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Custom Fit Trailer Wiring

Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers

Tow Ready Custom Fit Vehicle Wiring

ratingratingratingratingrating (34 reviews)

Code:   119179KIT



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Shipping Weight: 2 pounds


Tow Ready Custom Fit Vehicle Wiring - 119179KIT

Tow Ready Circuit Protected ModuLite Vehicle Wiring Harness with Hardwire Kit (Includes testers)


  • Short circuit protection safeguards itself and the tow vehicle against harmful electrical shorts and mis-wire situations
  • Virtually eliminates draw on the vehicle taillight circuit
  • Taillight circuit has been upgraded to work with vehicle using PWM, allowing converter to turn on fully giving trailer maximum light brightness
  • Powers the trailer's stop, turn, tail and running lights directly from the tow vehicle 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 a 2 wire system on the trailer
  • Will work on vehicle and trailer with either LED, incandescent, or standard bulb taillights
  • Works with most vehicle multiplex wiring systems for lighting
Overloading circuit can cause fires. Do not exceed lower of towing manufacturer rating or: Max. stop/turn light: 2.1 amps per side. Max. tail lights: 5.6 amps. Read vehicle's owners manual and instruction sheet for additional information

Included with Hardwire Kit:

  • Modulite Wiring Harness (119179)
  • Modulite Install Kit (118151)
    • 20' of 12 gauge wire, ring terminals, and inline fuse for battery connection
  • Circuit tester
    • To help find wires behind vehicle taillights to gather signals
  • (5) Quick splice wiring connectors
    • Makes tapping into wires quick and easy
  • Integrated 4-Pole Cover
    • Protects 4-pole connector from the elements and reduces dirt, debris and corrosion for trouble-free use

119180 Tow Ready Circuit Protected ModuLite Protector with Hardwire Kit

Video of Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers

Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

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Video Transcript for Trailer Wiring Harness Installation - 2007 Ford Mustang

Today on our 2007 Ford Mustang, we'll be installing the tow ready upgraded circuit protected modulite with 4 pole harness and hard wire kit part number 119179KIT. We'll begin by opening up the trunk of the vehicle. We'll first need to begin by removing this plastic threshold piece here at the back of the trunk. To do this, we'll unscrew the 2 tabs, 1 on each side and lift the center piece out. Now that we've got the center plastic threshold piece out of the way, it gives us the exposure to both the right and left side wiring harness. To unplug, you may simply push in on the locking tab and gently pull apart. We're going to go ahead and unplug them so we can use our test light and figure out which wire does which function for the lighting. Now that we have our test light grounded to the body of the vehicle, we'll go ahead and have someone run through the light functions. Now you'll notice because of the way the lights are set up on this Mustang that you'll have 2 hot wires or 2 live prongs for each of the light functions. For the running lights here on the driver side, we'll have a blue wire with a yellow stripe as well as a tan wire with a red stripe that are both running light functions.

For the turn function on the driver side, it will be the white wire with the red stripe or the blue wire with the red stripe and for the break, it will be the same 2 wires, the white wire with the red stripe or the blue wire with the red stripe. Now we'll go ahead and move over here to the passenger side where we'll again unplug the wiring harness and use our test light to see which wire is the turn signal and this one here, you can see it's the red wire with the white stripe. It's the same color wire for both prongs that are hot during the turn signal. Now we'll go ahead and go over the color wires of what does what on the modulite. The green wire will run over to the passenger side and we'll tie that in with the red wire with the white stripe as this would be the turn signal for the passenger side. The brown wire is the running light circuit, that will get tied in with the blue wire and the yellow stripe or the tan wire with the red stripe. The yellow wire is the break and turn signal function, so that will get tied in with the white wire with the res stripe or the blue wire with the red stripe over here on the driver side as well. Now the red wire, because its light function is a 2 wire, not a 3 wire system, we will be putting a ring thermal on the end of that and grounding it with the white wire that already has the ring terminal on it as that is the ground as well. The large red wire, we'll be using a butt connector and connecting the extra length of black wire that will run up to the positive side of the battery. Now in order to run the wire up to the positive side of the battery, we're going to need to locate a gramat here on the trunk that we can pull the wire through.

You take out the trunk lining here and set it aside, you'll see that there's a gramatover here on the driver side. We're going to go ahead and use the end of our test light to poke through the gramat where we can push the wire up from the bottom. With the wire pulled up into the trunk area, we'll go ahead and use a butt connector and connect the black wire with the large red wire on the modulite box. Next, we'll go ahead and add a ring terminal to the end of the red wire and then we'll take the red wire as well as the white wire and put it on the ground here at the back of the vehicle. Now we can go ahead and take the 2 sided tape that comes with the kit and we'll add it to the back of the modulite box. Before doing this now, we want to take a little rubbing alcohol and clean the back of the box as well as the area on the anterior portion of the trunk that we're going to stick the box. Once we have that done, we'll go ahead and put the 2 sided tape to the back of the modulite box and then peel the back of the 2 sided tape and secure it to the inner portion of the trunk.

Now that we have that done, now we're ready to use our quick splices and connect our brown wire, our yellow wire and our green wire in on the wiring harness. Now we'll begin with the brown wire to tie in with the running light circuit. We'll be using the brown wire from the modulite box and the blue wire with the yellow stripe. Now, when we squeeze the quick splice together, we noticed that it actually cut the "factory" 00:03:51 wiring harness, so in order to fix this problem, we'll go ahead and use the butt connector to make this connection instead and lay the brown wire in 1 side. Now that we have the brown wire connected, next we'll go ahead and use the quick splice and connect the yellow wire in with the white wire with the red stripe. Now that we've got these 2 connections made over here on the driver side, we'll go ahead and route the green wire over to the passenger side where we'll tie in with the red wire with the white stripe. Now we'll go ahead and finish running our power wire up to the front of the vehicle, so we'll go back underneath the vehicle to do this. We're going to route our power wire over here along the driver side up to the fire wall area of the vehicle.

Now as we pull the wire out of the gramat at the rear of the trunk, we went ahead and use a couple quarter inch wire loom clamps to secure the wire until we we're able to get it up underneath the vehicle. The metal loom clamp that we used is part number A0250 and we used 2 of these at the rear of the vehicle just outside the rubber gramat where we pulled the wire from inside the trunk. When routing the wire, make sure you stay away from areas they become hot, have sharp edges or may move as this could damage the wire. We'll then go ahead and use a section hold airline tubing to help us route our wire to the front of the vehicle. Now that we've got out power wire up to the firewall on the driver side, we'll go ahead and pull it up to the upper portion of the engine bay and then we'll route it across the fire wall over towards the battery. Again we use inaudible 00:05:15 ties to help secure the wire along the way. And once we're over here at the battery side, we'll go ahead and take our fuse holder and we'll have to cut the wire in half where 1 side will get a butt connector and the other side will get a ring terminal added. We'll then go ahead and cut the black wire to length and tie in with the yellow wire using the butt connector. We'll then go ahead and loosen up the positive side of the battery where in this case we'll trim out a section of the ruing terminal so it slides underneath the knot on the positive side of the battery. We can then go ahead and tighten it down. Once the wiring is secured to the battery, all that's left to do is put the 10 amp fuse in the fuse holder. Now that the install is complete. We'll go ahead and have someone run through the light functions again we use our test light to make sure that the 4 flat's working properly. With ground and the test light connected to the open prong in the 4 flat, we'll touch the brown wire for the running lights, the yellow wire for the left turn or driver side, the green wire for the right turn or passenger side and the green and the yellow wire for the breaks. As you can see, all the functions are working just fine. Now when you're using your 4 flat, want to make sure that you keep it away from the center trunk latch or in this case, there's another small prong that pushes down on the trunk. You want to make sure the wire goes in between these 2 when closing the trunk. The weather striping will push in enough to not damage the wire. When not using your 4 flat, you simply coil it up and store it in the corner of the trunk. And with that, that will conclude our installation of the tow ready upgraded circuit protected modulite with 4 pole harness and hard wire kit part number 119179KIT on our 2007 Ford Mustang. .

This Product Fits The Following Vehicles

1987 - 1995 Toyota 4Runner

1984 - 1991 Pontiac 6000

1983 - 1992 Mazda 626

1984 - 1992 Volvo 740 Series

1984 - 1990 Volvo 760 Series

1988 - 1990 Volvo 780 Series

1993 - 1997 Volvo 850 Series

2005 - 2006 Saab 9-2X

2005 - 2006 Saab 9-2X

2006 - 2011 Saab 9-3

1999 - 2009 Saab 9-5

1987 - 1998 Saab 900

1989 - 1998 Saab 9000

1991 - 1995 Volvo 940 Series

1991 - 1997 Volvo 960 Series

2006 - 2012 Audi A3

2006 - 2011 Audi A6

1989 - 1995 Plymouth Acclaim

1989 - 1995 Plymouth Acclaim

2002 - 2006 Nissan Altima

2002 - 2006 Nissan Altima

1995 - 2003 Oldsmobile Aurora

1995 - 2003 Oldsmobile Aurora

2000 - 2004 Toyota Avalon

2000 - 2004 Toyota Avalon

2003 - 2006 Subaru Baja

2003 - 2007 Subaru Baja

1992 - 2005 Pontiac Bonneville

1984 - 1990 Ford Bronco II

1984 - 1990 Ford Bronco II

See All Vehicle Fits

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Customer Reviews

Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers - 119179KIT

Average Customer Rating:  ratingratingratingratingrating4.5 out of 5 stars   (34 Customer Reviews)

- 119179KIT

ratingratingratingratingrating by: Dave V.07/12/2013

I bought the Draw-tite hitch and the Modulite wiring harness for my new 2013 KIA Soul and was overall very pleased with the service and the product ..... I'm glad I watched the installation videos when I ordered the items as I was unable to find them when I went back in to doublecheck a couple of details ..... the Modulite wiring harness did not come with any instructions at all ! And the hitch instructions didn't show the secret trick about lowering the muffler .... the videos were VERY helpful but I don't understand why I couldn't find them when I went back in ( admittedly, on a different computer ) to check .... But everything went together very well and is working perfectly ! E-trailer was very prompt, very competetively priced, and very helpful with their online videos ..... thanx, E-trailer ! 89335


Did your kia soul have led lighting? If so which brand did you buy and was it easy to run all the wires with go results. thanks jack

comment by: Jack B - 01/30/2014


You can use the 119179KIT harness with both LED light and non-LED versions of the Soul. Since the 119179 harness has its own power feed, the LED lights would be protected. We have installed the kit on a 2013 Soul and shot a video of it that I have linked below. If you let me know what year Soul you are working with and whether or not yours is LED, I can check to see if there are other options.

Patrick B - 2/5/2014

- 119179KIT

ratingratingratingratingrating by: Andrew M.06/24/2013

I purchased this product so that I could tow a small sailboat trailer behind my '94 Civic coupe. After finalizing my order online, I realized I had made a mistake and needed to change my order. I called the customer service line and a human customer service representative resolved the issue within minutes. Service was friendly and excellent, and shipping was prompt. Since the harness fits multiple makes and models a reference manual (Haynes, Chilton, etc.) for your specific vehicle is recommended to review wiring diagrams and find suitable wire routes. Ample wire is provided, and the attachment hardware was more than sufficient to make installation clean and secure. The power module and signal wiring is invisible behind the trunk paneling, and the trailer hookup discretely tucks under the carpet when not in use. 85728

- 119179KIT

ratingratingratingratingrating by: Paul C06/29/2013

The hitch installation went better than could be expected. Thirty minutes or so and I had the hitch installed. The wiring kit for my 04 Volvo XC70 was a little different story. I had read that the Volvo's had a towing package connector near the spare tire. I found it but was curious about what pin went where, A check of the web revealed that all the wire signals were there and already were buffered with relays and fused. I thought long and hard about using the wiring kit but decided to use it anyway. Once I had all the wiring figured out the rest was easy. The customer service person (Rebecca) really knew her stuff and was great to work with. The shipping was fast and it met all my expectations. You can't go wrong with etrailer. 86760

- 119179KIT

ratingratingratingratingrating by: switchback04/23/2014

Product delivered very quickly, as described. I found no installation instructions included but after a call to etrailer I was directed to a link where I could print my own copy of the installation instructions. This kit was going on a Infiniti EX35. Access to the inside area behind the tail lights was a mystery and not wanting to damage or break anything in the process, I opted to have my Infiniti dealer install the after market parts. The installation took the technician around 2.5 hours, mostly to disassemble and reassemble the back of the car. The wiring part is easy. This was not cheap, but it's done and works fine. This would be a good car for etrailer to do an installation profile on for the skilled DYIer. 126836

- 119179KIT

ratingratingratingratingrating by: Mark M05/06/2014

I bought the trailer electrical kit on the same order as a Curt hitch for my 2014 VW Jetta Wagon. Both items arrived on time packed in the same box and in good shape. I will use the hitch and light hook up to tow a small sailing dingy. I watched the install videos for both products and I found them very accurate as well as helpful. The hitch was installed as planned in about an hour. The light hook up took a little longer as I had to jack up one whole side of my car for access running a power wire up to the battery. I towed the boat to the water yesterday and all worked just fine. 129324

- 119179KIT

ratingratingratingratingrating by: Mark M.04/23/2014

Both the dealer and U Haul said they couldn't do a wire package for a 2013 Infiniti EX37. This kit worked just fine. Could have used instructions for the lighting adapter, but watching the video a couple of times and taking notes for which color did what seems to have worked. Delivery was quick. Thanks for the tester, couldn't have done without it. (Use a leather glove on the hand holding the wire!) 126924

- 119179KIT

ratingratingratingratingrating by: Bob S.06/04/2013

Bought this harness along with a hitch. This wiring harness was easy to install but the instructions could have been a little clearer. The color of one wire in the harness was misstated in the instructions. Once installed, it worked perfectly and only took about an hour and a half. 83368


Please tell me how U found the wires. :- I have an 08 EX35

comment by: chris b - 06/15/2013


You will need to use the included circuit tester to probe wires and check them for functions. One person will sit in the vehicle to activate tail lights, brake pedal, and turn signals. You will use a circuit tester to pierce the wires behind the tail lights to find which wire carries which function. Check out this video on the subject.

Patrick B - 6/18/2013

- 119179KIT

ratingratingratingratingrating by: Kyle B05/15/2014

Harness works great! It was straight forward for anyone with any wiring knowledge. The video was helpful but would have been more helpful with an instructional sheet included. I called customer service to ask a question and they were very helpful and quick in response. Good product at a good price. 130749

- 119179KIT

ratingratingratingratingrating by: TS05/28/2013

The trailer hitch was just as described and the install process was very easy. The online video helped and the wiring package was time consuming but I took my time and did everything properly and ran wires in an orderly fashion. All items needed for a successful install were included and FAST shipping. 82174

- 119179KIT

ratingratingratingratingrating by: Mike T.09/10/2013

Worked just fine. Wiring was not as difficult as I had expected for my particular car (BMW 328) Just wished that there had been a youtube video for my car. But it went ok just the same. One other thing, I could have used two butt connectors rather than just the one that was supplied with the kit. 99203

- 119179KIT

ratingratingratingratingrating by: Miki10/12/2013

Trailer hitch receiver and wiring kit for a Honda Civic ... I was impress with how quickly the product arrived. It arrived in excellent condition and was easy to install, just as the web page stated. I will definitely purchase products from this company in the future! 103569

- 119179KIT

ratingratingratingratingrating by: Ryan G07/22/2013

Hitch and wiring working great thanks 90874

- 119179KIT

ratingratingratingratingrating by: David C03/15/2014

Product arrived in a timely matter, appears to be of high quality and was relatively easy to install. The inclusion of a circuit tester was a welcome feature. If the products' longevity matches its' appearance, it is an excellent buy. 120841

- 119179KIT

ratingratingratingratingrating by: Richard S.09/18/2013

The kit was straightforward to install. It took me about 4 hours and presto....working trailer lights for my VW Sportwagon TDI. 100505


Rich did you have any problems ? My VW dealer says my lights wont work properly if I hook this up.

comment by: jack - 07/25/2014


- 119179KIT

ratingratingratingratingrating by: Pete07/12/2013

Straight forward installation. I am comfortable with 12V DC work and chose to solder all wires rather than using the "wire taps". Install was fun and everything worked right the first time! Thank you E-Trailer! 89330

- 119179KIT

ratingratingratingratingrating by: FMR06/30/2013

Arrived timely. No parts missing. Everything lined up correctly. The electrical hook-up was not a plug in. I wish I had known I needed an end plug for the Saab 9-5. Direct-wiring it took extra time. 86830

- 119179KIT

ratingratingratingratingrating by: Steve w10/28/2013

Ez hook up, all worked great, only issue was the instruction for the module were not in package but a quick call to them and boom all was solved. I will be ordering from them again!! 105366

- 119179KIT

ratingratingratingratingrating by: Thomas07/02/2014

Everything was quick and easy just wish I had Instructions for wiring harness so I would have know what wires went to what. I had to look on line more then once. 138903

- 119179KIT

ratingratingratingratingrating by: Wayne09/02/2014

The product seems good, and the hitch and wiring installed very easily with the installation You Tube video from etrailer. 149603

- 119179KIT

ratingratingratingratingrating by: Arod10/07/2013

started installation finish it in about an hour and half pretty simple the testor with the kit worked great good product 102915

- 119179KIT

ratingratingratingratingrating by: Tom mccarney12/09/2013

Product, service, and delivery was excellent, but no wiring diagram for my car was included. 109669

- 119179KIT

ratingratingratingratingrating by: Todd H.08/26/2014

Product good, wiring instructions could use some work. Watch the video and you'll be ok. 148709

- 119179KIT

ratingratingratingratingrating by: Dennis C06/23/2014

Arrive promptly and is exactly what I ordered. Very quality product and easy to install 137061

- 119179KIT

ratingratingratingratingrating by: K&K Electric04/25/2014

Installation was not quick, but it got done and worked well on our cross country journey 127278

- 119179KIT

ratingratingratingratingrating by: TJ J01/02/2014

Went in easily with the instructions and works perfectly. Thanks! 111719

- 119179KIT

ratingratingratingratingrating by: Matt02/24/2014

Excellent product. Very well written instructions. Easy install. 117423

- 119179KIT

ratingratingratingratingrating by: Neil04/18/2013

Super fast shipping, hitch fit like a glove ! Awesome service. 76708

- 119179KIT

ratingratingratingratingrating by: Greg08/11/2013

Very nice product easy to install and works as it should. 94416

- 119179KIT

ratingratingratingratingrating by: hubert h08/08/2014

got it on car but no trailor yet to try it 145150

- 119179KIT

ratingratingratingratingrating by: David White07/18/2013

Good price; fast shipping; great product 90177

- 119179KIT

ratingratingratingratingrating by: Justin08/12/2014

Great product has everything you need 146162

- 119179KIT

ratingratingratingratingrating by: Ryan k08/11/2014

Good product 146123

- 119179KIT

ratingratingratingratingrating by: John J.05/06/2013

Very Easy! 79160

- 119179KIT

ratingratingratingratingrating by: j. forbes11/22/2013

nice 108103


Ask the Experts about this Tow Ready Custom Fit Vehicle Wiring
Expert Answers about Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers - 119179KITDo you have a question about this Custom Fit Vehicle Wiring?

  • Compatibility of Magentic Towing Light that has a 4-Round Plug and RV that has 6-Round Trailer Plug
  • Since the 119176KIT (installation details linked below) gets the power for the lights directly for the vehicle battery, it does not require any power from the vehicle wiring. It only receives the signals from the vehicle wiring. However, the 119179KIT has a 4-Way flat style connector. The Roadmaster Deluxe Magnetic Tow Lights, # RM-2100, that you have referenced, uses a 4-Round type connector that is not compatible with a 4-Flat. There is no easy way to adapt the two to work together. The...
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  • Will Hidden Hitch Class III Hitch Receiver, Part # 87595, Fit a 2014 Jeep Grand Cherokee
  • Hidden Hitch Class III 2-Inch Hitch Receiver, Part # 87595, will fit a 2014 Jeep Grand Cherokee. It is compatible with versions both with and without the OEM tow hook. This hitch installs without drilling or welding using existing vehicle hardware. I have linked a video showing the installation process in a 2012 Grand Cherokee. Written installation instructions are also included. Please note that this hitch does not include a ball mount, hitch pin or clip. A link provided will take you...
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  • Vehicle Wiring Harness Options for a 2012 Toyota Highlander
  • I spoke with my contact at Curt and verified the Curt T-Connector Wiring Harness, part # C56034, is the correct wiring harness for your 2012 Toyota Highlander. The Tow Ready Wiring Kit, part # 119179KIT, will work on your vehicle, but it will not use the plug-in ports on the vehicle wiring. It will require splicing into the tail light, brake light and turn signal light circuits on your vehicle, but it does come with all tools needed to complete the task. I have included the installation...
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  • What Is the Difference Between the Hidden Hitch and the Draw-Tite Hitch for a 2009 Volkswagen Tiguan
  • The Hidden Hitch, part # 87600, and the Draw-Tite, part # 75658, are essentially the same receiver hitch and will perform the same. These are two different manufacturers that offer hitches of similar design, the real difference is in the product name and price. I would recommend the Hidden-Hitch for your vehicle, because it is less expensive and has the same capacity as the Draw-Tite hitch. Along with the hitch you are considering you may also need the following items. Drawbar ...
    view full answer...

  • Adding In-Bed 5th Wheel/Gooseneck Trailer Wiring on a 2013 Dodge Ram 3500
  • For the 2013 Dodge Ram 3500, if the truck came with a factory 7-Way trailer connector (most of them do), then there are 2 options for adding in-bed 5th wheel/gooseneck trailer wiring. First, you can use # 41157. This connector plugs in line with the factory 7-Way just behind the connector at the back of the truck. Second you can use # PK11893-11932. This harness also plugs in line with the factory connector but requires a little manual hardwiring as well. The diagram for this is on the...
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  • Trailer Wiring Recommendations for a 2010 Volkswagen Tiguan
  • There are two options for adding trailer wiring to your 2010 Volkswagen Tiguan. First, you can use Upgraded Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness with Install Kit, # 119190KIT. I have included a link to the installation details and a video showing a basic installation below. You could also use Curt PWM Powered Converter - Stop/Tail (ST) -Circuit Protected, # C56200KIT. I have included links to the installation details and a video of an installation below. Your...
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  • Trailer Hitch and Wiring Recommendation for Subaru Impreza 2008 WRX Hatchback/Wagon
  • I would recommend the Hidden Hitch Class 1 Trailer Hitch, item # 60893, for your 2008 Subaru Impreza five door Wagon. This hitch comes with the drawbar pin and clip, so all you will need to complete your towing setup is wiring and a hitch ball. All of the hitches available for your vehicle are Class 1 rated and will require some enlargement of access holes to install so there is no real advantage of one over the other. We have the wiring kit your vehicle needs which is the Upgraded...
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  • Trailer Hitch Recommendation for a 2010 Subaru Impreza Outback Sport
  • For your 2010 Subaru Impreza Outback Sport, I recommend the Curt Trailer Hitch, # 11315, that you have referenced, because it has a slightly lower install difficulty than the other available hitches. We base install difficulty on how long it takes to install a hitch and the Curt hitch is a 5 out of 10. This means for a novice it should take about 50 minutes to install the hitch. This is a Class I trailer hitch with a 1-1/4 inch receiver opening capable of 200 pounds tongue weight capacity...
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  • Brake Controller Recommendation for a 2004 Toyota Tundra with Factory Tow Package
  • Yes, the # 5100 and # 3040-P brake controller will work after the vehicle specific wiring adapter is wired to the brake controller wires and plugged in to the connector stored near the vehicles emergency brake pedal under the dash, if your Tundra has a factory installed hitch and 7-way connector. If your Tundra does not have the factory installed options the brake controller will have to be hard wired to the vehicle and you will have to run wires and install a 4-way connector, # 119179KIT...
    view full answer...

  • Trailer Hitch Recommendation for a 2007 Honda Civic SI 4-Door
  • Yes, we do have hitches that will fit a 2007 Honda Civic SI 4-Door. I recommend the Hidden Hitch Trailer Hitch, # 60822. It comes with a ball mount, pin and clip. I have incldued a link to the isntallation details and a link to a video showing a typical installation.You would just need a properly sized ball, like # 19256 (1-7/8 inch diameter) or # 19258 (2 inch diameter) and trailer wiring. For wiring, use Upgraded Circuit Protected Taillight Converter Hardwire Kit, # 119179KIT. I have...
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  • Comparison Between Curt Tail Light Kit # 56146KIT and Tow Ready 4 Pole Harness # 119179KIT
  • The Tow Ready 4 Pole Harness # 119179KIT you referenced is a compatible fit for your 2010 Audi A3; however, the Curt Tail Light Kit # 56146KIT is not. Another trailer wiring kit that will work for your vehicle is the Hopkins Active Tail Light Converter # 46255. Both kits are similar in that they are universal fit with powered converters, come with install kits, and are very close in price. The Tow Ready kit comes with a circuit tester, (5) quick splice wiring adapters, and has a slightly...
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  • Which Vehicle Wiring Harness Will Work On A 2011 Kia Sorento
  • For the 2011 Kia Sorento SX models the LED tail lights is one major reason why the Tow Ready Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit, part # 119176KIT, is needed. The problem is that LED lights use much less power than incandescent bulbs. Because less power is required, lower rated wiring and other components can be used on the vehicle. When a trailer is connected, it requires extra power draw and the wiring in the SX model is not sufficient to handle the...
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  • Selecting Hitch and Wiring For 2002 Mercedes ML320
  • Two of our most popular hitches for your 2002 Mercedes ML320 are Hidden Hitch part # 87469 and Draw-Tite part # 75087. These are also the strongest. We do not have an installation video for one of these vehicles yet, however, I will include links to the .pdf instruction files. These are the same instructions that come with the hitch. There are also some helpful pictures towards the bottom of the product page. There is no custom fit harness for your ML320. If you do not have a 4-pole...
    view full answer...

  • Will Installing a Trailer Hitch and Wiring Void the Warranty on a 2010 Kia Forte
  • Installing a trailer hitch will not void the warranty on your 2010 Kia Forte. There is a federal law that states in part that unless the installed item is directly responsible for a failure then the warranty cannot be voided. With that said, the Curt Trailer Hitch, # 11019, is specifically designed for the Koup model Kia Forte. I have included a link to the installation instructions below. This hitch comes with a ball mount, hitch pin and clip. All you would need for towing is a ball,...
    view full answer...

  • Is Optronics Sealed Streamline LED Trailer Tail Light Designed to be used with a 4-Wire System
  • The Optronics Streamline LED Trailer Light is designed to be used with a 3 wire system, not a 4 wire. It has 3 wire leads, one for ground, one for tail light and one for a combined brake/turn signal. You can use this, you will just need a converter to bring the system down from a 4 wire to a 3 wire. If this is for a trailer behind your 1988 Toyota pickup, you can use a trailer harness with a built in converter like part # 119179KIT. If this is for some other sort of project you could...
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  • Installing a Brake Controller on 2005 Toyota Tundra
  • The factory installed brake controller connector should be a white plug located on the left side under the drivers side dash on your 2005 Toyota Tundra Dual Cab. I have included a photo and a video that shows the location of the plug on another Toyota Tundra at the 8 second mark. This plug may not be there if your vehicle did not come with the factory tow package. The Multi-Plug, # 20137, is designed as a replacement if your vehicle came with a factory tow package that included the...
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  • How to Wire TowReady Harness Kit # 119179KIT in a 2005 Ford Crown Victoria
  • To wire Tow-Ready Harness # 119179KIT I have a picture attached from the installation directions describing the connection points for each wire. I have attached the installation instructions as well as our FAQ for wiring, which is very thorough. This FAQ designates each wire and its purpose.
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  • Availability of Trailer Wiring and Hitch for a 2003 Mercedes ML350
  • Yes, we have the trailer wiring components needed to install a 4-Way trailer wiring harness on your 2003 Mercedes ML350. You will need the Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit, item # 119179KIT. This kit includes all of the parts needed to install the wiring on your vehicle along with a circuit tester to find the correct circuits to splice to. The wiring for your vehicle requires that a power wire be ran to the positive post of the battery through an...
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  • Running Lights Not Working when Using a T-One Vehicle Wiring Harness On a 2009 Nissan Frontier
  • The first thing I would do is check the fuse box on the vehicle and make sure that there is not a trailer tow package fuse blown. There is usually a legend under the lid on the fuse panel to find which fuses to check. Next I would check the connector on the vehicle, visually and with a circuit tester, item # 3808. If there is no tail light wire ran to the connector you will need the Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit, item # 119179KIT. This kit...
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  • Hidden Hitch # 60273 Recommenation for a 2007 BMW 328i
  • Although it is not a completely hidden hitch, the Hidden Hitch Class I 1-1/4 Inch Hitch, part # 60273, will work on your 2007 BMW 328i. The hitch will include the ball mount and the pin and clip. All of the hitches for your vehicle will be designed to end up in the same location, so there is not really any one hitch that is more hidden then the other. I am including a link to the installation instructions on the hitch and it will show where the hitch will be located on your vehicle. You...
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  • Will Curt Trailer Hitch, # 13445, Fit Flush Or Stick Out On 2006 Lexus GX470
  • The Curt Trailer Hitch, # 13445, will fit flush with the rear bumper. There is no drilling required. The tow hooks do have to be removed and the exhaust needs to be lowered when installing the hitch. If you have a factory 7-Way plug on the back of your vehicle it may need to be relocated. Anytime you are going to be installing a hitch to your 2006 Lexus GX470, you will need to check your owners manual for the vehicles maximum towing capacity. You will want to make sure that your vehicle...
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  • Installation Difficulty and Suspension Concerns When Using a Trailer Hitch on a 2007 Lexus IS250
  • We usually gauge trailer hitch installation difficulty by how long it takes to install the hitch. This hitch requires that the exhaust be temporarily lowered and that a heat shield be modified or trimmed so the hitch will fit. We estimate that if you have all the proper tools and another person to help, it will take about 50 minutes to install the Curt Trailer Hitch, # 11372. If you have some automotive experience, this installation will be mildly difficult. I have included a link to the...
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  • What Comes with Trailer Wiring Harness # 119179KIT for a 2002 Ford Crown Victoria
  • The Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit - Includes Testers, # 119179KIT, comes with everything you see in the picture on the product page. This includes the 119176 harness, a Modulite install kit, # 118151, 5 quick splices, and a circuit tester, all packaged together. This is the correct harness for your 2002 Ford Crown Victoria. Harness # 119179 (# 119179 Tow Ready Circuit Protected ModuLite Protector with Hardwire Kit), is just the harness and does...
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  • Will Draw-Tite Trailer Hitch # 75087 Fit a 2005 Merecedes ML350 Special Edition
  • I spoke with my contact at Draw-Tite and he stated that the Draw-Tite Trailer Hitch, # 75087, will fit your 2005 Mercedes ML350 Special Edition. I have included a link to the installation details below. If you plan on doing some towing, the recommended ball mount is # 2923 with ball # 19260 (1-7/8 inch diameter), # 63845 (2 inch diameter), or # 63853 (2-5/16 inch diameter). For trailer wiring you would need Upgraded Circuit Protected Modulite with 4 Pole Harness and Hardwire Kit, #...
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  • Brake Controller, Weight Distribution and Sway Control Recommendations for a 2005 VW Touareg
  • I recommend the Tekonsha P2, # 90885. It is one of our highest rated and most popular brake controller models. If your 2005 VW Touareg has a factory tow package, then you will just need to connect the wires from the brake controller to the tow package wires under the dash. You will need to remove the lower appearance panel beneath the dash and to the right of the emergency brake pedal. The tow package wiring will be on the left, wrapped in grey foam. Connect the white wire on the brake...
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  • Wiring a 2011 Victory Motorcycle and Trailer for Towing
  • For simplicity, I would recommend wiring the motorcycle trailer as a vehicle trailer would be. A powered converter wiring kit, like part # 119179KIT, would be connected to the motorcycle, which would provide a 4-pole trailer connector. The converter combines the brake lamp and the directional signal onto one circuit. The 4-pole connector utilizes four circuits, the white wire which is the ground, the green wire carries the right turn and brake light combined on one circuit, the yellow...
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  • Headlight Switch Does Not Work After Installing Trailer Wiring Harness in 2012 VW Jetta SportWagen
  • The power wires only function is to power the trailer tail lights and isolate the power draw from the trailer so the vehicle is protected. The situation you are experience should not have anything to do with the power wire unless something was really wire incorrectly. I have not heard of this problem occurring. But Volkswagens can be tricky. You have to be absolutely sure you have the correct wire so testing the wiring with a circuit tester like # 3808 is a must. I wonder if during...
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  • Ground Clearance Of Curt Trailer Hitch # 11344 Installed On 2007 Audi A6
  • I contacted our representative at Curt about the Curt Trailer Hitch, part # 11344. He informed me that from the bottom of the receiver to the ground, there is 9 inches of clearance. The distance from the top of the receiver to the ground, will measure 10-1/4 inches. The representative at Curt sent a picture showing the hitch installed on an Audi A6. I have used Photoshop to illustrate the ground clearance you will have with part # 11344 installed on your Audi A6. The Curt Hitch #...
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  • Trailer Wiring Harness With a Powered Converter for a 2003 Volkswagen Jetta Wagon
  • We do have a wiring harness with a powered converter for your 2003 Volkswagen Jetta Wagon. I recommend using the Tow Ready Upgraded Circuit Protected Modulite, # 119179KIT. Since you are having power issues with your current wiring harness, I recommend removing that wiring harness completely and install the Tow Ready harness per the installation instructions. I have attached the instructions for you to check out. This harness includes a circuit tester, so I recommend using that circuit...
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  • Difference Between the 119175KIT and 119176KIT Trailer Wiring Harness for a 2006 Volvo XC70
  • The difference between the # 11978KIT and the # 119179KIT wiring harnesses is that the # 119179KIT includes a power wire that provides the power for the trailer lighting, directly from the vehicle batter. The converter box in the # 119179KIT wiring is simply a switch that allows the proper signal to be sent to the trailer lights when the vehicle lighting circuits are activated. With the # 119179KIT, the vehicles sensitive circuitry is protected and is only supplying about 5 milliamps for...
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Info for this part was:

Test Fit:
Joe V

Expert Research:
Michael L

Video Edited:
Zack K

Video by:
Andrew K

Expert Research:
Michael H

Expert Research:
Jameson C

Video by:
Joshua S

Test Fit:
Nicholas E

Expert Research:
John H

Expert Research:
Brandon M

Video Edited:
Andrew L

Expert Research:
Adam R

Test Fit:
Shane T

Expert Research:
Lori W

Expert Research:
Rachael H

Expert Research:
Jeffrey L

Video by:
Alan C

Video Edited:
Sue W

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