T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

• Troubleshooting No Power at Factory Port on 2017 Lexus RX 350 without Factory Tow Package
  If your 2017 Lexus RX 350 didn't come with the factory tow package then an additional harness with a powered converter is needed to actually activate the plug that you used to install the Tekonsha T-One Vehicle Wiring Harness # 118252. This Tekonsha harness is designed for vehicles that came equipped with the factory tow package. Unfortunately, the converter harness is not available as a separate item from the manufacturer so your only option is to get the Tekonsha T-One Harness # 118255...
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• How to Determine if 2017 Lexus RX350 Has Factory Tow Package
  I'm assuming that you're needing to know so you can choose the correct wiring harness, correct? You could call your Lexus dealer and give them your VIN, and they should be able to tell you how your RX350 is equipped. Or, you could remove the inside cargo area bulkhead on the passenger side to find the gray tow package plug. If there is already a black taillight converter box plugged into the connector, you have the tow package and would use the # 118252. If there is nothing plugged into...
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• Best 4-Pole Wiring Harness for 2018 Lexus RX 350 with Factory Towing Package
  The 2018 Lexus RX 350 with the factory tow package wiring prep will have a connection point designed to match the plug on parts # 118252, # 56083 and # HM11141945. Each of these three similar items will work with the factory tow package that has a square connector to mate with the one shown in the included photo. Of these three products I recommend the Tekonsha # 118252 because we find their electrical items to be the most reliable of all those we offer. Please refer to the included...
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• Wiring Harness Options for a 2014 Lexus RX450h
  Yes, that is consistent for your 2014 Lexus RX 450h as well. I checked the online owner's manual for your vehicle and the fuse locations were the same. You can verify this with your copy of the owner's manual as well. I found the fuse location charts started on page 694. If you do have the factory tow package then part # 118252 is what you are needing. If you do not have the factory tow package then the T-One # 118255 is what you need instead. This has the same wiring harness for the...
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• Trailer Wiring Recommendation for a 2013 Lexus RX 350 without Tow Package
  The # 118252 is designed to be attached to a plug under the rear of your vehicle. If you do not have the plug or it is not active, I have a solution for you. The Curt # C59236 would be the perfect solution for your 2013 Lexus RX 350. I spoke with my contact at Curt and he verified that this harness will work for your vehicle. This universal harness will hardwire directly into your vehicle's wiring and bypass the factory tow package setup.
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• No Power to Trailer Wiring Harness on a 2012 Lexus RX 350
  The trailer wiring harness # 118252 is designed to fit a 2012 Lexus RX 350 that came with the factory tow package. If your RX 350 did not come with the factory tow package then harness will not work. If you are unsure if your model has the factory tow package you can have a Lexus dealer run the VIN in their system and tell you how the vehicle is equipped. There are fuses if the vehicle has the factory tow package. under the hood in locations 43 and 44, and in the cab of the vehicle...
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• Troubleshooting No Trailer Lights With New Wiring on 2015 Lexus RX 350
  Not necessarily. If your 2015 Lexus RX 350 came with the tow package then you just need the T-One # 118252, but if it doesn't have the tow package then you need the T-One # 118255 with the converter. The tow battery fuse slot would only be used if you were installing a 7-Way. Since the connector for the lights just have 4 pins for the trailer lights and ground I don't think it will really matter if you have a fuse in the tow battery slot or not. Before purchasing a wiring kit with the...
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• Trailer Wiring for 2018 Lexus RX 350L Without Factory Tow Package
  If you are sure your 2018 Lexus RX 350L does not have the factory tow package then your only option is to hardwire a 4-way to your vehicle with a universal kit, the Upgraded Modulite Vehicle Wiring Harness Kit with 4 Pole Trailer Connector # 119147KIT. This kit is going to require you to splice into wires as well as run a 12 volt hot lead from the battery of your 2018 Lexus RX 350L. I have added a link to a video of an installation for you to check out; it can be difficult so this is...
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• Trailer Wiring Harness # 118252 Not Working on a 2012 Lexus RX 350
  The trailer wiring harness, # 118252, is for a 2012 Lexus RX 350 that came with a factory tow package. It sounds like your RX 350 does not have the factory tow package so you would need to use trailer wiring harness # 118478. If your vehicle is supposed to have the factory tow package (have the dealer run the VIN to determine if it does or does not have the tow package) then the missing components to make it active could be obtained through a dealer. I have included a link to the...
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• Everything Needed to Tow a Trailer with a 2017 Lexus RX 450h
  For just the electrical side of things for your 2017 Lexus RX 450h we have the Tekonsha T-One # 118252 if you have the factory tow package or the T-One # 118255 if you don't have the factory tow package. Either of these gives you a 4-Way for the basic trailer light functions. One you have installed the T-One harness the next step is to install a 7-Way. For this we have the Upgraded Wiring Kit # ETBC7L. This includes everything that you need for a fully functioning 7-Way and a brake controller. Since...
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• Trailer Wiring Harness for a 2016 Lexus RX 350 without Factory Tow Package
  The base model 2016 Lexus RX 350 is not likely going to have the factory tow package. But to be sure you could have a Lexus dealer run the VIN to tell you how the vehicle is equipped. Without the factory tow package I recommend trailer wiring harness # 119250KIT. This harness does not require any splicing into the vehicle wiring. Its connectors clamp around the vehicle wires to detect the current passing through them.
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• Troubleshooting Wiring Harness for 2010 Lexus RX 350
  The trailer wiring harness, # 118252, is for a 2010 Lexus RX 350 that came with a factory tow package. It sounds like your RX 350 does not have the factory tow package so you would need to use trailer wiring harness # 118478. If your vehicle is supposed to have the factory tow package (have the dealer run the VIN to determine if it does or does not have the tow package) then the missing components to make it active could be obtained through a dealer. I have included a link to the...
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• Finding the Right Tail Light Wires to Install a Trailer Wiring Harness on a 2016 Lexus RX 350
  You will need to use the included circuit tester with the # 119250KIT wiring kit to test the tail light wires on your vehicles and then make the connections accordingly. The connectors are labeled. The one with the yellow sticker is left turn signal, red is brake lights, brown is running lights, and green is right turn signal. There is also a white ground wire and a power wire. The power wire will attach to the vehicle battery. I have linked an article with tips on routing the power wire.
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• Items Needed to Tow a Trailer with a 2011 Lexus RX350 Without Tow Package
  To tow your boat trailer with your 2011 Lexus RX350, you will need a trailer hitch, wiring harness, ball mount, pin and clip and a hitch ball. For a trailer hitch, I recommend the Draw-Tite Class III Trailer Hitch, # 75676. This trailer hitch has a 4,000 lb towing capacity and a 400 lb tongue weight capacity. It is important that you verify the towing capacity of your vehicle before you attempt to tow a trailer. If your vehicles towing capacity is less than of the hitch, you will need...
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• Removing the Protective Cap on a 2010 Lexus RX 450h to Install a Trailer Wiring Harness
  On the protective cap covering the connection point for trailer wiring on the 2010 Lexus RX 450h, there will be a locking tab on one side. You will need to push in the locking tab with your thumb and at the same time pull the cap off. When you go to connect harness # 118252 the locking tab on it will snap into place on the factory connector. I have included a link to the installation instructions for you.
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• Recommended Trailer Wiring Harness for 2018 Lexus RX 350 with Tow Package
  For your 2018 Lexus RX 350 the Tekonsha T-One Vehicle Wiring Harness # 118252 will work perfectly. This custom harness will plug right into the OEM tow package port behind the rear bumper (see attached image) and provide you with a 4-Way connector to connect with and power your trailer's signal lights. Tekonsha is well known for producing durable and long-lasting wiring harnesses. I have attached an installation video that you can also use for reference.
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• Wiring Harness on 2016 Lexus RX 350 for 5-Way Connector on Trailer with Surge Brakes
  For a 5-way trailer connector on your 2016 Lexus RX 350 you'll first need a 4-way. If the Lexus includes the tow package you can use # 118252 which will plug into a connector just under the rear bumper. If it does not have the tow package then # 118255 is what you'll need which has a 4-way that plugs into the same place, as well as a ModuLite power module that plugs behind a trim panel in the rear cargo area. Once you have a 4-way you can then use # 47515 which plugs into the 4-way...
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• Correct Wiring Harness for 2013 Lexus FWD RX 350 w/ Tow Package
  Both will work fine actually, the Curt Harness part # 56083 has been confirmed to fit by Curt on your 2013 Lexus RX-350 and we had a customer try the # 118252 on a 2013 model and it worked for him as well. If you look at the grey connectors on both of the harnesses you will see that they are the exact same.
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• Installing Tekonsha T-One Wiring Harness # 118252 on 2018 Lexus RX 350L with Tow Package
  I spoke with my contact at Tekonsha and he said that if your 2018 Lexus RX 350L has the tow package there should be a factory plug somewhere on the driver side behind the rear bumper into which the Tekonsha # 118252 will connect. You may need to dig around a bit to find the plug which will have a protective cap on it. He said that there isn't a difference with the factory wiring between the Lexus 350 and 350L models. I have attached an installation video that you can follow along with...
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• Location of Trailer Wiring Harness Connector on 2010 Lexus RX350 Equipped with Tow Package
  The connector for the # 118252 is located behind the rear bumper of the vehicle, just a bit left of the rear bumper center-line. The photo I produced will show the location. Before purchasing the # 118252, confirm the presence of the connector. You should also remove the protective cover from the end of the plug and use a circuit tester like part # 40376 and confirm that the circuits are active. One of each of the 4 sockets in the connector should show power when the left turn, right...
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• Correct Trailer Wiring Harness for 2015 Lexus RX350
  There are two different Tekonsha 4 pole options for the 2015 Lexus RX350, the # 118255 or the # 118252. The # 118252 is a factory replacement, which means it's a replacment for a damaged factory connector and will only work if your vehicle arrived from the factory with a 4 pole trailer connector. If it did not have a factory connector, you'll need the # 118255. Unfortunately, it's not just a matter of adding a fuse or relay to activate the tow package wiring so the # 118252 will work....
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• Where Does the Trailer Wiring Harness 118252 Install on a 2010 Lexus RX 350 with Towing Prep Package
  The vehicle side connector for trailer wiring on a 2010 Lexus RX 350 will be located behind the rear bumper more on the driver side of the vehicle. The connector will connect to the vehicle end of the Tow Ready wiring harness (gray plug) # 118252. I have included a link to the installation instructions for you.
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• Trailer Wiring for 2019 Lexus RX 350
  We have two really great and easy to install trailer wiring harnesses that fit your 2019 Lexus RX 350. We have the Tekonsha kit part # 118255 for if you do not have the factory tow package, or if you did have the tow package part # 118252 which is just the 4-way connector of the # 118255. Most reliable and efficient way to determine if your vehicle has the tow package is to contact a Lexus dealer with your VIN and they'll be able to look up what options the vehicle came with.
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• Parts Needed to Add a 7-Way Trailer Connector and Brake Controller on a 2012 Lexus RX 350
  No, trailer wiring harness # 118252 only provides the basic lighting functions (turn signals, brake lights, and running lights). If the trailer has electric brakes then you would need to add another connector, the most common of which is the 7-Way blade style. After installing the 4-Way, # 118252 if the vehicle has the factory tow package or # 118478 if it does not, you would then install a 4 and 7-Way installation kit # ETBC7. I have included some links that explain this installation...
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• Trailer Wiring Harness Recommendation for a 2010 Lexus RX 350
  The most reliable method is to take your VIN to a Lexus dealer and they will be able to say for certain if you have the tow package. If you have the original window sticker for the vehicle when you bought it should be listed there as well. Or you can look for the plug that the # 118252 would plug into on your vehicle and use a circuit tester like # PTW2993 to test to see if the pins of the connector are active. Check out the install video I attached to see how to find the plug. Otherwise...
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• Replacement 4-Way Flat Connector Needed for a 2004 Toyota Tacoma
  We do have a solution for you to install a new 4-Way flat connector on your 2004 Toyota Tacoma, but the Tekonsha T-One # 118252 that you referenced will only fit various Lexus RX year/models and is not compatible with your Tacoma. Instead what you will want to use the Tekonsha T-One # 118379 which is confirmed to fit your 2004 Tacoma. Since we do not have a wiring harness that connects to a factory plug on your 2004 Tacoma this is your best option. If you need a ned mounting bracket...
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• Does Wiring Harness 118252 fit a 2006 Toyota Tacoma
  There are wiring harnesses that will fit a 2006 Toyota Tacoma but the # 118252 will not. Instead, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118496. I have attached a link to a video review of this harness for you as well as a link to one being installed on an '06 Tacoma.
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• Recommended Trailer Hitch for a 2019 Lexus RX 350
  The trailer hitch I recommend for a 2019 Lexus RX 350 is the Curt Trailer Hitch Receiver part # C13272 which is a fit for all models even the F-Sport. The Curt hitch offers a complete bolt-on installation with no cutting or drilling required. Therefore, the Curt hitch is very easy to install and should only take around thirty minutes or so. The best part of all is that the Curt hitch has a hidden cross tube which you can see in the attached photo and this means that only the receiver tube...
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• How to Tell if a 2015 Lexus RX 350 Has the Tow Factory Package
  The Curt Trailer Hitch Receiver part # C13143 is an excellent option for your 2015 Lexus RX 350 and will work well for you. It has a Class III rating with a 2" receiver tube opening. It also comes with a limited lifetime warranty. I have attached an install video of this hitch as well. I recommend using a hitch cover like part # C22272 to protect the inside of the receiver tube from rusting while not in use. For a trailer wiring harness, I recommend using the T-One Vehicle Wiring Harness...
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