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Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector

Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector

Item # 119178
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119178 - 4 Flat Tekonsha Wiring
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In Use/Installed

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 wiring from Tekonsha. Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector part number 119178 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (27)
  • Q & A (57)
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  • Why etrailer?

Tekonsha Wiring - 119178

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

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


Features:

  • 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 most multiplex wiring systems


Specs:

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


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.


Warning: 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.



119178 Circuit Protected Taillight Converter with 4-Flat End

Replaces 119175

Installation Details 119178 Installation instructions




Customer Reviews

Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector - 119178

Average Customer Rating:  4.9 out of 5 stars   (27 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).

- 119178
by:

The product worked exactly as described for my 2003 Dodge 2500. No complaints 825361



- 119178
by:

the Tekonsha trailer light module solved the problem of no stop light power to the trailer I was working on. Amy was very helpful and pleasant to work with. I tell everyone if you need anything for trailers just call E Trailer. Joe 809401



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Good product, best price, prompt shippi ng. 660827



- 119178
by:

Got the 5 to 4 wire converter for my 2015 Goldwing aand installed it recently. Excellent product with well marked wires. Unit was well sealed from the weather and is working great! Fast shipping too! Highly recommend etrailer.com 649529


Comments
Still working perfectly!
Donald A - 05/31/2020

78111

- 119178
by:

Works as it is supposed to and stores out of the elements. 586152



- 119178
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works great 584662



- 119178
by:

worked great, easy to install, great support from james and the crew! 574404



- 119178
by:

Went though multiple adapters from different manufactures for 2000 Toyota tundra in less than a year, installed this unit and it's still working, it is a little more involved but able to locate the main body where road spray won't kill it. 571103


Comments
Still working in Minnesota.
Jim - 10/03/2019

62651

- 119178
by:

We ordered lights and an electrical hookup for a 1965 Starcraft Tent Trailer! It came correct and very quick. like four days! Easy and fast! 556000



- 119178
by:

Everything worked as expected. 1 year in and no issues. Great product. 514195



- 119178
by:

This converter was exactly what I needed for my Honda trike and I received it in just 2 or 3 days very pleased 463926



- 119178
by:

It took me a lot of time trying to figure out what I needed to adapt a 6 Pin round to a 4 Pin flat on a 2008 Winnebago View with always on daytime running lights. Brake lights wouldn't illuminate, turn signals worked fine, and DRLs were always on the towed vehicle as well as the View. Normal plug-in adapters won't work and there was no way without an expensive Dealer reprogramming to disable the DRLs. This baby did the trick, once the brake controller wire was identified it was a simple matter of splicing. 420280



- 119178
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ok 413014



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by:

Bill E. was extremely helpful answering my questions and ordering a replacement part that was no longer available from Valley after a wiring converter failed. Have not had time to install new part but expect no problems. Received order promptly as well. 345507


Comments
Worked great, just what I needed. Very happy with no problems.
Robert P - 02/26/2018

35190

- 119178
by:

This unit worked well with my 2013 Volkswagen Jetta Sportwagen TDI. The only thing I had to do to make it work better was to run two relays, one for the running lights and one for the brake lights. Other than that issue, It's an easy to install and easy to wire type of deal. Still functioning perfectly a whole year later! 322263



- 119178
by:

Easy to install and no separate power required. Some of the other taillight converters require a dedicated 12V power source, which means routing power from the battery...not this unit! The unit is easy to install, but it doesn't come with the quick splice connectors, so order those as well if you don't want to solder and heat shrink. I installed this on a 2006 WRX which required partially removing some trunk carpet and 1 piece of trim (4 carpet fasteners and 2 plastic nuts). The demo video on etrailer.com for the 2007 WRX correctly identifies the wire colours (I checked). I have a 3rd brake light on my trailer, so I ran an additional brake light wire to the 5 pole plug I installed in place of the flat 4 connector that comes with this kit. If you aren't worried about scuffing the bumper with the wire hanging out the trunk, the flat 4 will work fine. I drilled a hole in the back panel of the trunk and routed the wires through a grommet and down to a PK11502 Pollak 5 pole socket plug. 281221



- 119178
by:

Product was just fine but etrailer takes service and training to the next level. Great how-to videos, schematics and diagrams make it very clear on how to install. Thanks! 179080



- 119178
by:

Thank you so much for your promptness and complete answer to my initial inquiry and providing a product that worked. The one my mechanic had installed did not work. 137142



- 119178
by:

Just what was needed. Excellent quality. Did not expect the electronics to be sealed as well. 123134



- 119178
by:

I installed this on a 2008 Honda Goldwing. It was an easy install and works as advertised. Great service from e-trailer. 65611



- 119178
by:

Excellent product, first class service as is the norm from etrailer. 56428



- 119178
by:

Easy install (though haven't gotten the trailer to give it a try yet). Seems to be of good quality. 46885



- 119178
by:

The staff at etrailer.com had my order filled and at my doorstep in 3 days. Amazing service and one stop shopping for high quality parts. I added them to my favorites list. 34249



- 119178
by:

Ordered and delivered in less than 24 hours with free shipping! Thanks Etrailer. Gary G 25773



- 119178
by:

Easily installed and works perfectly on a 2007 VW Touareg. No "fault" signals of any kind. 19517


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Show More Reviews

Ask the Experts about this Tekonsha Wiring

  • Parts Needed to Install a Brake Controller and Fully Functioning 7-Way on a Semi
    Installing the Tekonsha Upgraded Circuit Protected Tail Light Converter with 4-Way Flat # 119178 and the Hopkins Adapter # 37185 will give you your basic trailer light functions. If you are wanting to have a fully functioning 7-Way then you want to install the part # 119178 and the Universal Wiring Kit # ETBC7 which includes the Hopkins Adapter # 37185 as well as wiring, connectors, and other parts needed for the installation. I have linked a helpful article that you can reference for...
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  • Installing Tekonsha Prodigy RF on 2001 Fleetwood Bounder Motorhome
    You would begin by installing a 7-way connector at the rear of the coach. How this is done will depend on whether you already have a functional 4-pole connector. If you do, you can simply use an adapter like part # 37185. The adapter would plug into your existing 4-pole, with the white wire grounded to the frame and the black wire extended with a length of 10 gauge wire like part # 10-1-1 and ran to the positive battery terminal via a 40 amp inline circuit breaker like part # 9510. The...
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  • How to Install a Brake Controller on a Motorhome with 2000 Ford E-450 Chassis
    In order to install a brake controller like the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 on your motorhome with a Ford E-450 chassis you are first going to need a 4-way trailer connector if you do not already have one. For this, I recommend the Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector part # 119178 which will provide you with a 4-way trailer wiring harness that can then be used to adapt to a 7-way trailer wiring harness with the...
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  • Wiring Harness Recommendation For A 2004 Ford Escape
    The Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector part # 119178 is not ran directly to the vehicle's battery. There are 5 wires that you will need to connect in order to install this harness. The white wire is for the ground circuit. The brown wire is for the tail lights. The yellow wire is responsible for the left turn signal. The red wire is responsible for the stop lights and the green wire is for the right turn signal. You will attach each of these...
    view full answer...
  • Replacing Existing 7-way Trailer Connector on Motorhome on Ford E450 Chassis
    Depending on the 7-way connector you presently have, we might have a very easy solution for you. Take a look at your existing 7-way, and see if it's possible to unplug the factory harness from the back of the connector. There will be a gray locking tab that needs to be slid toward the front of the vehicle before the connector can be unplugged. If it's possible to unplug the harness, the Tekonsha # 74682 would be a perfect plug and play replacement. If you cannot unplug the connector...
    view full answer...
  • Trailer Wiring Installation on 1999 Ford E450 Van
    If you're speaking of the video showing the # 119178 being installed on a 1999 Ford Van (see link), the harness is wired into the vehicle side of the van, closer to the front of the vehicle. The vehicle being wired in the video had a 'separate' taillight system, meaning that the turn signal and brake lamp are combined on the same circuit. You can quickly tell if your vehicle has this type of system by looking at the taillights. If the turn signals use a separate amber bulb or there's an...
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  • Tow Ready Trailer Wiring Recommendation for a 2003 Chevy Venture
    For your 2003 Chevy Venture it is recommended that you use a Tow Ready Custom Fit Vehicle Wiring # 118355. This unit will not require any wire cutting or splicing to install on your vehicle. It will be a simple plug and play installation. I attached installation instructions and an installation video of this product for you to check out also. The Tow Ready Wiring Harness # 119178 that you referenced could be used on your vehicle but it would require you hard-wiring the unit into the...
    view full answer...
  • Trailer Wiring Harness for a 1993 Toyota Pickup Truck
    For a 1993 Toyota Pickup, the correct trailer wiring harness is # 118379. I have included a link to the installation instructions and a link to a video showing a typical installation. If you have a 1993 Toyota T100, you would need # 118496. I have included a link to the installation details for this harness as well.
    view full answer...
  • Parts Needed to Install 7-Way on 2008 Volvo VNL 670 for Towing Fifth Wheel Trailer
    Your fifth wheel trailer is going to have a 7-way blade style trailer wiring connector, so while the part # 119178 is the correct harness to start with you'd need to convert it to a 7-way with the adapter part # 37185. This will allow you to convert the taillight signals to a 7-way which will be easily controlled by the 2008 Volvo VNL 670.
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  • Converting a 5 Pin Trailer Connector on a Motorcycle To a 4-way Flat on Trailer
    I have a solution for you, however we do not currently carry a vehicle 5-way to a trailer 4-way adapter. In order to connect your motorcycle to your trailer, you will want to create an adapter. To provide your trailer with a 4-way flat connector, you will want to use the Tow Ready Upgraded Circuit Protected Taillight Converter # 119178. The wires that come out of the harness's converter will be connected to a 5-way trailer connector. If the 5 pin on your motorcycle is round, you...
    view full answer...
  • Will Upgraded Circuit Protected Converter Part Work With Trailers with LED Lights
    The portion of the product description you are referring to states that the trailer converter and wiring, part # 119178, should not be used with vehicles that are equipped with LED lights. Trailers equipped with LED lights are fine. Part # 119178 is fine for both your Altima and Versa as long as they are not equipped with LED tail lights and blinkers. The reason why it should not used with LED vehicle lights is because LEDs use much less current than incandescent bulbs. LEDs are new...
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  • Wiring Harness for a 2007 Mitsubishi Endeavor
    Since 07 Endeavors did not come with a tow package, you will need to hardwire your vehicle. The wiring system on this vehicle is not strong enough to support both the vehicle and trailer lights, so a powered converter or Modulite is required. Powered converters (Modulites) are spliced into the vehicle wiring system to get the signal, but the power for the trailer lights is drawn directly from the vehicle battery unlike non-powered systems. This bypasses all the expensive electrical...
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  • Wiring Harness Compatibility With 2003 Honda Civic
    The Tekonsha Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector # 119178 does not require a power wire. It captures the functions without needing direct power to the module from the battery. The module has an integrated short circuit protection to prevent overload. This harness is a confirmed fit for both the Coupe and the Hatchback model.
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  • Trailer Wiring Harness for 2014 BMW 328D
    Your 2014 BMW 328D features a combined multiplexed wiring system and a powered module is needed on a trailer harness to accurately read its voltage levels and properly power the trailer lights. The Tekonsha Harness # 119178 that you referenced does feature a converter/module like you mentioned but it's not powered. For your BMW you will instead need the Tekonsha Wiring Harness # 119190KIT, which includes the powered converter and the necessary wiring and connectors to run it to the...
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  • Recommended 6-Way to 4-Flat Adapter for Towing Trailer Behind Itasca Motorhome
    In order to take the separate brake lights and turn signals from your Itasca Motorhome and convert them to the combined circuits for your trailer, I recommend using the Tekonsha Upgraded Circuit Protected Tail Light Converter # 119178. This will be powered by the battery and will install before the 6-Way trailer connection. You can then simply use a 6 Pole to 4 Pole adapter like the Pollak # PK12717 to connect with the trailer. I have included an image that shows the wiring locations...
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  • 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)...
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  • What Gauge Wires is the # 119178 Tow Ready Circuit Protected Converter Constructed With
    The wire gauges on the Tow Ready Circuit Protected Converter, item # 119178, are 16 gauge.
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  • How to Wire a 2006 Harley Ultra Electra Glide for a 5-Wire Trailer and Isolate the Trailer Lights
    We have run into this scenario a few times. There is a solution and it is fairly simple, but it will take some patience and some wiring skills. It is easy to go from 4 to 5, and from 5 to 4, but when you go 5 to 5 but add an isolator is when it takes more time. An isolator, or Powered ModuLite/Converter, does as you say. It isolates the trailer lights so that if something were to happen to the trailer, it would not damage the lights or wiring on the motorcycle. This is the right way...
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  • 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.
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  • Vehicle Wires are Thinner than the Wires of the Circuit Protected Taillight Converter
    It is not uncommon for the wires on your vehicle to be a little bit thinner than the wires of the Circuit Protected Taillight Converter with 4-Pole End, part # 119178. As long as you are tapping into the correct turn signals and brake and running lights, you should not have any problems. The circuit protected converter will protect your vehicles sensitive wiring and circuitry.
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  • Wiring Kit Recommendation for a 2012 Toyota Yaris Liftback
    I checked with Tow Ready and the Tow Ready Custom Fit Vehicle Wiring # 119178KIT that you referenced will work on your 2012 Toyota Yaris with a liftback. I attached installation instructions for this wiring kit for you to check out also.
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  • Wiring a New Truck Bed with 2-Wire Wiring to a 2004 Dodge with Separate Brake/Turn Signal Wiring
    You will need a converter to make the separate brake and turn signals and brake lights work with the combined turn signals and brake lights on your new truck bed. You could use the Roadmaster Brite-Lite Wiring Converter, item # RM-732, which is designed for 3 wire motor homes down to 2 wire towed vehicles. I would use the Upgraded Circuit Protected Taillight Converter with 4 Pole End, item # 119178, and cut the 4-Way connector off of one end. This will be a more economical solution with...
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  • What Wiring Should I use to Connect a 2007 Toyota Tacoma with a Trailer
    The proper harness for a 2007 Toyota Tacoma is part # 118496. It is a T-One harness that will simply connect to the connectors behind the tail light. You will not have to do any splicing. Attach the ground and then it is plug-and-play. I have added a link to the part below, and a video showing the installation on a 2007 Toyota Tacoma .
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  • Towing a Trailer with Electric Brakes with a Semi Tractor with Air Brakes
    To tow your trailer that uses an RV style 7-way blade style connector with your semi that has a 7-pin connector, you need to construct an adapter that will also combine the brake signal into the right and left directional signal pins. This can be done by using a female 7-pin socket # PK11720 to accept the plug from the semi, a tail light converter # 119178 and a female 7-way RV blade-style socket # PK12-707E. The converter would be wired in between both sockets to combine the brake...
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  • How To Wire A 1998 Allegro Motorhome And Tow Dolly For A Brake Controller
    The brake controller I would recommend for your 1998 Allegro motor home is the Tekonsha Prodigy P2 Proportional Brake Controller, part # 90885. The Prodigy 2 brake controller is our best selling model. It can be mounted in a 360 degree vertical range and will level itself automatically. It is a proportional brake controller which means that the brakes are applied to the tow dolly at the same time and same strength as the brakes on your vehicle. I am including a link to the installation...
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  • Recommended Converter For Winnebago To Combine Turn And Stop Signals For Trailer Connection
    To take separate turn signal and brake signals from your motorhome and convert them to combined for your trailer connection, I recommend the Upgraded Circuit protected converter that is powered by the battery # 119178. This will need to be installed before your 6-way trailer connection and will allow you to simply use an adapter like # PK12717. I've attached a photo to help you with wiring locations on your 6-way trailer connector.
    view full answer...
  • Converting a 5-Way Trailer Connector on a Honda Goldwing to a Standard 4-Way Flat
    Since motorcycles have separate turn signals and brake lights they will only work with a trailer that either also has a separate system or would require a converter to make the trailer and bike compatible. Right now, the separate brake light circuit has no where to go on the trailer. It would be easiest to convert the connector on the bike using converter # 119178. On this converter, the red input wire is for brake lights only from the bike, green is right turn signal only from the...
    view full answer...
  • How to Install a 7-Way on a 2018 Ram 1500 Without Tow Package
    The first thing you are going to want to do is check under the rear bumper near the spare tire for a wiring plug called a US Car Connector which you can see a photo of attached for you. If you have this plug then all you will need to install both 4 and 7-way trailer connection points on your Ram is the Curt T-Connector Vehicle Wiring Harness part # C55774. If you do not have this wiring plug then you will need to hardwire both wiring harnesses into the vehicle's tail lights. In order...
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  • Trailer Wiring Recommendation for a 2015 Kia Soul Towing a Motorycle Trailer
    For your 2015 Kia Soul you would want the part # C56222 if your vehicle does not have LED taillights or part # C56220 if you do have LEDs. Now to connect to the wiring on your trailer you will first need to make an adapter. There are two good ways to accomplish this. You can convert the motorcycle trailer and the motorcycle to a combined system that uses the same light for the brake light and turn signals. The rear lamp assemblies would need to be replaced, and put a converter like...
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  • Is there an Adapter to Go From Semi Style 7-Way to RV Style 7-Way Trailer Connector
    Because the functions on a semi 7-Way connector are different than those in the RV industry a regular adapter would not work. Some of the circuits have to be combined so a converter is needed. It would actually be easier to just add an RV style 7-Way on the semi rather than making an adapter as described in the question you referenced. If your semi has combined brake lights and turn signals on the same circuits then you would just need a vehicle side 7-Way such as # 50-87-009 and wire...
    view full answer...




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Info for this part was:

Installed by:
Joe V
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
John H
Video Edited:
Joshua S
Updated by:
Adele M
Updated by:
Sarah W
Updated by:
Isabelle B
Test Fit:
Shane T
Video by:
Chris R

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