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Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit

Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit

Item # 119190KIT
Our Price: $122.44
Trailer Wiring
This item qualifies for Free Shipping
Shipping Weight: 1.85 lbs
Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit Vehicle End Connector 119190KIT
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Tekonsha trailer wiring for your 2019 Chrysler Pacifica are available from Installation instructions and reviews for your Chrysler trailer wiring. Expert service, and great trailer wiring prices. carries a complete line of Tekonsha products. Order your Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit part number 119190KIT online at or call 1-800-940-8924 for expert service.
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Tekonsha Trailer Wiring - 119190KIT

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • Tekonsha

This ModuLite harness offers peace of mind by including circuit protection to safeguard itself and the tow vehicle from harmful electrical shorts and mis-wire situations. The upgrade also includes the ability to work with PWM on vehicles.


  • Short circuit protection safeguards itself and the tow vehicle against harmful electrical shorts and mis-wire situations
    • Automatically self-resets
  • Virtually eliminates draw on the vehicle's tail light circuit
  • Tail light circuit has been upgraded to work with vehicles using Pulse Width Modulation (PWM), allowing converter to fully turn on, giving trailer lights full brightness during activation
  • Powers the trailer's stop, turn, tail and running lights directly from the tow vehicle's battery
  • Unit prevents feedback from trailer to vehicle system
  • May be used on 2- and 3-wire systems
    • When used on 2-wire systems, brake wire on harness must be grounded
    • Adapts a 3-wire system on the towing vehicle to work with a 2-wire system on the trailer
  • Will work on vehicles and trailers with either LED, incandescent, or standard bulb tail lights
  • Works with most multiplex wiring systems
  • Install kit (118151) is included to help run wire to vehicle battery

Warning: Overloading circuits can cause fires. Do not exceed:

  • Maximum stop/turn light: 4.2 amps per circuit
  • Maximum tail lights: 7.5 amps

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

119190KIT Upgraded Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness with Install Kit

Installation Details 119190KIT Installation instructions

Customer Satisfaction Score:

Customer Reviews

Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit - 119190KIT

Average Customer Rating:  4.6 out of 5 stars   (414 Customer Reviews)

This ModuLite harness offers peace of mind by including circuit protection to safeguard itself and the tow vehicle from harmful electrical shorts and mis-wire situations. The upgrade also includes the ability to work with PWM on vehicles.


There is no where at attach the wire harness it just dangles

The protective cover on the trailer connector can be attached to the safety loop as shown in the thumbnail photos above. This will keep the connector secure until its needed.
-- Etrailer Expert Mike L - 09/15/2022


The only reason I am not giving this 5 starts is the power wire that runs to the battery was 1 foot too short and I had to buy more wire to extend it. Otherwise very good it and functions properly. I did not use the quick connectors and decided I wanted a more secure long-lasting connection then crimping onto vital brake light wires.


Install on 2018 Mercedes Benz CLA250 w/LED tail lights:

There were no guides I could find so I'm posting this for other etrailer customers.
These are my installation notes and the kit operates correctly. There are other ways to do this, I'm sure.

It isn't necessary to remove the tail lights, there is a removable piece in the trunk carpet. I removed that and the plastic trim panel in the middle.

The tail lights have 10-pin connectors. On the left there are 8 wires on the right there are 7. My thought is maybe this has something to do with the european style parking lights. After probing I found this:

Left Side:
Turn/Brake - Yellow with White stripe
Running/headlights - Black with Orange stripe
There is constant power to the Green with White stripe

Right Side:
Turn/Brake - Light Blue with Red
There is constant power to the Green with White stripe

I had to splice additional wire to mount the module where I wanted it. The final connections were:
Module Brown to Left Black/Orange
Module Yellow to Left Yellow/White
Module Green to Right Light Blue/Red
Module White to Ground
Module Black to Battery
Module Red Terminated (unused)

The positive electrical connection I made was under the hood, off the fuse box. Terminated to one of the lugs, covered with wire loom, and run into one of the cars wire bunches.

The 4-wire hitch output is terminated with a CURT tester (If you put one there, you'll always know where it is when you need to troubleshoot something)

This vehicle is completely covered on the bottom and running the wire can be very time consuming if you want it to look tidy.


This kit was great and functions exactly as intended. With the help of the online video it was easy to install, even for people without any electrical knowledge.

My only advice is:
1) watch the video and the hitch installation video at the same time. This will help you plan ahead and not re-install parts during the hitch installation, that will need to be removed for the harness installation
2) be VERY careful about selecting the right wires, by using the testing tool eTrailer provides. In the install video for my BMW X5, the technician referenced a yellow and black wire when making the initial connection. He later goes on to make a separate connection for a black and yellow wire. To the novice they look nearly identical. I confused the two wires and had to re-do this, but would not have been an issue if I had understood the distinction and used the testing tool, as recommended in the instructions
3) be careful about placing all connectors so that they face in the same direction. Does not impact function, but makes for a neater install when complete.

I could not be happier about how this project turned out, and credit etrailer with all of the success. It has a very OEM look, and etrailer made the entire project doable for me through their great suite of videos and excellent Customer service. I wish every retailer could be this good!


Everything you need to perform the wiring installation like a pro. I also purchased the circuit tester which I highly recommend. Brophy Circuit Tester for 4-Pole Flat Trailer Connector item #F4CT


The quality is great and the install videos are awesome thanks!

Alan - 10/16/2022


This is a great wiring harness. It took me a bit of time to sort out the correct wiring on my 2013 Tesla Model S, though, as the instructional video on ETrailer's site was specific to a different model year that had different wiring in the taillight harnesses.


It took some time and trouble to figure out how this correlates to the installation video (for the Curt model, which has fewer wires). Once the right wires were identified, it was very simple and straightforward. The system works like a charm, and I've already towed a U-Haul trailer. Depending on the vehicle, I would recommend getting some 3/8" wire loom ($1.99 @ Home Depot) to protect the power wire from abrasion/cuts if you route it along your car's underbody. The included instructions (online & paper) are too generic to be useful, and the vehicle wiring codes (types of wire systems: 2-wire, 3-wire pulse, etc.) don't have a reference on the TowReady website. Moderate gripes, but some streamlining would've saved me unnecessary troubleshooting. All the parts you need are included, with extras just in case.

Hey Jameel, not sure if things were different back in 2012 but for folks ready your review today, I suggestion 1/4 wire loom instead. The 3/8 diameter is larger than needed and leaves more play.
-- comment by: Richard - 06/02/2014


Great product: installed on my 2013 Mini Cooper Hardtop quite easily. I had called Trailercraft to install & was told there wasn't a hitch made for my Mini, & if there was one they would charge $1,000 to install it. DYI video was easy to follow.


The product works great. The worst thing about it was that there were no instructions with it at all. I had to email etrailer and they in turn emailed me the instructions. Other that that no problems. Fast shipping and product is as advertised.

I used this product on my Victory Vision so that I could pull my trailer. Below is a picture of where I placed it. It worked out best in my opinion to velcro it to the back of the saddle bag. It actually mounted right under the wiring harness of the bike that I had to tie into.

Still works great. No problems at all.
Damon C - 12/18/2014


The link for the You Tube video was something I found. It would have been better to have a link sent with the order for the vehicle model and year specified. I was ready to send it back,, but then I found the video by doing a Google search.

The splice connectors are very finicky. One must be sure to have the small wire positioned very carefully so that the clip catches it and does not push it to the outside of the clip.


I installed my unit on a 2013 Audi a4 quattro sedan. using the provided tester I determined it is a two wire system. i installed unit in driver side outside of trunk. I easily snaked the green wire through trunk to passenger side chamber. The battery is in the trunk, so it was easy to connect supplied fuse connector directly to battery. Wiring:
Unit green wire to gray/blue wire on passenger side
Unit Yellow wire to gray/white wire on drivers side
Unit Brown to Green wire on drivers side. No drilling needed
Ran trailer wire into trunk and out through cut out on trim where hitch is
Works perfectly.
Reason for not a 5: No directions and missing 1 crimp connector.

Thanks for your business and your detailed review regarding the wiring, Frank. Depending upon the factory product run, the vehicle wiring colors may change. We always recommend testing for function before connecting the wires.
-- Etrailer Expert Laura E - 03/15/2017


thanks for being so helpful in switching us into this heavy duty wiring harness. The service was better than all face to face places in this type of business. My installer swapped out the modules and everything worked perfectly. I can't say enough about both customer service and the tech support that we received. There should really be a sixth star (for above and beyond)!

Works great... thanks.
Doug L - 01/16/2018


Perfect ! First time I install a hitch and this kind of electric Harness. I was a little confuse on what to do first but well explain and it went very well.
Tips : On my Tesla model 3 2020 there was a 12v plug already coming directly from the 12v battery in front, so it was a lot easier then passing this cable my self. The cable is in the bumper, you should see it if you install the hitch :-)
I own a company and I work with computer, so nothing to do with mechanics and electronics. Just study the plan, watch videos online. Once you understand exactly how it works, it's pretty easy to install.


Thank you E-trailer for my heavy duty Modulite wiring harness with installation kit. Looking forward to using this high quality product.


I am pleased with my experience with ordering and installing this wiring kit. Prompt delivery, good updates on shipment progress, quality product, great instructions. Where the individual vehicle owner is either familiar with basic electrical installations or willing to learn, I feel the installation is not difficult.


wiring harness,2 shops refused to insta ll.


The kit was fine. It was missing a couple of ring connectors and test light will require some additional wire to use it. The video on your site was very helpful. One more suggestion would be to use electrical tape instead of the zip ties where the wiring must be routed next to the hatch hinge. if there is tension the zip ties might break, but the tape will flex a bit.

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 01/17/2022


A module such as this is absolutely essential when trying to add a trailer lighting circuit to a modern CANbus equipped vehicle. The module itself works beautifully but I deviated from the eTrailer install video for my '13 Jetta Wagon.

First, I used the 'poke-n-wrap' method with solder to attach the module's signaling wires to the vehicle wiring harness. I have a personal aversion to Scotchlok or vamp connections because they often fail with time and vibration. This method keeps the harness relatively compact and clean looking, especially if you resecure everything with cloth wiring harness tape.

Second, no self drilling screws. I attached the module to the chassis with proper self adhesive tape like 3M VHB. The white ground wire is easily attached to the existing grounding lug on the left rear wheel well, so no self drilling screw there either. Don't poke holes in your chassis with self drilling screws if you can avoid it.

I avoided drilling a hole in the spare tire well by running the power wire through the existing body plug in the area aft of the right rear wheel well. It's easy to remove the plug, drill a hole in it, and thread the wire through. Add a dab of black RTV to make sure it's watertight.

When powering the module, the suggested method is to split the 1/4" ring terminal and stuff it under the nut that holds the positive battery terminal in place. Instead, I obtained an M6x1.25 nut and secured the fuse holder to a unused, unfused stud on the terminal block inside the underhood fuse block. When it's time to change the car's battery, the split ring will inevitably get deformed and may cause problems. This way, the positive terminal clamp only has to do one thing: hold onto the positive terminal.

To bring the wiring harness outside the wagon I went a little off the deep end with a little sheet metal work and Molex MX150 connectors to make the passthrough watertight. I added etrailer 18140 and 18144 to mount the 4-way connector to the hitch so I wouldn't have to fish the wire out of the left-side trunk compartment and shut the tailgate on it every time I wanted to tow.


The kit had everything needed to do the job. It was installed on a BMW X3 and went together easily as the components were high quality. It did not upset the BMW sensing systems for anomalies which was great.


The harness works perfectly with my 2015 Honda Fit and installation was pretty solid, especially now since Honda makes interior clips easy to remove.

I had trouble with the wiring at first due to having the 3 wire system, but after giving etrailer a call during the install I was walked through which colors go where (I was watching the 2014 VW Passat video where they say to make the red wire the extra ground, don't do it with the Fit! It's the brake light FYI).

No instructions included, just check out the sample videos on this page for the install on other similar vehicles.

We purchased the custom Drawtite hitch and wiring harness to help pull along our hot dog stand (Gnar Dog's Hot Dog Stand) in the greater Cincinnati Area. Couldn't be in business without etrailer; thanks guys!


Fast delivery, products received in perfect condition. Fits like a glove and very helpful installation videos available. Only issue, 1 power wire connector missing in the kit, not a big deal.

I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 02/20/2022


Worked out great on my Volkswagen, installed easily and I've had no issues with it.


I ordered a hitch and a modulite controller. Upon arrival the box was mangled and only the hitch was inside, I reached out on a holiday and they were prompt to respond and send me a new one. I haven't installed it yet but as a company review worth the 5 stars. I'll try and revise review once installed and has been on for a while.


Would have been 5 stars if it had included a schematic of color coded vehicle wiring.

Show More Reviews

See what our Experts say about this Tekonsha Trailer Wiring

  • Can Power Wire for Trailer Wiring Harness be Connected to 12 Volt Outlet on 2013 Volkswagen Tiguan
    No. The issue is that wiring harnesses # 119190 or # 119190KIT are tested and rated for a connection to the battery only. Installing them using any other method could cause undesired operation. Also, if connected to a 12 volt outlet, you will lose that level of circuit protection between your 2013 Volkswagen Tiguan and the trailer. Routing the wire is just time-consuming but not really difficult. I have included a link to a help article with tips on routing the power wire for you.
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  • Installing Trailer Wiring Harness Part #119190 on a 2013 VW Tiguan
    Some vehicles combine stop and tail light functions onto 1 circuit and then also have an additional tail light function wire that is independent of the stop (such as your 2013 VW Tiguan). These vehicles will require that you attach the trailer light power module red “stop” wire to the same combined circuit on the vehicle and then attach the brown “tail light” circuit to the independent circuit on the vehicle.
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  • Trailer Wiring Harness for 1999 Lexus RX300
    PWM stands for Pulse Width Modulation, which is a particular wiring system that some vehicles use. Instead of having a single wire for each different circuit, PWM will use the same wire for two or more circuits by using varying pulses for different functions. PWM is a fairly recent technology, your RX300 uses a more traditional wiring system. The # 119190 converter you mentioned would work well for you, but I recommend the # 119190KIT that includes the wiring kit that includes the wire...
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  • Recommendation for a Trailer Wiring Harness for a Victory Vision Motorcycle
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  • Troubleshooting Wiring Issue On 1993 Jayco Eagle 10 Pop Up Trailer
    It sounds like you have a bad ground or you need a powered trailer harness. When you turn your headlights or running lights on, the power draw is too great to run the other trailer fuctions. This can be due to a bad ground, so I would check that first. You want to make sure you have a clean metal to metal connection on your trailer. The next thing is to check your trailer connection itself for corrosion and clean it as needed. Finally, if it is not a bad ground or corroded connection,...
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    There could be a couple of reasons for the lights dimming when the trailer is hooked up to the 2001 Ford Ranger. If the issues are truly caused by a lack of power coming from the Ford Ranger, installing an aftermarket powered wiring harness like the Tekonsha Upgraded Heavy Duty ModuLite Wiring Harness # 119190KIT may remedy this. I am unfamiliar with a signal booster like what you referred to in your question, but this harness should help with the power needed to activate the vehicle...
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  • Trailer Wiring Harness for Freightliner with Separate Turn Signals from Stoplights
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  • Installing the Tekonsha # 119190KIT Wiring Harness on a 2017 Mercedes-Benz GLC 300 4WD
    The tail light wiring on your 2017 Mercedes GLC 300 4WD is separate which means that it is a 3-wire system with the brake and turn signals being sent on different wires. For trailers they have the brake and turn signals run on the same wire. To properly install the Tekonsha # 119190KIT you will connect the following wires from the ModuLite to the following functions on your GLC 300: Yellow - Left Turn Green - Right Turn Brown - Tail/Running Lights Red - Brake Lights White - Ground If...
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    Image 1 for
  • How to Install the Tow Ready Wiring Kit part # 119190KIT in a 2014 BMW X3
    Yes, I attached a link to the installation instructions for the Wiring Kit part # 119190KIT. I also attached a link to a video that shows this product being installed on a very similar BMW X3 as yours. The written instructions will be somewhat generic, but the video will be much more specific to your vehicle.
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    For your 2015 Volkswagen Golf SportWagen, I recommend using the Tow Ready Upgraded Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness with Install Kit # 119190KIT. This kit virtually eliminates the draw on the vehicle's taillight circuit and is designed to work with vehicles using Pulse Width Modulation. This wiring harness will work with trailers that have either LED or incandescent lights. The hardwire kit includes the modulate wiring harness, 20 feet of 12 gauge wire, ring...
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  • Recommendation for Trailer Wiring a 2004 Mitsubishi Fuso FE
    I have a wiring solution for you, but there is no custom T-harness for your 2004 Mitsubishi-Fuso FE. The Upgraded Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness # 119190KIT is the best solution for a universal harness for your truck. This kit uses a powered converter with circuit protection to safeguard your vehicle and the module. It also includes everything necessary to hardwire it to your vehicle. Be sure to use the included tester to make sure you have the correct wires...
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    I can show you a wiring diagram for the # 119190KIT but what I think you will find even more helpful is the install video link I attached to this page that shows this kit being installed on a 2012 BMW X5 just like yours. This will show you exactly which wires to use for the harness and how to find them.
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  • Recommended Wiring Harness for 2005 Mercedes-Benz ML350 Special Edition with Factory Trailer Hitch
    Don't worry, I can help outfit your 2005 Mercedes-Benz ML350. The wiring harness that I recommend for your 2-wire system is the # 119190KIT. I have linked the instructions for you to see how the 2-wire system your ML350 has will install. You mentioned the two wires as turn and brake light being separate but you did not mention the tail light wire, you could in fact have a 3-wire system which the # 119190KIT will also fit, best thing to do is to use the included tester for all the functions...
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  • Power On Green and Yellow Wires with Circuit Protected Vehicle Wiring Harness 119190KIT
    It sounds like you may have an issue with the wiring for the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190KIT. There should not be 12 volts on the right turn/stop (green wire) and left turn/stop (yellow wire) at the trailer controller with the headlights on, only the running light circuit (brown wire). I recommend you check the wires that you have the green, yellow, and red wires on the above harness connected to. If your Sprinter Van uses the same...
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  • Troubleshooting a Trailer with no Left Turn Signal/Brake or Running Lights
    I attached an FAQ article that has a trailer wiring diagram for you to check out. I strongly suspect that the problem is the ground on the left side taillight assembly since both functions on this side of the trailer are not working. Make sure it is grounding to a clean metal surface, some assemblies ground through the mounting hardware so you need to make sure the assembly is attached to a clean metal surface. I attached an FAQ that should help you troubleshoot further if needed.
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  • Tow Ready 4-Pole Wiring Harness # 119190KIT Installation Video for 2014 Acura MDX
    The recommended wiring harness for your 2014 Acura MDX is the Tow Ready # 119190KIT. This kit includes a powered converter, connectors, fuse holder and a circuit tester, which is the best way to identify the functions carried on each of the vehicle wires. Although we do not have a video showing installation of this particular item in your particular vehicle, the overall process will be the same as that shown in the two linked videos. The process in general consists of locating and testing...
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  • Troubleshooting Shorted Out Powered Taillight Converter on 2007 BMW X5
    The converter is designed to provide circuit protection, to isolate any shorts from the vehicle wiring. In this instance, it served its purpose perfectly by blowing its internal circuit breaker before anything on the vehicle could be damaged. The circuit breaker shuts down before the short can reach the vehicle wiring, which explains why no fuses were blown. Before replacing the converter, I'd suggest you carefully examine the trailer wiring, looking for the short that caused the converter...
    view full answer...

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