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Expert Answers about Custom Fit Vehicle Wiring


  • Fuse Locations for Towing on 2017 Ford Expedition
  • I took a look at the owner's manual for your 2017 Ford Expedition and in your engine compartment box fuse box the "Trailer brake" fuse is location 18, the "Trailer tow module" is location 21 and 48, and the "Trailer tow backup lamp" is number 31.
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  • Correct Wiring Kit for a 2019 Hyundai Santa Fe with the Trailer Tow Prep Package
  • If your 2019 Hyundai Santa Fe has the tow package then you want to use the Tekonsha T-One # 118784 which has the 4-Way Flat connector that you asked about and plugs into the factory connector which is located under the vehicle, behind the rear bumper, on the driver’s side. You said that you already have the trailer hitch for towing but you didn't mention a ball mount kit. If your trailer hitch has a 2" receiver like the Curt # C13195 which fits a 2019 Santa Fe then I recommend the Curt...
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  • Comparing the Tekonsha Wiring Harness Part # 119192 and Part # 119190KIT
  • The ModuLite Ultra Protector Wiring Harness part # 119192 is missing a few parts when compared to the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190KIT. The latter kit comes with a fuse holder, circuit tester, and 4-way trailer connector whereas the other does not. For your 2015 BMW X3 I highly recommend the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190KIT as you will need the circuit tester and trailer connector...
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  • Troubleshooting Trailer Wiring on 2008 Chevy Silverado 1500
  • It sounds like you have a short in your system if I am understanding you correctly. I recommend starting at your trailer connector and checking the wiring behind it for function using a circuit tester like # ALL640595. I've attached an article to help with the pin/function locations which will be consistent even if the color wire is not. If you have the wiring functions located where they are working, you can also determine which wires are not working and trace them back to where they...
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  • Installation of # HM11141835 Wiring Harness
  • The Hopkins trailer wiring harness, part # HM11141835, does not need a fuse for installation. It plugs directly into a connector near the truck's spare tire behind the rear bumper. I've linked the install details for you. The # HM11141835 harness fits the Toyota Tundra from 2010 to 2018.
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  • Recommended 7-Way Trailer Harness for 2018 Ford F-150
  • We have exactly what you need! For your 2018 Ford F-150 I recommend the Reese Multi-Plug Wiring Harness # 74682. This will give you a brand new 7-Way and 4-Way connector and it will plug right into the factory round US Car connector that you mentioned beneath the truck. I like this particular model because of its weathertight seal on the socket lid that will prevent water and debris from getting inside, leading to a longer-lasting connector. The mounting bracket is also included. I have...
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  • Does the Tekonsha T-One # 118449 Need to be Used for 2012 Toyota Highlander Without Front Converter
  • I'm glad that you like the etrailer.com Trailer Hitch Receiver # E98858 and Curt Class III Ball Mount Kit # C45036 that you purchased for your 2012 Toyota Highlander. When it comes to the Curt T-Connector # 56042 that you purchased, you can verify whether your Highlander is equipped with the tow package by contacting your local Toyota dealer with your VIN but the picture you sent in indicates that you don't have the tow package for your Highlander. If you find that your Highlander...
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  • How to Pick Out Trailer Wiring for 2018 Chevy Traverse
  • We have two options for trailer wiring for your 2018 Chevy Traverse. We have the 7-way kit part # 118287 and the 4-way part # 118761. Basically it comes down to what type of connector your trailer has for you to know which you'd need. If your trailer has a round plug for trailer wiring you'd want the part # 118287 or if instead it has a flat connector with 4 wires ran to it you'd want the 4-way part # 118761.
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  • OEM Tow Package Wiring Harness with 7-Way Connector for 2018 Honda Pilot
  • For your 2018 Honda Pilot, I recommend the T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # 118286. This harness will connect behind the rear bumper and the converter plugs into the factory wiring harness in your rear cargo area on the driver's side. The wiring includes all fuses needed to activate the tow package. Wiring also provides a connector for vehicles with the backup sensor that allows the sensor to continue working. It is a great option to...
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  • Troubleshooting Trailer Running Lights that Stop Working When Brake Pedal is Pressed on Tow Vehicle
  • Are the 2 new lights in addition to your current lights or were they used as direct replacements for other lights? If you added more lights to your trailer and you have a wiring kit like the T-One # 119190KIT on your tow vehicle then it sounds like the ModuLite box is being overloaded so it stops sending power to one function. To remedy this you will need to reduce the amount of lights on your trailer. If this is not the case then you most likely have a bad ground that is causing the...
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  • Recommended Trailer Wiring Harness for 2018 Toyota RAV4
  • For your 2018 Toyota RAV4 I recommend the Tekonsha T-One Vehicle Wiring Harness # 118578. This custom harness will plug right into factory ports behind the trim panels in the cargo area of your RAV4 to provide you with a 4-Way connector to power a trailer's basic signal lights. I recommend this particular harness because it features a higher maximum amperage for its circuits than the alternatives. We also get far fewer troubleshooting questions regarding Tekonsha harnesses than we do with...
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  • Recommended 7-Way Harness for 2018 Ford F-150
  • For your 2018 Ford F-150 you just need the Curt T-Connector Vehicle Wiring Harness # C55774. This custom harness will plug right into the round US car connector that you mentioned under your truck to provide you with a fully-functional 7-Way connector. A great thing about this particular unit is that it will also give you a 4-Way flat connector to use with trailers that are equipped with a 4-Way. Another plus for this harness is that it is made right here in the USA. I have attached...
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  • Recommended Trailer Hitch and Trailer Wiring for 2018 VW Golf SportWagen
  • The trailer wiring harness I recommend for your 2018 VW Golf SportWagen is the ZCI Wiring Harness # 119250KIT because it uses sensors which clamp onto your VW's wires to detect when the wires have current. What this means is that you do not have to cut or even splice into your Golf's wires when you are installing the harness, protecting them from any potential damage; you can see how it clamps on in the accompanying photo. For a trailer hitch that fits your '18 Golf SportWagen I...
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  • How to Wire a 7-Way Trailer Connector on a 2008 Dodge Ram 3500
  • I took a look in the owner's manual for your 2008 Dodge Ram 3500 and there was no mentioned of the wire colors for the trailer wiring. Therefore, in order to make sure the correct connections are made you need to test each of the wires for function with a circuit tester like part # ALL640595. To do this you will need to have a friend sit inside the vehicle and activate the signals while you test the wires at the rear to determine which wire is for which function. Once you determine this...
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  • Trailer Wiring Harness Recommendation for 2019 Honda Odyssey
  • There was a big enough change between the 2017 and 2018 Honda Odysseys that Tekonsha and the other trailer wiring manufacturers had to come up with a new design. That means that the kit you have from your 2015 model would not fit and you'd need the part # 118753 for your 2019 Odyssey. I attached an install video for this kit for you to check out on a similar 2018 model as well.
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  • Solution for Trailer Wiring Circuits Not Active on 2004 Dodge Ram
  • On a 2004 Dodge Ram the trailer wiring circuits are protected by the TIPM of the vehicle which can only be reset by a Dodge dealer. Problem is that it can only be reset so many times and after that requires an expensive replacement. That's why we recommend bypassing it with a hardwired trailer wiring harness like part # 119178KIT. Which you can then wire to the 7-way of the truck.
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  • Troubleshooting Trailer Turn Signals Not Working When Running Lights Are On
  • In many cases a bad ground is to blame for this type of issue, but in order to determine the specific problem you will need to use a circuit tester such as # ALL640595 to test the connector on your vehicle after disconnecting it from your trailer. Check the wiring going into your harness from your tail lights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring. If the signals going to your harness are okay, you'll need to test the...
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  • Parts Needed for Inherited 2010 Sierra to Tow Trailer with 7-Way Connector
  • We have everything you need to set your 2010 GMC Sierra up for towing your trailer that is equipped with a 7-Way connector and electric brakes. To start you will need to install a fully-functional 7-Way connector. There should be a bundle of factory wires above the spare tire of your Sierra. These wires can be used to install a 7-Way harness like the Pollak # PK11898. You will just need to connect the wiring from the 7-Way pigtail to the wiring on the truck, making sure to match them...
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  • Parts Needed to Install 7-Way Trailer Connector and Brake Controller in 2016 Toyota Sienna
  • You are correct that a 4-pole trailer wiring setup like # 118496 powers only lights and does not have the additional circuit needed for delivering brake power to engage electric trailer brakes. But we offer a complete conversion kit that allows you to upgrade your 4-pole to a 7-way and that is part # ETBC7. This kit does two things for you: it provides all the parts needed to convert your wiring to the 7-way, including the new connector, and it also allows you to complete the installation...
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  • Troubleshooting Trailer Wiring Installed on Vehicle that Prevents Blinkers from Working
  • Typically the issue you are having is just the connectors of the trailer wiring harness not making a solid connection. Disconnecting them and then reconnecting them typically clears out any issues but you might check the conditions of the pin to make sure a solid connection is being made. The converter box of the harness # C56348 does not affect the wiring of the vehicle so it most likely not be the issue.
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  • Troubleshooting "Check Trailer Brakes" Message on 2017 Dodge Ram 2500
  • Most likely you just need to clean the pins of your 7-ways and the error message will go away. It's very common for a bit of corrosion on the connectors to cause an intermittent trailer connection which is what is causing the error message you are seeing. I also attached a couple help articles on troubleshooting brake controllers and brake magnets if that does not take care of the problem.
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  • Troubleshooting Right Turn and Brake Lights Stopped Working on Trailer with Honda Pilot
  • There are a few possible reasons as to why you are no longer getting any power on the right turn/brake light circuit wire for the Curt Wiring Harness # C56170. You have at least ruled out the trailer wiring as the issue and can focus on your Honda Pilot. I first recommend simply inspecting the 4-Way pins at the rear of your Honda Pilot. Check the pins for any corrosion or debris that might be built up that would lead to a short, cleaning out as needed. If everything looks fine then...
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  • Troubleshooting Trailer Brakes Lock Up All the Time
  • If there was some type of issue with the part # 118266 it would have been located long ago as this part has been used for a number of years. Since you tested this on a different vehicle with the same trailer and it worked we can rule out the trailer wiring or brakes on the trailer being an issue but there are still a number of troubleshooting applications I recommend. Start by testing the brake controller by severing the blue wire a couple inches from the back of your controller....
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  • Comparing the Tekonsha Trailer Wiring Harness for 2018 Chrysler Pacifica # 118723 and # 118712
  • The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118723 is the custom fit for 2017 and 2018 Chrysler Pacifica Touring and LX models. The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118712 is the fit for 2017 and 2018 Chrysler Pacifica (excluding hybrid), Touring L Plus, Touring L, and Limited models. The connectors are different based on the trim models but it appears the modulite is the same amperage.
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  • What is Needed to Mount the 7- and 4-Pole Trailer Connector Socket Part # HM40975
  • I do not have any information on the factory trailer hitch for your 2014 Jeep Grand Cherokee but if you take a look at the attached photo, you can see a welded tab which will be used to mount a trailer connector like the 7- and 4-Pole Trailer Connector Socket part # HM40975. If you have this welded tab on your factory trailer hitch then you won't need anything else to mount a trailer connector but if you don't, you will also need to use the Curt No-Drill Bracket for 6-Way or 7-Way Round...
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  • Best 4-Pole Trailer Wiring Harness for 2003 Nissan Frontier
  • Thank you for the photo of your connector on your 2003 Frontier. It does indeed appear from your photo that the connectors on the Curt harness are not the same as yours. I also linked a photo of the Curt connectors. The similar Tekonsha harness # 118362 uses the same type of connectors as the Curt. It is possible that your photo shows another connector for a different function. If there are any other connectors on the frame rail you can check those to see if they match the Curt plugs....
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  • Troubleshooting Trailer Running Light Circuit Not Functioning on 2014 Honda Odyssey
  • Sounds like the trailer wiring issue you have for your 2014 Honda Odyssey is related to the tow package wiring setup of the vehicle. What I would recommend first is to check under the hood of your vehicle for the trailer running light circuit fuse and replace if needed as it sounds like possibly a blown fuse. We do have the part # 118521 though which will replace the converter box and wiring if the problem happens to be there insted. If the fuse you checked looks good and you still have...
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  • Does ZCI Trailer Wiring Harness Fit 2008 Range Rover Supercharged
  • Yes, the great thing about the ZCI trailer wiring harness part # 119250KIT that you mentioned is that it can basically fit all vehicles including your 2008 Range Rover.
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  • Does 5th Wheel/Gooseneck 7-Way Part # 54701-004 Really Fit 2008 Toyota Tundra
  • The installers you used are partially right in that normally the 7-way connectors that are square are typically seen on Dodge trucks. That said the # 54701-004 is the correct fit for your 2008 Toyota Tundra that has a factory 7-way at the rear of it. The square connectors of this are not the exact same as what Dodge trucks have.
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  • Do Owners Manuals Have Fuse Locations for Trailer Lights
  • Owner's manuals will usually have the locations of the fuses you need. I did check the online copy of your 2018 Ram 3500 and found that the Trailer Tow Right Turn / Stop Light fuse on your truck is in location F81, the location of which should be marked directly on the inside cover of your power distribution box.
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  • Wiring Kit to Add 4-Way Connector to a 2006 Toyota Highlander
  • We do have wiring kits to add a 4-Way connector on your 2006 Toyota Highlander Hybrid that doesn't have the tow package. If you are wanting a kit that plugs in behind the tail lights like the Curt T-Connector # C55400 that you referenced, there are none that connect that way as they involved splicing the wiring in. Out of our available selection I recommend using the Tekonsha # 119179KIT as we have found that Tekonsha has the most reliable wiring kits. This includes a protected ModuLite...
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  • Trailer Wiring Harness for 2005 Nissan Titan and Brake Controller
  • On your 2005 Nissan Titan if you have the factory 7-way, you should have been able to simply install the Factory Style 7-Way and 4-Way Flat Vehicle End Trailer Connector # N40975 and then add the brake controller wiring harness # 3050-P and brake controller like # 90195. I've attached some videos to assist. If you didn't have the factory 7-way, then you need a powered converter like # 119147KIT to give you a 4-way and then the # ETBC7 Kit to help finish your hardwiring. I don't believe...
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  • Is a 10 amp Mini Low Profile Fuse Included with the Curt T-Connector # C56158
  • Yes, there are 2 fuses that come with the Curt T-Connector # C56158 for a 2012 - 2016 Honda CR-V. The larger fuse is placed in the red fuse holder while the smaller 10 amp low profile mini fuse is placed into the fuse panel in position 10 (which you see in the provided picture). If you purchased the unit through us please let me know. Otherwise, you should be able to acquire one of these fuses at your local hardware, home improvement, or auto parts store.
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  • Fuse Location for Installing Trailer Wiring on a 2018 Honda Pilot
  • I would be glad to help! When installing the Curt T-Connector # C56291 on your 2018 Honda Pilot, it looks like the location for the included fuse is the number 2 location in the fuse box that is located near the brake fluid reservoir (near the driver's side under your hood). If you check out the linked installation video on a 2017 Pilot you can see this being done. If you don't already have a trailer hitch and a hitch ball kit then I recommend the etrailer.com Trailer Hitch Receiver...
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  • Can 5th Wheel Trailer Wiring Be Connected To Bumper or Only 7-Way In-Bed Connection?
  • You can definitely connect a 5th wheel wiring harness to the bumper 7-way on your truck. The second in-bed 7-way connection is simply to give an easy access point and clean look. It keeps the wiring from dragging or moving against your tailgate, so some people prefer the second 7-way as a solution for that. If you choose to add the second 7-way like # 20110 to give you two functional connections, a 5th wheel hitch installer can absolutely add that at the same time as installing a hitch...
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  • Troubleshooting Trailer Wiring Not Working with 2015 VW Tiguan
  • Since you installed the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118675 exactly as shown in the attached videos, I recommend testing the trailer functions at the 4-way without the trailer connected using a circuit tester like # ALL640595. I've attached a video to assist. If you are not getting the functions, I recommend first checking your ground connection to ensure you are getting a good ground. Often when one function works and others do not or if one function...
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  • 7-Way and 4-Way Recommendation for 2018 Ford F-150
  • For your 2018 Ford F-150 we have the Reese 7-way part # 74682 which is a confirmed fit as a replacement 7-way for your truck. It also has a 4-way attached to the side of the 7-way for you to use as well. This will plug right into the same connector as your factory 7-way.
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  • Which Tekonsha Trailer Wiring Kit Fits 2002 2002 Mercedes E320
  • The taillight configuration of your 2002 Mercedes E320 has separate wiring. The brake and turn signals are sent along separate wires. You don't have BT or BTT designations which refer to multiplex style wiring so the # 119147KIT would work well.
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  • Troubleshooting Running Light Circuit of Curt Trailer Wiring # C56673 Not Functioning
  • Have you tried swapping the relays around that you installed with the harness? Easiest way to determine if a relay is blown is to replace it with a known working one. A short on your trailer wiring could have possibly damaged it or it was defective. If you wanted to bypass the factory tow package wiring you could also install the # 118385 which would work well and give you all functions needed.
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  • 4-Way Trailer Wiring Harness Recommendation for 2018 Honda CR-V
  • The Tekonsha harness part # 118741 that you referenced is a fit for the AWD and FWD versions of the 2018 Honda CR-V. I attached a link to an install video for this kit on a 2018 CR-V for you to check out as well.
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  • 7-Way Adapter Recommendation for 2007 Chevy Silverado to Install in Bed of Truck
  • What you'll want is the adapter kit part # 41157. This plugs inline with the 7-way at the rear of your 2007 Chevy Silverado and gives you an additional 7-way you can mount up in the truck bed for your camper.
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  • 4-Way to 5-Way Adapter for 2013 Chevy Malibu
  • The adapter you need is the part # 20036 which will convert your vehicle's 4-way to a 5-way. The 5th pin will get ran to the reverse light circuit of your vehicle.
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  • Where is Brake Controller Install Port for 2018 Ford Explorer
  • To install your Reese Pod brake controller in your 2018 Ford Explorer will require the install harness part # 3035-P which is a confirmed fit. If you check out the 9:55 mark of the install video I attached to this page you'll see where to find the port on your vehicle to plug the controller in. It is a bit hidden under the dash underneath the panels.
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  • Tow Bar Wiring Recommendation for 2016 Hyundai Veloster
  • Since trailer wiring is not reversible to allow it to be used in a flat towing setup you'd have to go with tow bar wiring that does fit your 2016 Hyundai Veloster. For lighting you can use the diode kit, # RM-15267, and not have to worry about cutting into the taillight housing. This will splice into your taillight wiring to allow your tow vehicle to control the taillight assemblies of the towed vehicle. This comes with a round 6-way connector that you will install on the front of your...
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  • Recommended Brake Controller and Parts Needed to Add 7-Way to 2000 Jeep Cherokee
  • You can install a 7-way in your 2000 Jeep Cherokee but there is no plug-in harness for this vehicle, you are going to need to add a number of parts. First you need to add a 4-way, the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118354 and I have linked a video so you can see how this installs on a '00 Jeep Cherokee. From there you are going to need the Universal Installation Kit for Trailer Brake Controller # ETBC7, which will give you a 7- and 4-way adapter...
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  • Recommended Trailer Wiring Harness for 2018 Toyota Highlander XLE
  • You should be able to call your local Toyota Dealer with your VIN number to determine if you have the factory tow package or not. It is likely you do with the transmission cooler, but there are times they include one and not the other. If you have the factory tow package with the converter under your dash, you will simply need the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # 56042 for your trailer wiring. If you do not have...
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  • Adapter to Connect 4-Way on Car to 7-Way on Trailer
  • There is an adapter available for the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # HM43125 that fits your 2013 Honda Ridgeline. All you need is the Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717; you can just plug this into the 4-way and tie off the additional wires you are not using. I strongly recommend using Dielectric Grease # LT37534 to help stop any corrosion between the two connectors. You will also want to use Mounting...
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  • 2006 Jeep Commander Trailer Hitch, Brake Controller, and Weight Distribution Recommendation
  • On your 2006 Jeep Commander you will need to start with a 4-way (if you do not have one). For that you would want the # 118408. From there you would need to convert the 4-way to a 7-way so that you can install the brake controller. For that you will want the Brake Controller Install Kit and 7-Way Adapter part # ETBC7. I attached installation instructions and an install video for this product as well. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885....
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  • Troubleshooting Loss of Trailer Brakes Around Slight Corners
  • Did you go with a longer wire when you replaced the wiring on the camper? It sounds like around corners the connector partially unseats. It's actually amazing it doesn't totally pull the plug out. Other possibilities is that around corners the axle and suspension happen to move just enough to short out the trailer wiring if there's exposed wire on that circuit. Only way to track that down will be to go over all of the wiring of the circuit till you find the esposed wire and fix as needed.
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  • How to Activate 12V Power Pin on a 2011 GMC Sierra 7-Way Connector
  • Yes, if you are looking to activate the 12V power function on your 7-Way connector, like the part # PK11916, then you may need to connect the 12V power wire to the front of the power distribution box. If you check out the attached photo you can see that it should be taped up to a wire harness under the power brake booster. The fuse will also need to be connected in the power distribution box but by the sounds of it you have already made this connection. I have attached a helpful...
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  • Which Trailer Wiring Harness is Correct for a 2018 Chevrolet Equinox LT
  • If you do not have the factory tow package on your 2018 Chevrolet Equinox LT then the correct trailer wiring harness for you is the T-One Vehicle Wiring Harness part # 118750, not the T-One Vehicle Wiring Harness part # 118285. The T-One Vehicle Wiring Harness part # 118285 is only for model equipped with the factory tow package. There will still be a plug for the latter harness but if you do not have the factory tow package then the circuits may not all be ran to the power distribution...
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  • Can Trailer Wiring Touch Heat Shield of Exhaust Near Rear of Vehicle
  • Exhaust heat shields that are at the rear of a vehicles exhaust system would not get hot enough to melt wire or be an issue. Your 4-way wiring contacting the heat shield there would not be an issue.
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  • How to Install Wiring Harness 118496 in 1995 Toyota T100
  • The installation of a 4-flat connector such as the T-One Vehicle Wiring Harness # 118496 in your 1995 Toyota T100 is a very simple and straightforward process; it only requires plugging in the T-connectors at the taillight wiring harness. I was unable to locate what harness you ordered from us so I'm not certain what exact harness you used but the process should not be any different (see linked installation video which shows how this harness installs). If you only cut off the connector...
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  • Where to Find Connector to Install Trailer Wiring for 2012 Ford Escape
  • If your 2012 Ford Escape had the factory tow package the correct trailer wiring harness would be the # 118251. The connection point is behind the rear bumper on the driver's side of the vehicle. I attached a picture I took from the install instructions for this kit for you to check out as well.
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  • Replacement for Factory 7-Way Trailer Connector on 2001 GMC Sierra 2500HD
  • To replace the 7-way on your 2001 GMC Sierra 2500HD I recommend the Reese Multi-Plug Wiring Harness for Factory Tow Package # 74682 because it is an easy plug-in design. All you need to do is plug it into the 7-way socket on your truck and it will work as a replacement. For a trailer connector I recommend the Hopkins 7-Way RV Style Connector with Molded Cable # H20046 which is 8 feet long. If you want something shorter there is also the 6 foot # H20044 or 4 foot # H20043. I have added...
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  • Recommended Trailer Wiring Harness for 1999 Ford F-150 or F-250 Light Duty Truck
  • The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # C55242 will allow you to use the Mighty Cord 5th Wheel/Gooseneck Wiring Harness w/ 7-Pole Connector - 7' Long # A10-7007 to give you the connection at the bumper and another in the bed of your Ford truck. They will work together well and can be used independently or at the same time.
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  • Troubleshooting Trailer Wiring 2011 Mercedes GL350 Converted to LED No Brake Lights
  • Since we aren't totally sure if the issue you have is due to your vehicle not wanting to work with LED lights or if it's due to the trailer wiring having a problem let's first determine which issue is at fault. Using a 12 volt jumper wire from a source like a vehicle battery's positive post try jumping the voltage to each of the stop/turn circuits to see if you can get the brighter illumination to come on. If so then the problem is that your Mercedes doesn't like the LED Lights and you'd...
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  • Recommended 4-Flat Wiring Harness for 2016 Ford Explorer
  • I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118540 for your 2016 Ford Explorer because of the reliability of the Tekonsha wiring products. You are correct that tit is just a plug-in operation although both ends of the connector must be plugged in at the point you mentioned. I have linked installation videos of both the Tekonsha I recommended as well as the Curt # C56172 being installed on a 2016 Ford Explorer so you can see for yourself the exact...
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  • Towing Capacity for a 2017 Dodge Durango with RWD
  • I took a look at the online version of the owner's manual for a 2017 Dodge Durango and if your RWD model has the 3.6L with a GCWR of 8,900 lbs (found on the sticker of your driver's door jamb) then your towing capacity is 3,500 lbs. If the GCWR is 11,600 lbs then the capacity is 6,200 lbs. If you have the 5.7L RWD then your capacity is actually 7,400 lbs. You will want to check your owner's manual to confirm these ratings and then keep in mind that if your trailer hitch has a different...
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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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  • What is the Wire Size for the 12 Volt Circuit on a 7-Way Trailer Connector
  • For vehicles with 7-Way trailer connectors the 12 volt circuit is usually 12 to 10 gauge but I cannot say for sure what it is on a 2001 Chevy Silverado. Aftermarket 7-Ways generally use 12 gauge. What is the amperage draw of the pump? The factory tow package wiring 12 volt circuit uses stud 1 under the hood at the power distribution box. You can check it to see what the fuse associated with that stud is rated for to make sure the factory wiring has the capacity to handle the pump's power...
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  • Hitch and Trailer Wiring Part Numbers That Fit 2019 Hyundai Santa Fe and Santa Fe XL
  • If you have a 2019 Hyundai Santa Fe the correct hitch is the part # C13195. If instead you had the XL Santa Fe the hitch you'd need is the # C13153. I confirmed this with Curt. The trailer wiring part # 118269 fits the XL 2019 Santa Fe and then for the non-XL model you'd have to go with a universal style harness like the ZCI kit part # 119250KIT as a custom fit model hasn't been released (as of Ocotober 2018). I hope this clears up which part numbers you need!
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  • Recommended Trailer Wiring Harness for a 2018 Ford Escape Without Factory Tow Package
  • For your 2018 Ford Escape without factory tow package I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118715 because Tekonsha has a better reputation with customers for their wiring harnesses over the competition. This harness will simply plug into the factory wiring connections behind your tail lights. Once installed you then will run the included power wire up to the battery. I've attached an installation video to assist as well as an article to help...
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  • Recommended 7-Way Trailer Wiring Harness for 2018 Honda Pilot
  • For your 2018 Honda Pilot I recommend the Tekonsha T-One Vehicle Wiring Harness # 118286. This custom harness is confirmed to fit your Pilot and will plug right into the factory port behind the driver side trim panel to provide you with a fully-functional 7-Way connector. This is the only "plug-and-play" 7-Way harness available for your Pilot. The harness includes all the fuses to activate the tow package if needed. This means that it will work perfectly for your Pilot whether or not it...
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  • Replacement 7-Way/4-Way Connector for OEM Connector on a 2018 Toyota Tundra
  • That is a sad story but we do have exactly what you need to make it not so sad. The Hopkins 7- and 4-Pole Trailer Connector Socket # HM40975 is an exact replacement for the 7-Way/4-Way connector on your 2018 Toyota Tundra and matches up with the US Car Connector on the back side of your OEM connector. I attached an installation video of this on a 2015 Chevy Colorado for you to reference. I do recommend hitting the gym a little less often so as to protect this connector.
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  • Trailer Wiring Compatibility with 2016 Ford Explorer Police Interceptor
  • We install harnesses on many vehicles like the park ranger you mentioned and we have not seen any differences with the wiring harnesses on these Explorer models. I reached out to my tech contact at Tekonsha and he said that it is possible you are trying to connect the harness # 118540 to the incorrect connector because there are two that are very similar on the interceptors. He said there is a black connector and a gray connector that look very similar. The black connector is the...
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  • Wiring Harness Compatible with 2018 Jeep Wrangler JL Unlimited Sahara
  • The T-One Vehicle Wiring Harness #118782 is not a fit for the Sahara or Rubicon models and has been discontinued. Instead you will want the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118786. This harness is the updated replacement for the previous harness that is compatible with your 2018 Jeep Wrangler JL Unlimited Sahara. This harness will install behind the driver's-side and passenger side tail lights. Once you've plugged in the harness, you will run the hot...
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  • Why Do Some Trailer Wiring Harnesses Have Wire that Runs to Vehicle Battery
  • Not all vehicles can handle the additional amperage draw of the trailer taillights on the vehicle taillight circuits. Those vehicles need setup that draws power from the battery. Some vehicles have higher rated circuits that can handle this, and others need to have the power drawn straight from the battery to protect the taillight circuits. So the connection has to be made to the vehicle battery otherwise the harness will not work. That said, if you have a 2005 Toyota Matrix like you...
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  • Troubleshooting T-One # 118265 on a 2015 Honda Pilot and Running/Tail Light Fuse Keeps Blowing
  • It could be that the T-One Vehicle Wiring Harness # 118265 has gone bad, but what you are describing sounds like a short on the running/tail light circuit so it would be worth doing some digging before replacing the whole wiring harness. Start off by making sure that both the T-One 7-Way and the connectors on your trailers are clean and clear of any debris or corrosion. Next you will want to check your wiring for that running/tail light circuit. It is possible but very unlikely that...
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  • Wiring to Activate Boat Trailer Brakes for a 2015 Ford Edge SEL
  • If you only have a 4-Way on your 2015 Ford Edge SEL, like the Curt # C56272 or Tekonsha # 118669, then the wiring that you need is the Kit # ETBC7. This connects to your 4-Way and provides both 4-Way and 7-Way connectors that are fully functioning. You will need a brake controller to send a signal back to the brakes on your boat trailer. We actually have an installation video of the ETBC7 kit and the popular Prodigy P3 # 90195 brake controller being installed on a 2016 Ford Edge that...
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  • Park Sensor Warning Message on a 2018 Ram ProMaster City While Reversing with Trailer
  • I took a look in the owner's manual for your 2018 Ram ProMaster City and did not see any way to manually disable the ParkSense. More often than not, you can disable the parking sensors in the information panel on your cluster but I was not able to confirm this for your Ram ProMaster City. The sensors are supposed to automatically deactivate when the transmission is placed in reverse with a trailer connected but this is for Mopar wiring harnesses only. You can try turning the key ignition...
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  • No Trailer Lights on a 2018 Honda Pilot with Tekonsha 7-Way Harness Part # 118760
  • What type of tester are you using? If it is one like the Curt LED 4-Way Flat Connector part # I26 then that may be part of the problem as these are not foolproof and do not always work with all wiring harnesses. Therefore, I would check each of the pins with an actual circuit tester like part # ALL640595 while the respective signals are active. These are much more accurate than the above testers. In regards to the T-One Vehicle Wiring Harness part # 118760 which is a fit for your 2018...
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  • Best Wiring Option for Towing 5th Wheel Trailer With 2019 Chevy Silverado 3500
  • The best option to add a wiring harness to your 2019 Chevy Silverado 3500 to tow your fifth wheel trailer is the Bargman # 50-97-410 5th Wheel/Gooseneck 90-Degree Wiring Harness. This harness, which does require your Silverado have a factory 7-way, is the best way to go because it is 9' long which will easily cover the distance from your rear bumper to your truck bed and the connector that fits your truck bed is angled at 90 degrees so it will fit nicely in your Silverado's side rails....
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  • Adding a 7-Way and Brake Controller to a 2012 Ford Van with Factory Tow Package Connectors
  • Trailer wiring harness # 118261 will certainly plug into the connectors you found at the back of your 2012 Ford Van and the 7-Way connector pictured is included. However, if the van did not come with a factory 7-Way then it is possible that some or all of the circuits are not active on the factory harness. You can use a circuit tester such as # ALL640595 to test the vehicle side connectors to see if they have power when the various lighting functions are used. There may also be 1 pin that...
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  • Replacement 7-Way Recommendation for 2018 Ford F-150 that Also has 4-Way
  • For your 2018 Ford F-150 that has a factory 7-way we have the Reese Multi Plug Harness part # 74682 which will replace your current 7-way and give you one that also has a 4-way harness attached to it. This will allow you to tow trailers with both styles of trailer wiring. It also comes with a new mounting bracket if you needed that as well.
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  • Brake Controller and 7-Way Recommendation for 2019 Jeep Wrangler Unlimited
  • To install a 7-way and brake controller in your 2019 Jeep Wrangler Unlimited first requires you to install a 4-way connector part # 118782 which provides all of the trailer lighting functions and then convert to a 7-way with the part # ETBC7 which the 4-way plugs into and comes with everything needed to wire up a brake controller. I attached an install video for this kit on a similar 2012 Jeep Wrangler Unlimited as yours for you to check out as well. For a brake controller I would recommend...
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  • 2018 Jeep Wrangler Unlimited Trailer Wiring Recommendation
  • If your 2018 Jeep Wrangler JK has the factory tow package it would have a square connector at the rear of it for attaching trailer wiring to. For that we have the Pollak 7 and 4-way kit part # HM40975-11933 which will plug right in and be functional. The 4-way kit part # 118416 that you referenced is for versions of the vehicle that do not have the tow package, but it can fit on either style of vehicle as it installs by plugging in line with the taillight connectors on the vehicle.
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  • Troubleshooting Trailer Wiring When Plugged In Reverse Lights on Trailer Come On
  • That means you have a short between the reverse light circuit of your trailer wiring and the running light circuit. On a 7-way the pin locations for these circuits are 1:00 for the running light (on the vehicle side) and center pin for the reverse light circuit. Check over the connectors and wiring looking for any loose wiring or corrosion and fix as needed. I attached a link to a page that has trailer wiring diagrams for you to check out as well.
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  • Where Do the Trailer Fuses Install on a 2008 Nissan Xterra
  • The T-One Vehicle Wiring Harness part # 118266 which is a fit for your 2008 Nissan Xterra comes with two wiring harnesses and three fuses/relays. The wiring harness with the trailer connector will install in tow plug located near the driver’s side rear tire (see photo 1). You will then need to insert the fuses and relays into the other wiring harness and install that in a tow plug under the passenger side kick panel (see photo 2). There will not be any addational fuses to install once the...
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  • Recommended Trailer Wiring and Hitch for 2007 Jeep Commander Sport Rocky Mountain Edition
  • The Tekonsha T-One Vehicle Wiring Harness # 118408 referenced in your question is confirmed to fit your 2007 Jeep Commander Sport Rocky Mountain Edition. There is not a fit exclusion with this particular trim package. The harness will work perfectly. It will install by plugging into factory ports behind the driver and passenger side tail lights to provide you with a 4-Way connector to power a trailer's basic signal lights. I have attached an installation video that you can use for reference. If...
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  • How to Combine Stop and Turn Signal Wires Together on a Tow Vehicle
  • Yes, in order to combined the brake and turn signal wires together on a tow vehicle I recommend using the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness part # 119190. In order to mount the trailer connector you can use part # 18144. I have attached the written instructions of the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness for you as well.
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  • Wire Color Chart Diagram for Installing Hopkins Multi-Tow 7-Way Blade and 4-Way # HM11141144
  • I attached a diagram that shows how to match all of the wire colors of the Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector # HM11141144 to the wire colors on your 2017 GMC Canyon.
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  • Reliable Trailer Wiring Recommendation for 2004 Toyota Highlander
  • Based on the troubleshooting you've done so far you have a shorted out converter box of your trailer wiring harness. The only solution in this scenario is a new harness. For that the Tekonsha brand like part # 118413 is our most reliable option so it would be what we recommend for your 2004 Toyota Highlander. I checked our order notes and was not able to find you in our system also. Based on that I don't believe you bought the kit from us.
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  • Testing Tail Light Wires to Install ZCI Trailer Wiring Harness on a 2018 Volkswagen Golf Alltrack
  • While I do not know the wire colors/functions on your 2018 Volkswagen Golf Alltrack I can tell you how to figure it out. Use the included circuit tester that came with the ZCI harness # 119250KIT or if you need one you can get # ALL640595 to test the tail light wires while someone sits in the vehicle and goes through the various light functions. If there is one wire that has brake lights, tail lights, and turn signals on it then you only use one connector per side on the ZCI harness....
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  • Trailer Brake Lights Not Working when Connected to a 2006 Toyota Sienna
  • You can test trailer wiring harness # 118304 to determine if it is the problem or if the issue is somewhere else. You can use a circuit tester such as # ALL640595 or a meter if you have one to perform this test. Have someone sit in the vehicle and press the brake pedal. At the same time test the pins on the 4-Way, specifically the 2 that are the furthest from the exposed ground pin. If you are not getting power there when the brake pedal is pressed then make sure your stoplight/CHMSL...
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  • Trailer Wiring Harness for 1996 Jeep Grand Cherokee
  • The Hopkins # HM48895 is intended for use with vehicles that have LED tail lights and is not the recommended harness for your 1996 Jeep Grand Cherokee. There are 4-way harnesses with converters that will fit your '96 Grand Cherokee that I recommend using: the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118349 if your Jeep does NOT have the factory tow package or the Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector #...
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  • Recommended Trailer Wiring Harness for 2005 Mazda Tribute
  • For your 2005 Mazda Tribute I recommend the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118426. This harness will plug into your Mazda Tribute's wiring harness, which is located behind the driver's-side and passenger's-side tail lights just like the Ford Escape video attached. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive...
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  • How to Install a 7-Way on a 2011 Honda CR-V for Charging a Trailer Battery
  • Absolutely! For your 2011 Honda CR-V I first recommend installing the T-One Vehicle Wiring Harness part # 118427 which is completely plug and play. You can see this process in the attached install video. Then in order to convert this 4-way into a 7-way I recommend using the Adapter 4-Pole to 7-Pole and 4-Pole part # 37185 because it has a mounting bracket and both 4 and 7-way trailer connection points. The only two wires you will want to attach on the 4 to 7-way adapter is the ground...
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  • How Many Volts Should Each Pin of 4-Way Get?
  • On a 4-way connector such as the T-One Vehicle Wiring Harness # 118412 that fits your 2009 Toyota RAV4 each of the pins - end of the wires - should be getting 12 volts (except for the ground wire, of course). Since you mentioned corrosion I highly recommend using Dielectric Grease # LT37534 on your connector to help stop any future corrosion. I've added links to a pair of help articles on trailer wiring that you may also find useful.
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  • Parts Needed to Add Brake Controller to 1997 Ford F-150 With Factory 4-Flat
  • Since your 1997 Ford F-150 already has a factory 4-way the only part you will need in order to add a brake controller are the Ford Replacement OEM Tow Package Wiring Harness, 7-Way # 118242 which will upgrade your truck to a 7-way. I have added a photo showing you where the plug normally is on your truck - on the driver's side between the back tires and the end of the truck bed. For a brake controller I strongly recommend the Prodigy P3 # 90195 which you can plug in with Tekonsha Plug-In...
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  • Troubleshooting Trailer Wiring that All Flashes with Right Blinker
  • I believe you are correct and the issue is that you have a short in the right turn signal wiring that is most likely shorting to the running light circuit. I think running a jumper wire from the trailer connector direclty to the taillight assembly will be your best move at this point to confirm this. If this fixes the problem one solution would be to just run an all new wire for the circuit so that you don't have to trace the hard to find wiring in your camper walls.
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  • Troubleshooting Right Turn Signal of Trailer Wiring Not Functioning
  • Have you tested the pin with the green wire leading to it with a circuit tester like part # ALL640595 to see if there is voltage there when the right blinker is on? If the right stop light is working but not the blinker on the trailer it's most likely the fault of # C56012. Typically it's a bad fuse or relay that causes this but sometimes it can be that the trailer wiring connector isn't making full contact.
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  • 7-Way Trailer Wiring Recommendation for 2019 Honda Ridgeline
  • If you are looking for a 7-way trailer wiring connector for the rear of your 2019 Honda Ridgeline the correct part number is # 118288 which comes with everything needed to install on your vehicle. The # C56584 is a kit designed to plug inline with 7-way to provide a 5-way.
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  • Recommended Trailer Wiring Harness Kit for a 2018 Honda Pilot
  • For your 2018 Honda Pilot, we have a couple different options. If you want a simple 4-way trailer connection I recommend the Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # 118760. This harness plugs into your factory wiring harness located in your rear cargo area on the driver's side. You will route the harness through the jack storage compartment to the center of your Pilot and then insert the provided fuses in the fuse box in your engine...
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  • Best Trailer Wiring Harness for 2018 Hyundai Elantra With or Without LED Tail Lights
  • The 2018 Hyundai Elantra Limited version is the only one with LED lights and it has the trim features of chrome door handles, heated rear seats and the 8 inch touch screen navigation system. The only thing that changes anything for the trailer wiring is the LED lighting because the wiring doesn't have the same amount of power required or supplied. If you have the LED lights, I recommend the wiring harness # 118711. If you have the incandescent bulb tail lights, I recommend the...
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  • Does 4-Way on 2011 Nissan Rogue Have to Hang Out of Rear Hatch
  • You can install the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56033 or T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118480 on your 2011 Nissan Rogue so the connector goes under the vehicle body instead of hanging out the rear hatch. Since the harness does plug in behind the taillights (see accompanying photo) on your Rogue many people store it there for simplicity because you will need to find a way to route the actual connector...
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  • Parts Needed to Add 7-Way to 2018 Mercedes-Benz Sprinter 2500
  • To add a 7-way to your 2018 Mercedes-Benz Sprinter 2500 you need to first add a 4-way with Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT. From there you are going to need to add the Universal Installation Kit for Trailer Brake Controller # ETBC7, which will give you the 7-way with the 7- and 4-way trailer connector adapter along with the circuit breakers and the rest of the hardware needed to install a brake controller.
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  • Trailer Wiring Harness That Fits 2018 Dodge Durango Without Factory Tow Package
  • The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118617 is exactly what you need to add a 4-way to your 2018 Dodge Durango that does not have the factory tow package. This connector will only require you plug in its connectors behind your tail lights and run a hot lead to your battery. I have added a link to an installation video of this harness on a Durango so you can check out the process.
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  • Parts to Connect Vehicle 4-Pole and Trailer 7-Way and to Install Brake Controller in 2006 Ford Van
  • When you use an adapter to join a vehicle's 4-pole wiring to a trailer's 7-way wiring, an item like # 37185, only the basic lighting functions from the 4-pole setup will reach the trailer unless you make more circuit connections. Those additional functions are trailer brakes, reverse lights and 12V trailer power. Those extra circuit connections can be seen in the linked photo of 37185 which has pigtail leads for making those three additional functions. If you already have a 4-pole harness...
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  • Parts Needed to Convert 4-Way of 2018 Honda Odyssey to 7-Way
  • You'll need to look for a grommet or hole in the floor of the rear cargo area of your vehicle to permanently mount the connector underneath it. We haven't done this on a vehicle like your 2018 Odyssey but I am sure there's a grommet or hole in the floor board you could use. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and...
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