!


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

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.


Works good. Easy install

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


works well and was fairly easy to insta ll

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


Easy install, still works great one year later.

2006 Honda Element

Just what I needed, looks good.

2003 Mazda Protege

I installed it on a 2003 Mazda Protege. It was easy to install and it worked correctly. You will need a second person to work the lights so you can identify the correct wiring.

After a year the wiring is still working correctly.
Drew - 12/04/2016


Very easy to install. Comes with everything needed. I highly recommend this wiring kit.

Show More Reviews

See what our Experts say about this Tekonsha Trailer Wiring

  • 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...
  • 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...
  • 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...
  • 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...
  • 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...
  • Is there a Plug In Wiring Harness for the 2005 Honda Element
    I checked with several of my sources just to be sure and although the connectors may be present, on your 2005 Honda Element, the trailer tow wiring is not completed to these connectors. Your vehicle will require hard wiring for a 4-Way trailer connector. I would recommend the Upgraded Circuit Protected Taillight Converter Hardwire Kit with 4 Pole End (Includes Testers), item # 119178KIT, for your vehicle. This wiring kit includes everything needed to complete the installation including...
    view full answer...
  • Wiring Instructions for a 2005 Mini Cooper S Convertible
    You will need to hard wire your Mini Cooper S Convertible for trailer wiring. The Upgraded Circuit Protected Taillight Converter Hardwire Kit with 4 Pole End (Includes Testers), item # 119178KIT, is the correct wiring harness for your vehicle. You will need to access the tail light wiring behind the tail lights and use the included circuit tester to identify the left turn, right turn, stop and tail light wires. Once these wires are identified you will splice the yellow wire to the left...
    view full answer...
  • Can the 4-Pole Hardwire Kit with Converter 119178KIT be Used With a Trailer With LEDs
    Yes, the 4-Pole Hardwire Kit with Converter (Includes Tester), # 119178KIT, will work. It will work with LED lights on the trailer and/or on the tow vehicle.
    view full answer...
  • Upgraded Circuit Protected Taillight Converter Hardwire Kit for a 2004 Hyundai Elantra
    The correct vehicle wiring for the 2004 Hyundai Elantra is the Draw-Tite Wiring, # 119178KIT. It comes with an upgraded circuit protected taillight converter hardwire kit with 4 pole end. I have included a link with instructions for a similar product. The wiring situation will be the same though.
    view full answer...
  • Available Trailer Hitches and Wiring Harnesses for a 2002 Montero Sport
    We do have trailer hitches and wiring available for the 2002 Mitsubishi Montero Sport. I have included a links to the Montero Sport hitches below. There are some videos for the Sport model and the hitches will install the same on the 2002 as the 2003. All of the hitches come with instruction links on the right hand side of the product pages so you will be able to see ahead of time exactly what a hitch installation entails. As far as wiring, the Sport model uses the Tow Ready Wiring, #...
    view full answer...
  • How Do I Install Wiring Kit 119176KIT on a 2002 Mercedes E320
    Part # 119176KIT is a universal fit item as it will fit virtually any vehicle. There are not vehicle specific instructions available for it, but there are general instructions and we do have some videos that should be a big help. I have added links to videos showing this kit being installed on a 2000 Cadillac DeVille and a 2002 Honda Civic.
    view full answer...
  • Installing Upgraded Circuit Protected Taillight Converter # 119178KIT on a 1999 Hyundai Santa Fe
    There is a way to find the correct wires. But wiring color is never exact, even within vehicles from the same manufacturer, so I cannot tell you definitively what color wire on your 1999 Hyundai Sonata matches which wire on the # 119178KIT harness. You will have to use the included circuit tester in order to find the correct wires. First, you will access to the wires behind the taillight assembly. The white wire will attach to an existing ground point or the vehicle frame. Using a circuit...
    view full answer...
  • Installing Circuit Protected Taillight Converter Kit # 119178KIT on a 2002 Mercury Villager
    I will happy to walk you through installing the Upgraded Circuit Protected Taillight Converter Hardwire Kit, # 119178KIT, on your 2002 Mercury Villager. First, you will need access to the wiring behind both taillights. This may require removing some panels in the rear cargo area and screws on the taillight housings. Once you have access to the taillight wiring, you will use the included circuit tester to find the right wires to connect to the harness. The first thing you will want to...
    view full answer...
  • Installing Tail Light Converter Part # 119178KIT to 1998 Buick Park Avenue
    The easiest place to access the wiring that you would need to tap into is behind the tail light assemblies inside the trunk. Pull any carpet or lining away from the rear of the tail lights, and locate the wiring harnesses exiting the tail lights. Start on the drivers side. Ground the white wire to clean metal on the inside of the trunk. If you can find a factory grounding point nearby, go ahead and use it. Otherwise, use a self-tapping screw. Then, have a helper turn on the left turn signal....
    view full answer...
  • Instructions for Installing Tail Light Converter Kit 119175KIT on a 2000 Volkswagen Jetta
    The # 119178KIT tail light converter is a universal application, so vehicle specific instructions are not available for your 2000 Volkswagen Jetta. But I have included a link to the instructions for you. You will need to use the included circuit tester to determine which wires behind your vehicle taillights are performing which function, and connect the wires from the converter accordingly. First, you will need to access the back side of your tail light assemblies, where the wires...
    view full answer...

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