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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

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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 800-298-1624 for expert service.
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Tekonsha Trailer Wiring

  • 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

Item # 119178KIT

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   (352 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).

- 119178KIT

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

- 119178KIT

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

- 119178KIT

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.

- 119178KIT
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.

- 119178KIT
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!

- 119178KIT

Worked perfect for my Ural Gear Up, thank you.

- 119178KIT
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

- 119178KIT
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.

- 119178KIT

After installing it lasted about 3 weeks then quit working

- 119178KIT
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!

- 119178KIT
2000 Mitsubishi Montero Sport

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

- 119178KIT

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

- 119178KIT

I just installed my trailer wiring harness I purchased from For the do it yourselfer that can trace and figure out which wires are needed to splice into, it is a very good kit. I chose to solder my connections instead of using the supplied crimp connectors. I've seen these connectors corrode after a few years and then you have to eliminate it and fix the connection. Also, I chose to attach the converter to the frame with a heavy duty tie strap instead of using the adhesive pad that is attache to it. The only other thing I might suggest is a self drilling screw to attacht the ground wire. Having said all that, I would highly recommend this Kit. It saved me between $400 and $900 dollars according to the horror stories I've read online. You Guys need to get this product out there, maybe go to some Dodge forums. Good Job.

- 119178KIT
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).

- 119178KIT
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.

- 119178KIT

Works fantastic, all solid state and well sealed. Resilient to moisture. Easy to Install if you are mechanically inclined. A must have if you are installing a trailer wire harness on a vehicle that has a separate brake light circuit from the the turn signal light circuit.

- 119178KIT

easy install per online instruction, but there was no written instructions with the product.

- 119178KIT
Toyota Yaris

The new hitch arrived today, everything was in the box that I ordered. Very Very nice product. I must admit I was kind of expecting a cheap looking hitch. But this is first class stuff. I'll be using it on my Yaris shortly. Rather than spend a bunch of money on a pickup truck. A 4 x 8 trailer will be hauling my home repair products from now on. Also, I will be coming back to "etrailer" for a bike rack to fit the new hitch. I highly recommend "etrailer", with the on-line assistance and very nice products. You can't beat the price either. The local uhaul wanted double the money I spent at "etrailer" to install the hitch and wire it. It took me 25 minutes to install the hitch and about an hour to wire it. (lot's of plastic to remove and reinstall) Thanks again guys......Happy Customer.

- 119178KIT

I ordered a hitch and light kit both were well pack and arrived in a week with free shipping.

- 119178KIT

It's still sitting in its box. Other tasks have higher priority. Sorry.

- 119178KIT

Easy install and doing its job nicely.

- 119178KIT

always great products and service.

- 119178KIT
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

- 119178KIT
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.

- 119178KIT

Everything was perfect from start to finish. Received delivery promptly and installation completed in an hour and a half including wiring. Only things I recommend is installation instructions for wiring kit and better quality scotch lock connectors. I am an ASE Master Technician with 40 years experience so installing the wiring w/o instructions is not an issue. Others may benefit from an instruction sheet. Overall 5 star experience.

Show More Reviews

Ask the Experts 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...
  • 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...
  • 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...
  • No Turn Signals on a Trailer with New Lights being Towed with a 1997 Toyota Corolla
    It sounds like you are saying that your Toyota Corolla has working turn signals but that the trailer connector on the vehicle does not have the turn signal functions. This is most likely because the trailer wiring on your car does not have a converter installed that will combine the turn signals with the brake light signal for towing a trailer with a US standard two wire system. The correct wiring harness for your 1997 Toyota Corolla is the Taillight Converter Hardwire Kit, # 119178KIT....
    view full answer...
  • How To Install Draw-Tite Wiring Harness # 119178KIT to 1997 Volkswagen Jetta
    I do not have a wiring color reference for your 1997 Volkswagen Jetta, but if you are using the Tow-Ready Wiring Harness, part # 119178KIT, I can tell you how to connect the harness. Vehicle specific installation instructions are not available due to the fact that this harness fits many vehicles. But there are general instructions which I will outline below. I am also including a link to the installation instructions of the wiring harness. There are 5 wires that will need to be wired to...
    view full answer...
  • Trailer Wiring Recommendation for a 2001 Toyota Corolla
    Yes, the Tow Ready Custom Fit Vehicle Wiring # 119178KIT that you referenced is recommended for your 2001 Toyota Corolla. I wish I had specific installation instructions that would apply to your 2001 Toyota Corolla, but we have not had a chance to install this product in a Corolla like yours yet. Basically you will need to access your tail light wiring, test for function with the included circuit tester and then wire up the unit according to the installation instructions that I attached...
    view full answer...
  • How to Install Tow Ready Custom Fit Taillight Converter # 119178KIT in 2011 Hyundai Accent Hatchback
    The Tow Ready Custom Fit Taillight Converter # 119178KIT installs in your 2011 Hyundai Accent Hatchback by connecting to the wiring at the tail light assemblies. This harness works with both LED and incandescent lights and has an auto-reset feature. The kit includes the harness with 4-pole connector, a circuit tester to confirm the function carried on each vehicle wire, and quick-splice connectors. I have attached the written installation instructions as well as a sample video showing...
    view full answer...
  • Troubleshooting Left and Right Blinkers that Blink Together
    What's happening is that your left/stop turn circuit is shorting out to your right stop/turn circuit and when one circuit is getting activated the other is as well due to the short. The best way to fix this would be go over all of the connections you made looking for any exposed wire and fix as necessary. I attached an FAQ on troubleshooting 4-way installs for you to check out as well.
    view full answer...
  • Tips for Installing Trailer Wiring Harness 119178 On a 2000 Toyota Corolla
    Since trailer wiring harness # 119178KIT is a universal fit type of item it does not have vehicle specific instructions. So the instructions are basically the same for all vehicles. You will use the included tester to test the tail light wiring on the vehicle then make the necessary connections. White is ground and connects to a bare metal surface. Red is brake lights only, yellow is left turn signal only, and brown is running lights only. These are all on the driver's side. The green...
    view full answer...
  • Installation Instructions for the Tow Ready Wiring Harness part # 119178KIT
    I attached a link to the right that has the installation instructions for the Tow Ready Wiring Harness part # 119178KIT you referenced. I also attached an install video that shows this harness being installed on a similar Saturn as yours. Your local hardware store should be able to set you up with a self-tapping screw to use for the ground wire as well.
    view full answer...
  • Trailer Wiring Harness Recommendation for a 2016 Mazda CX-5
    The recommended trailer wiring harness we carry for your 2016 Mazda CX-5 is the Tow Ready wiring harness part # 119178KIT. This kit is compatible with LED or incandescent bulbs so it would work well.
    view full answer...
  • 4-Pole Wiring Harness for 2002 Damon DayBreak
    For a 4-pole flat wiring harness for your 2002 Damon DayBreak built on a Chevrolet Workhorse chassis, you can use Tow Ready Kit # 119178KIT. This kit includes the powered converter, a circuit tester to help you identify the wires for connection and the quick-splice fasteners. This harness will combine the separate stop and turn functions on the 4-pole output side. These combined signals will be carried on the green and yellow wires, right and left respectively.
    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 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...
  • 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...
  • Is Upgraded Circuit Protected Tail Light Converter Hardwire Kit # 119178KIT Weatherproof
    The converter box of the # 119178KIT is totally sealed. It would not have any issues out in the weather installed on your trailer. I wouldn't recommend submerging it in water at any point but it would be perfectly weather resistant for your application.
    view full answer...
  • Trailer Wiring Recommendation for 1989 Geo Tracker
    For trailer wiring for your 1989 Geo Tracker we have universal kits like the part # 119178KIT which are a confirmed fit. This brand is the most reliable of the options available for your vehicle though.
    view full answer...
  • Wire Gauge Used in Tekonsha 4-Pole Trailer Wiring Harness 119178KIT
    The Tekonsha 4-pole trailer wiring harness # 119178KIT is a confirmed fit for your 1989 VW Vanagon and it uses 16-gauge pigtail leads to connect to the wiring in your vehicle. The kit includes the required quick-splice connectors and a circuit tester.
    view full answer...
  • Solution for Trailer Wiring Circuits Not Active on 2004 Dodge Ram
    On a 2004 Dodge Ram the trailer wiring circuits are protected by the TIPM of the vehicle which can only be reset by a Dodge dealer. Problem is that it can only be reset so many times and after that requires an expensive replacement. That's why we recommend bypassing it with a hardwired trailer wiring harness like part # 119178KIT. Which you can then wire to the 7-way of the truck.
    view full answer...
  • Recommended Trailer Wiring Harness for 2008 Toyota Yaris Hatchback
    I do have a solution for you, however there is not a wiring harness currently available for your 2008 Toyota Yaris that will plug in without splicing into the vehicle wiring. I recommend the Tekonsha Upgraded Circuit Protected Tail Light Converter Hardwire Kit # 119178KIT. This kit will include everything you need to install a 4-Way connector on the vehicle that will power a trailer's signal lights. A circuit tester is even included to assist with locating the correct wires to splice...
    view full answer...
  • Recommended Trailer Wiring Harness for 2004 Audi A6
    For your 2004 Audi A6, I recommend the Tekonsha Upgraded Circuit Protected Tail Light Converter Hardwire Kit with 4-Pole Connector (Includes Tester) # 119178KIT. This wiring harness will convert your trailer lights to function correctly with the running light wire (brown) and the brake/turn signal (green for right/yellow for left) and of course your ground wire (white). I've attached an article to assist in routing that 12V power wire.
    view full answer...
  • Where Does Red Wire of Trailer Wiring Kit # 119178KIT Wire to on Vehicle
    When installing the trailer wiring harness part # 119178KIT that you have the red wire gets ran to the stoplight circuit. If your vehicle has taillights that only come on with the brakes (and not with the blinkers), that is the circuit this should run to. Another place you can find this circuit is the third brake light of the vehicle.
    view full answer...
  • Installing the Tekonsha Kit # 119178KIT on a 2007 Audi A6
    To install the Upgraded Circuit Protected Tail Light Converter Hardwire Kit # 119178KIT correctly to your 2007 Audi A6 you will simply need to use the included circuit tester to see which light functions you need to splice into. Since vehicle manufacturers are not always consistent with their wiring and since there is no standard for color wires to use this is the best method for installation. You will want to connect the following wires from the kit to the following functions on your...
    view full answer...
    Image 1 for
  • 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...

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