Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.
Upgraded Circuit Protected ModuLite with 4 Pole Harness and Hardwire Kit - Includes Tester
This ModuLite Ultra Protector with integrated circuit and overload protection safeguards both itself and the tow vehicle against electrical shorts or mis-wiring situations.
Included with Hardwire Kit:
1987 - 1995 Toyota 4Runner
2017 - 2017 Fiat 500L
1984 - 1991 Pontiac 6000
1983 - 1992 Mazda 626
1985 - 1992 Volvo 740 Series
1984 - 1990 Volvo 760 Series
1988 - 1990 Volvo 780 Series
1993 - 1997 Volvo 850 Series
2005 - 2006 Saab 9-2X
2006 - 2011 Saab 9-3
1999 - 2009 Saab 9-5
1981 - 1998 Saab 900
1989 - 1998 Saab 9000
1991 - 1995 Volvo 940 Series
1991 - 1997 Volvo 960 Series
2015 - 2015 Audi A3
2006 - 2015 Audi A3
1998 - 2011 Audi A6
1989 - 1995 Plymouth Acclaim
1989 - 1995 Plymouth Acclaim
2002 - 2006 Nissan Altima
2002 - 2006 Nissan Altima
2008 - 2009 Saturn Astra
2017 - 2017 Cadillac ATS
2000 - 2003 Oldsmobile Aurora
1995 - 2003 Oldsmobile Aurora
1995 - 2004 Toyota Avalon
2000 - 2004 Toyota Avalon
2003 - 2006 Subaru Baja
2003 - 2006 Subaru BajaSee All Vehicle Fits
Video of Upgraded Circuit Protected ModuLite with 4 Pole Harness and Hardwire Kit - Includes Tester
Videos are provided As a guide only. Refer To manufacturer
installation instructions And specs For complete information.
Today we're going to be taking at look at the Tow Ready upgraded circuit protected ModuLite with the four pole harness and hard wire kit. This unit is going to provide a four way flat trailer connector at the back of your vehicle to power your trailer signal lights, and it's going to include everything that you need for a full installation. It's going to offer short circuit protection which is going to safeguard itself and the tow vehicle against harmful electrical shorts and miswire situations. It's going to virtually eliminate draw on the vehicle tail light circuit, so that's a great advantage to have with this system. The tail light circuit on this unit has been upgraded to work with vehicles using PWM which is pulse width modulation, allowing the converter to turn on fully giving the trailer maximum light brightness. This unit's going to power the trailer stop, turn, tail and running lights directory from the tow vehicle battery. It's going to prevent feedback from trailer to vehicle systems.
It can be used on two and three wire systems. Just keep in mind when used on a two wire system, the thin red wire which is going to be your brake wire, must be grounded. It's going to adapt a three wire system on the towing vehicle to a two wire system on your trailer. It will work on vehicle and trailers with either LED's, incandescent or standard bulb tail lights. It's also going to work with most vehicles that use a multiplex wiring system for lighting. Again, we're going to go over the components that it all includes.
When using this system, you're going to have a maximum amperage of 2.1 amps per side for the stop and turn lights and 5.6 amps for the tail lights. Included with the kit, you're going to get your four way connector. You can see we've got the wire bundled up here so that way you can extend the amount that you need out the back of your vehicle to make your connection to power your trailer signal lights. It's going to have the dust cap. That way we can protect the connection points when the connector is not being used. We can cover those up and that's going to help prevent any type of corrosion from settling into our connection terminals. The black box is going to be a converter box.
This is simply going to help avoid overloading the vehicle's electrical system. Then on this side, you're going to have all your wires. Your green wire is going to be for the passenger side turn signal. Your yellow wire is going to be for the driver's side turn signal. Your brown wire is going to be for your running lights.
The thin red wire is going to be for the brakes. The white wire with the ring terminal attached to it, this is going to be for your ground connection. Some vehicles that this unit will work with is going to have a grounding post in which you can slide this over the post and reinstall the hardware to make the ground connection. Some vehicles with not have that post. They include a self tapping screw so you can make that connection to a nice clean, metal surface. Then you're going to have your thick red wire. This is going to be your 12 volt power wire. It's going to connect to the bundled black wire here. This is going to be 20 feet of 12 gauge wiring. This is going to be the power wire that runs all the way to the vehicle battery. So the red wire is going to connect to the black wire using the included butt connector. It's also going to include a heat strength butt connector. Then you're going to have your fuse holder. Fuse holders are going to get cut right here in the middle. One end is going to connect to the other end of the black wire with the other butt connector. The other end of the wire is going to get one of the two ring terminals attached to it. That's going to connect to the positive post on the vehicle's battery. You're going to have a half inch ring terminal for side terminals and you're going to have a three eighth inch ring terminal for top terminals on the battery. You pick which one works best for your particular situation. You're also going to get the included 10 amp fuse. You're going to get some double sided adhesive tape. It's going to get applied to the back of the converter box here. That way you can stick it to a nice clean surface, keep it up and out of the way. Again, two butt connectors, two ring terminals. You're going to get five quick splice wiring connectors. This makes tapping into the wires quick and easy. Very simple system to use. You're going to get your grounding, self tapping screw and you're going to get your circuit tester. This is going to help find the wire functions behind the vehicle's tail lights to ensure that you are connecting everything correctly. Really nice system. Again, it's going to come complete with everything that you need for a full installation. They're even going to include some zip ties. That way you can secure any excess or slack in your wiring for a nice, clean appearance for your installation. That's going to do it for our review of the Tow Ready upgraded circuit protected Modulite with a four pole harness and hard wire kit.
Average Customer Rating: 4.6 out of 5 stars (84 Customer Reviews)This ModuLite Ultra Protector with integrated circuit and overload protection safeguards both itself and the tow vehicle against electrical shorts or mis-wiring situations.
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
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
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
by: Graham H.03/14/2016
I'm only sorry I didn't take photos of the installation of the trailer wiring. I have to say, it was the easiest most enjoyable install I may have ever done of this kind. I'm not the handiest when it comes to this type of thing, but coupled with the complete wiring and hardware setup, it really made all the difference. The video that accompanied my specific vehicle also made a world of difference, major high marks for this. The only thing that may have helped was a bit longer wire for the passenger side (green) wire, but that's probably not even worth mentioning though I did. I'm putting together a tow package for hauling a light motorcycle trailer, so I figured I'd try this myself and I'm glad I did, great instructions make all the difference! These guys include everything right down to the wire ties and it's all top quality heavy gauge wire. Thanks again and I'll be using you guys for sure in the near future. Graham 240723
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
by: Jack C. (79)07/14/2016
This is a clever device that I never knew about but it isolates the trailer light load from the auto system, the auto only supplying low power signals to the trailer light controller. I suggest a bunch of YouTube viewing to see how this is installed, they are excellent. Also see your owners manual for a trailer power wire to the trunk. My Volvo has this as fuse #14, and can be traced to the right taillight area, very handy. This big (red) wire supplies the power for the "controller" to distribute correctly to the trailer plug when you signal or brake, etc. No running the new wire supplied under carpet, the car body or anywhere. It works as designed and is not hard to put in overall. 1 Hour You Tube, 1/2 hr. trunk guts removal, 15 min. detecting which wires with the little tester supplied, 1 hr. installing, 1hr. putting trunk guts back and checking all out. It's very small, didn't use the tie-wraps. 272044
by: Dick P.10/29/2014
The Kit is outstanding - everything you need to install the kit is included with clear and complete instructions. This is from a complete novice in doing any car wiring. The most difficult part for me was running the wiring from rear to front in a 1985 Mercedes 300TD, there were no instructions for that vehicle BUT I really didn't expect them. Thank you for an excellent product and outstanding instructions to accompany it. 158311
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
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
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
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
by: Shawn S.01/01/2015
Excellent customer support. Quality of the installation video was also excellent. Regarding the product, I was a bit surprised at the wire harness length that connects to the trailer is designed to be pulled out of the back of the car and the rear hatch closed down on it (appears rinky-dink) rather than routed under the car and mounted to the hitch, but I think I will get used to it. Also, a nice touch would have been to include the grommet and clamps recommended in the video in the kit for a few more dollars. Unless you view the complete video prior to placing your order, you end up needing to improvise along the way when installing the product. 167492
by: Dan M10/30/2016
I'm very happy with the service and website here at etrailer.com. the harness and hitch I ordered was received a day ahead of the day I was expecting it, great job. The harness is well made and performed as I expected though I didn't use the supplied connectors. I used heat shrink connectors for weather resistance. There were no instructions package with the kit but a quick look on the website I found the instructions. Thy were very concise and accurate, I'm very happy and will be a return customer in the future. 312210
by: Mike W.03/18/2015
My package may have been missing an instruction sheet. Nothing in the package told me which wire from the module was for left turn signal, etc. I was able to get that from watching one of the installation videos that are with the product description on the web site. My installation was probably easier than most, because my 2004 LeSabre has the battery under the back seat. The thing I like most about it is that I know whatever trailer I might hook up to, it won't blow any tow vehicle fuses. 179408
by: Neil N.03/31/2015
Product delivered onetime and in great shape. The "how to" videos on attaching the trailer hitch and the trailer wiring harness made for an easy install. Very thorough. Just one comment to note: the green wire going to the passenger side was about 12" short. Had to splice. That being said…very pleased with these products and the finished look. Thanks. 181815
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
by: Bill K11/05/2014
This is a universal wiring harness and included fairly poor instructions to assist with my vehicle installation. Pretty much needed to figure everything out on my own including much more time than I would have expected to disassemble the interior of my wagon to locate the appropriate wires. But, it eventually worked fine. 159459
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
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
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
Etrailer is always awesome. I received my exact order very quickly. It would have been nice to receive installation instructions with the package, but e trailer has them on their web site and everything worked out great. E trailer has always had awesome products and service. 181747
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
I own a 2006 Volvo S60 and the installation video made this product a 15 minute install . The product was a breeze to install, and the amount of materials provided is very generous. My trailer lights work and I haven't popped any fuses yet so it seems to be doing well. 256786
by: Jacob L01/28/2015
Install was fairly easy. The hardest part was getting under the car to route the power wire, though putting both driver side tires on ramps gave me just enough room. No directions came in the package, but they have a video here on the site that explained everything. 171488
by: Martha N09/23/2016
So African only do this for shipping because the box will be open buy the man who fixes it to our car. So I will ask him when he finish in stalling it then offer more revise then ok Delivery got here on time and the carrier carried it in my house for me thank you. 300165
by: John B.09/26/2014
The product is excellent. The shipping was faster than I thought possible. The service and website works seamlessly. The ONLY thing that was a problem was that the package did not include a wiring diagram so it took a lot extra time to install. Didn't like that. 153133
by: David C06/17/2015
I bought this for occasional towing with my grand marquis. The kit is excellent, has almost everything you need to install. I really like the fact that the trailer is on a different circuit than the rest of the lights. The installation video is nice also. 204044
Great experience was able to talk to "real" Knowledgeable person. Product fit and works great. The only glitch was there wasn't a wiring semantic with the product ,but went on line etrailer had a video that explained the complete installation and wiring. 233479
by: Brian P08/20/2016
I've done three of these in the past year, on a truck and two sedans. The videos helped a lot--the written instructions were just ok. I took my time though, and all went well in each installation. The wiring and converter continue to work perfectly. 285970
Initially wasn't too confident that this harness would be compatible with our LR2, however to my relief after watching the eTrailer video, I was able to easily splice it into the existing factory trailer junction under the cargo area, driver's side. 200964
by: Ryan G07/22/2013
Hitch and wiring working great thanks 90874
by: Kevin c07/31/2015
Manufacturer of the product did not supply the entire directions but their website did. I had a question and a problem and Etrailer tech called me back and couldn't have been more helpful. Again very pleased with the service . 215720
by: Vance S.01/04/2015
This is a great product easy to install and works great. etrailer keep up the great work with the product combinations of hitch and wire harness. I would recommend yall to anyone looking for a hitch and wire harness. 167646
by: Ben E.08/06/2016
I ordered the hitch with express shipping and it came within the 5 day shipping time line. Kudos's for the quick response Emily! The hitch fits the vehicle correctly. I am impressed! Thanks for the good service. 280550
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
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
by: Nolita Slim03/06/2016
I ended up having my mechanic install this because you really do need to be able to have good access under the car as you need to run wires from the battery to the rear tail lights. It works great! 239831
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
by: Larry N.06/08/2016
I received the part I ordered in a timely fashion at a fair price. I think this is called "commerce". The instructional videos were comprehensive, clear and precise. 258908
by: John S12/30/2014
The wiring kit arrived quickly and looks easy enough. Can't say I have found time to install it yet but looking forward to it. Thanks for the fast service! Happy New Year! 167238
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
by: Pat M.07/09/2016
Straightforward installation with all parts included. Done in about half an hour. One year later no issues whatsoever. Done on a 2008 Mercury Grand Marquis. 269862
by: Toyota trailer tow bar10/02/2014
Great service! Friendly and knowledgable and my trailer bar came quick and was very easy to install. The videos they post on YouTube are very helpful. 154051
great product ,arrived yesterday installing now with the help of the video offered with the site that I purchased the harness. Looks easy. 206792
Works great after one year! Easy to install by yourself, not special training needed. Just a few common tools. I would buy this again. 271831
Came with absolutely no instructions. Fortunately I have installed others and didn't need them, but beginner would be baffled. 156414
The product seems good, and the hitch and wiring installed very easily with the installation You Tube video from etrailer. 149603
started installation finish it in about an hour and half pretty simple the testor with the kit worked great good product 102915
Instructions not included in package but found on internet and instruction from etrailer. Worked well 160252
by: Steve Ladd03/20/2015
Fast shipping, all good except no directions came telling how to connect the unit to my car. 179984
Ask the Experts about this Tekonsha Wiring
Do you have a question about this Wiring?
At etrailer.com we guarantee:
Highest quality wiring for the best price.
Real product know-how.
Most detailed, accurate wiring information available.
Information for this part was:
Installations, made easy.
Personalized service for life.
Trusted since 1946.
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.