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2008 Ford F-150
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Ford Replacement OEM Tow Package Wiring Harness, 7-Way

Item # 118242
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2008 Ford F-150

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Custom Fit Vehicle Wiring 118242 - 7 Blade - Tekonsha
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The best technical support and full custom fit vehicle wiring installation instructions. Lowest price F-150 custom fit vehicle wiring guarantee and expert service. Ford F-150, 2008 custom fit vehicle wiring by Tekonsha are available from etrailer.com. For expert service call 800-298-8924 to order your Ford Replacement OEM Tow Package Wiring Harness, 7-Way part number 118242, or order online at etrailer.com.
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Ford F-150 - Ford Replacement OEM Tow Package Wiring Harness, 7-Way

  • Custom Fit
  • Trailer Hitch Wiring
  • Tekonsha
  • 7 Blade
  • No Converter


  • Exact Replacement for Damaged OEM Wiring Harness
  • Installs in Seconds on Vehicles not Factory Pre-Wired
  • Upgrades Vehicles From 4-Flat OEM Wiring to 7-Way Connectors
  • Connects Directly to Standard OEM Connector
  • Fits mounting bracket PK-12711U (sold separately)
  • Fuses and Relays Included
  • Can only be used with a factory 4-pole harness
    • This will not work with a factory 7-pole harness


Product detail

Picture of OEM Connector. The plug is usually located on the driver's side between the back tires and the end of the truck bed.


Product detail

Picture of the 7-Way Connector



118242 Ford Replacement OEM Tow Package Wiring Harness, 7-Way

Installation Details 118242 Installation instructions

California residents: click here


Video of Ford Replacement OEM Tow Package Wiring Harness, 7-Way

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




Video Transcript for Tow Ready Tow Package Wiring Harness Installation - 2002 Ford F-150

Today, our 2002 Ford F150 SuperCrew Cab, we're going to install part number 118242. This is a Ford replacement OEM tow-package wiring harness. Now, what this will do, it will upgrade your preexisting 4-pole harness on tow package up to a 7-pole. Now, our new upgrade harness will actually work with a factory 4-pole wire harness. In this case we don't have our 4-pole anymore, so that's why we're upgrade. Our connection point is right here on the frame rail on the driver's side.

Yes, you definitely want to take the spare tire out of the way so you can see what's going on. This is our connection point and this is our ground. We're going to have to take apart the ground and our connection point. Then we'll go ahead and move this off the frame rail. A small pry bar or trim panel tool will work to get the classic part off here; we'll have easier access to our wire harness. Now, we need to take this apart, push down on this tab, and pull it apart.

Then we can go ahead and start to install our new parts. We've got our new wire harness and basically T into the middle of these two connectors; push them together until they click. Then, we'll go ahead and install our white wire at the ring terminal with the original one and original screw back into the frame. We'll snap this back into its original place, a little push fastener. I'm going to take the indirect cable; it'll go towards our bumper. I like to route it over the frame, back down to the bumper.

Now, at this point it's personal preference how you route your wire harness to the eventual location of your 7-pole connector. Let's go ahead and use a zip tie to help contain our wires, keep them safe and secure. Now, the kit doesn't come with many zip ties, so you may want to go get yourself some. Now, this is our 7-pole connector that'll eventually plug into the back of our wire harness here. This is like Ford factory.

To do that, I will now mount a couple of brackets to hold our 7-pole in place. Now, the bracket we're going to install is part number 18140 from Tow Ready. This is their universal mounting bracket. This bracket is going to attach to the bottom of our hitch and use this clamp to hold it in place. Now you take the screw and a clamp and bend it out of the way to make it easier to run the clamp through and then push it back up. Then use a 5/16ths nut driver to tighten it up. I'm just going to bend that guy up and out of the way for the excess. Now, the bracket we're going to use to hold our 7-pole connector up will be part number PK12711U. This is a mounting bracket for 7-pole connectors from Pollak. Also, we're going to need some hardware to do this. This will be hardware installation kit PK11926. Now to make our connection we're going to use the parts that came with our first bracket to attach these two. Our hardware kit will work with the 7-pole connector itself. A number two Phillips screwdriver will work to tighten down our hardware. Let's go ahead and mount our 7-pole connector, using the hardware kit for 7-pole bracket; flat blade screwdriver for these screws. Then, we can go ahead and plug our wire harness into our 7-pole connector. Now on this connector here, it's a good idea to use some dielectric grease. We'll be using part number 11755 from Lubrimatic. Push these two together until they click and there's also a small grey lock that goes on the end here. Now, typically this piece is already installed on here, but you might want to take it off before you do your installation to make it easier to snap together. So, to take it off, you just push down right here with a really small screwdriver. Push down in the middle and then remove it. When we need to use it, we just line it up and push it into place. All right, next we'll get underneath the hood of the truck and we'll go to the fuse panel here. We'll open it up, take the lid off. There's a couple of relays and fuses that we have to install. At this point, you definitely want to go by the owner's manual and find the locations for your fuses. Now, a lot of times the relays and fuses are already installed onto your truck. So, it's just basically you got to just investigate and see what you need and what you don't need. Now, in our particular truck, we only had to install the backup relay, which is located right here. On our battery charge circuit for our trailer, the relay goes right there. Everything else is already installed on the truck. The fuses that came with the kit, we couldn't use in this one because they're already fuses in the areas of the fuse box of our truck. So, we are done. We have everything in place it's a good idea to test it out with a tester before you try it on a trailer. With that, that'll finish it for our install, part number 118242 full replacement OEM tow-package wiring harness on our 2002 Ford F150 SuperCrew Cab. .


Customer Reviews

Ford Replacement OEM Tow Package Wiring Harness, 7-Way - 118242

Average Customer Rating:  4.8 out of 5 stars   (222 Customer Reviews)


- 118242
by:
2003 Ford F-150

My F150 had an OEM 4 pin trailer plug and hitch. The 118242 - 7 pin connector with wiring harness is the ticket. The hardest part of the install was dropping the spare tire. The plugs connect directly to the factory plugs and the harness length is the correct length. The 3035-P brake controller connector harness was just as easy. Plugs right in to the OEM plug next to the ECM connector and the other end into the brake controller. The PK12711U-26 - 7 pin bracket and hardware kit fastens directly the OEM bracket that is on the hitch. My truck had an OEM 4 pin trailer towing set up with the hitch. The OEM hitch had the bracket welded on it to attach the 7 pin mounting bracket to it. These kits make this install very easy and professional looking. If I have one complaint, the hardware kit to attach the 7 pin connector bracket is set up to fasten the bracket directly to the bumper with 2 - self tapping screws provided in the kit. The kit also includes 4 #12 machine screws with toothed washer nuts to attached the 7 pin connector to the bracket. This is fine if your truck hitch doesn't have an attaching bracket welded to it. The kit should included in it 6 #12 machine screws and nuts along with the 2 self tapping screws. Since my OEM hitch actually had a bracket welded to it to attach the 7 pin bracket to it, I had to use two other #12 screws and nuts to attach the 7 pin bracket to the OEM bracket on the hitch. Not a big deal, just a thought. It took me about 2 hours, start to finish to install the 7 pin connector, trailer controller, and add the two relays in the OEM relay/fuse box under the hood. I highly recommend these kits. 322339



- 118242
by:
2003 Ford F-150

I have a 2003 f150. Recently bought a camp trailer and needed trailer brakes hooked up and 12 volt to charge the trailer battery. My truck had a brake controller already installed and very poor hack job for the trailer brake wire into the existing harness.This plug in harness cleaned it all up and Now have trailer brakes and 12 volt to the trailer. One thing to check for is the relay for the 12 volt, my truck already had one in place but was not working , changed it out for the one supplied and now works. 700098



- 118242
by:
2012 Ford F-150

I do not like to leave bad reviews, however I was initially impressed from what I heard about family members who have used etrailer. I purchased the above product for a 97 ford f150 with factory tow package. This product was confirmed to fit this truck, and was listed as specifically for this truck. However the connectors are not even close, which I can understand considering that the truck was built in mid 96 as a 97 model. I called into customer service after doing a great deal of research, and discovered through ford that there were different variations of electric brake configurations for this year. I needed to return said product, that I purchased based on the websites EXACT description and etrailer wants to charge me almost 12 bucks to return a product that they advertise as "confirmed fit". I would have no problem paying for shipping if this was MY error. Customer service stated that they would request to waive shipping, confirmed my phone number, stated they would call back....never did. One would think you guys would do your homework on this before advertising a product in such a manner. I was easily able to find out that depending on when and where my truck was built would determine what type of harness is needed. 451374



- 118242
by:

I really liked your package tracking system. I have not installed the harness yet but I am sure it’s is correct 864671



- 118242
by:
2002 Ford F-150

I forgot to order the complementary parts 18140 and PK12711U. Other than that, everything else is great. 854906



- 118242
by:

Excellent products to select from. Great communication and prompt delivery. What’s not to like. I will be using them for all my boat trailer needs. 854418



- 118242
by:

Product works great and easy to install. Done in less than an hour. 822837



- 118242
by:

Excellent product. Worked exactly as described. Very easy to install. Thank you. 799764



- 118242
by:

I’ve had this product for over a year and I have absolutely no complaints. Everything was perfect. The parts were excellent quality and install pictures were easy to follow along and correct. I would definitely recommend this company to anyone in the future 792718



- 118242
by:

Fit well, easy to install, worked well 769835



- 118242
by:
2002 Ford F-150

Great product, install was simple on my 2002 F-150 plug and play! 764522



- 118242
by:
2000 Ford F-150

This wiring harness fit perfectly and plugged right into the factory trailer harness. took about 30minutes, only because the factory harness was a bear to get apart after 20 years of road grime on it. :-) 748925



- 118242
by:
2005 Ford F-150

Install was quick and easy. A year later everything is still working perfect with no problems 734614



- 118242
by:

Item fit great on truck, it was just as described. Still using it to pull my camper and will buy from Etrailer again because of there great service 726851



- 118242
by:

Makes the second vehicle that I’ve installed the custom made wiring harnesses and controller on using etrailer parts. All items were a prefect match for the vehicles just like advertised. Support from their experts was timely and accurate. Products are well made for great. Will continue to use them. 725010



- 118242
by:
2015 Ford F-150

The 7 pin wiring adapter for my 2004 F-150 Heritage worked great. My truck did not come with the towing package so it only had a 4 pin trailer connector. My new travel trailer is a seven pin with trailer brakes. The instructions and on line video made the install a breeze. I really liked it because it was “plug and play”. It only took me about 15 minutes to install. Thank you etrailer!!! 695157



- 118242
by:

Great service. Very good product. 682653



- 118242
by:

Installed this on my 1999 F150. The instructions were very detailed and made this install quick. took about 5 minutes. 680449



- 118242
by:

The product itself was as expected. However, the example I received was clearly an open-box and was missing the clip that retains the harness in the 7-way connector. 668045



- 118242
by:

Worked perfect for my 99 F150. No issue s. 662578



- 118242
by:
2002 Ford F-150

Quick delivery. Had what needed that I couldn't get locally. 661309



- 118242
by:
2001 Ford F-150

Product fit my 2001 Ford F150 exactly as the video stated. Excellent video for the installation with included part numbers needed for the correct placement. 657408



- 118242
by:
2001 Ford F-150

Just what I needed to add trailer brakes to my 01 f150. Plug and go installation. Heavy wires and quality plugs. Came with needed relays . Just pop them in the junction box under the hood and good to go. Install video made it simple. Delivered sooner than expected. 642548



- 118242
by:

great oem replacement product for our shop truck. nice easy way to replace the 7 pin trailer plug. all the connectors fit great only took 15 minutes to install and it looks like we were never under the truck. 614416



- 118242
by:
2007 Dodge Dakota

Harness came with fuses that weren’t even close to what I needed for my truck. 611646


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Ask the Experts about this Tekonsha Custom Fit Vehicle Wiring

  • How to Replace the USCAR Connector on a Trailer Wiring Harness
    In order to determine the correct function of the wires that are included with the Ford Replacement OEM Tow Package Wiring Harness part # 118242 you are going to want to plug the harness into the vehicle and have a friend sit in the cab and operate the signals while you are testing them with a circuit tester like part # ALL640595. It does not appear that the wires leading into the USCAR connector follow the RV standard 7-way wiring colors exactly. In order to replace the USCAR connector...
    view full answer...
  • Circuit Configuration in RV-Type 7-Way Trailer Wiring
    Your photo shows the 7-way trailer wiring setup that we call the RV format. The photo I linked shows an actual trailer plug # A10-7W6 like yours and the circuit arrangement is the same as your photo diagram. For reference, the included article covers all wiring formats in detail. The item you referenced, replacement OEM wiring harness # 118242, is configured in the same way.
    view full answer...
  • Recommended Trailer Wiring for 2006 Ford F-150
    If you are using the Ford Replacement OEM Tow Package Wiring Harness, 7-Way # 118242 on your 2006 Ford F-150, that is most likely the issue. That harness only is compatible with models up to 2004. For your 2006 F-150, you will either use the 4 way # C56031 to give you a 4-way trailer connection or # 74682 if you are replacing a 7-way connector. If you wish to upgrade from a 4-way to a 7-way, then you will want the Adapter 4-Pole to 7-Pole and 4-Pole # 37185 and after connecting...
    view full answer...
  • Parts Needed to Install Trailer Brake Controller in 2005 Ford F-150 with Factory 4-Pole Wiring
    All you need to install a brake controller like the Prodigy P2 # 90885 in your 2005 Ford F-150 with a factory 4-pole is quick-connect wiring adapter # 3035-P and 7-way socket # 37185. The wiring adapter joins the controller to the under-dash port on the truck and the 7-way converts your existing 4-pole flat trailer wiring to a 7-way format. You will use the wires that are tucked away under the rear bumper to make connections with the pigtail leads on the # 37185. You will need also some...
    view full answer...
  • 4-Pole to 7-Way Wiring Conversion Kit for 2011 Ford F-150
    If your 2011 F-150 has a pre-installed 4-pole harness (which probably has a rectangular connector on the truck side like the one on parts # C56110 and # HM11140735; see the linked photo, please) then you can convert that wiring to a 7-way using kit # ETBC7. This kit has all the parts needed to upgrade the 4-pole setup to a fully functioning 7-way. You will retain your current 4-pole and plug it in to the included 7-way adapter in the kit, then make a few more wiring connections for...
    view full answer...
  • Adding a Brake Controller to a 2011 Ford F-150
    If your 2011 Ford F-150 came with a factory installed 7-Way trailer connector or even a factory 4-Way trailer connector then you can plug in a brake controller using the proper wiring harness. For a controller I recommend the P2 # 90885 because it's easy to set up and use and it is reliable. The wiring harness needed to plug this controller into your truck is # 22292. I have linked a video showing how and where this harness plugs into on your truck. If your truck came with just a...
    view full answer...
  • Parts Needed To Add 4- And 7-Way Trailer Connector Without Splicing For 2002 Ford F-150
    Based on your information, I recommend the Tekonsha Ford Replacement OEM Tow Package Wiring Harness, Item # 118242. This item connects directly to your OEM tow package on your 2002 Ford F-150. Because this harness only has a 7-way connector, I recommend adding the Hopkins 7- and 4-Pole Trailer Connector, Item # HM40975, so that you have both options available. Both will work with your 2002 F-150 and no splicing will be required. If you have a 4-Way connector and would not mind some...
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2011 Ford F-150
    The 2011 Ford F-150 should have come with either a factory 4-Way or factory 7-Way trailer connector. To upgrade from a 4-Way to a 7-Way you will need # 37185. If you follow the factory 4-Way wiring under the truck you will see where it plugs into another harness. The wiring for this other harness will have a 12 volt power wire and an output wire for trailer brakes. Pull back the protective covering over the wiring for this forward connector to find them. The power wire should be orange...
    view full answer...
  • Ford Replacement OEM Tow Package Wiring Harness Compatability with 2006 Ford F-150
    The Ford Replacement OEM Tow Package Wiring Harness, 7-Way, item # 118242, fits the following vehicles. 2000 - 2003 Ford F-150 Stepside Models 1997 - 1999 Ford F-150 and F-250 Light Duty Stepside Models 2004 - 2004 Ford F-150 Heritage Series Stepside Models 2000 - 2003 Ford F-150 Styleside Models 1997 - 1999 Ford F-150 and F-250 Light Duty Styleside Models 2004 - 2004 Ford F-150 Heritage Series Styleside Models 2000 - 2003 Ford F-150 with factory 4-Flat 1997 - 1999 Ford F-150...
    view full answer...
  • How to Replace the Trailer Connector and Wiring Harness on a 2002 Ford F-150
    I have exactly what you need to replace the 4 and 7-way trailer connector and wiring harness on your 2002 Ford F-150. In order to do this you are going to want to use both the Ford Replacement OEM Tow Package Wiring Harness part # 118242 and the 7- and 4-Pole Trailer Connector Socket part # HM40975. The wiring harness is not available separately so what you will need to do is instead of using the included 7-way you would need to swap that out for the 4 and 7-way trailer connector which...
    view full answer...
  • Installation of Brake Controller On My 2011 Ford F-150 Without Tow Package
    It is possible that the wires you are looking for have been terminated farther up the frame rail or may not have been ran back. Typically the wires would run to where the factory 4-way is plugged into, usually near the spare tire. If you cannot locate the wires, you will just need to hardwire the brake controller and 7-way, which is not as bad as it sounds (we have a kit for this). You will need the Brake Controller 4 and 7-way Installation Kit, part # ETBC7. To install, you will begin...
    view full answer...
  • 7-Way Trailer Connector for 2011 Ford F-150
    The wiring harness you referenced, part # 118242 would not be compatible with your 2011 F150. It is designed for the 1997-2003 model years only. The parts necessary to provide a 7-way for your F150 would depend on how it was equipped when it left the factory. If your F-150 has the factory round plug located along the drivers side frame rail behind the back bumper, you would use part # 74682. The factory plug will have a dust cover that will need to be removed, and the 74682 would...
    view full answer...
  • Recommend 7-Way Wiring Harness Needed For 1999 Forf F-150 With No Trailer Connector At All
    I believe the connector you found is the connector you will use to plug in the wiring for your 7-way connector. There should be a wiring connector along the drivers side frame rail at rear of truck between the rear wheel and the rear of truck (see FAQ and video). To install a 7-way on your 1999 Ford F-150, you will need Ford Replacement OEM Tow Package Wiring Harness, part # 118242, which includes all necessary adapters and fuses. Before installing part # 118242, you will want to disconnect...
    view full answer...
  • How to Install 7-Way Trailer Connector on 2011 Ford F150
    The parts necessary to provide a 7-way for your F150 would depend on how it was equipped when it left the factory. If your F-150 has the factory round plug located along the drivers side frame rail behind the back bumper, you would use part # 74682. The factory plug will have a dust cover that will need to be removed, and the 74682 would plug right it. If your F-150 does not have the round plug, but has a 4-pole connector, part # 37185 can be used. It would plug into the existing...
    view full answer...
  • No Power on Brake Controller Blue Wire on 2002 Ford F-150
    It wouldn't be a fuse since the brake controller is getting power. If the truck is parked then there may not be any power on the blue wire when stepping on the brake pedal (depending on which controller you are using) but there should be power when using the manual override. There are some things you can do to test a brake controller. In the truck cab you will need to sever the blue wire several inches from the back of the controller. Then use a circuit tester such as # 40376 to test...
    view full answer...
  • Adding 4- and 7-Way Trailer Connector to 2003 Ford F-150, Wiring Electric Utility Winch on Trailer
    Lets start with the wiring connector for your 2003 Ford F-150. With a look under your truck we can determine if the 4-Way flat on your truck is a factory plug or not. If the 4-Way connector is a factory connector, the wiring harness will be connected to the vehicle wiring harness along the driver's side frame, between the back tires and the end of the truck bed. I have attached a photo showing what the connector will look like. If you find this connector on your truck, you can use...
    view full answer...
  • Parts Needed to Add a 7-Way Trailer Connector to a 2007 Ford F-150 with Factory 4-Way
    To install a 7-Way trailer connector on a 2007 Ford F-150 with a factory 4-Way, you will need to use # 37185. This is part plug and play and part hardwire, but the hardwire locations are easy to access. You will need to ground the white wire to the vehicle frame. The purple wire is for reverse lights if needed. You would need to tap into a reverse light wire on the vehicle. The blue wire is for the trailer brakes and the black wire is for 12 volt power. To connect these wires, follow...
    view full answer...
  • No Power On Newly Installed Brake Controller on a 2002 Ford F-150
    You might want to check where the fuses and relays from harness # 118242 install on the truck. For some reason, on certain model trucks Ford did not include the metal contacts in the places where those fuses and/or relays install. If that is the case on your truck then the brake controller will have to be hardwired in. Be sure to also check for an in-cab fuse panel, if equipped, to see if any fuses need to be installed there as well. Also, you mentioned that only 3 of the wire contacts...
    view full answer...
  • Parts Needed to Add a 7-Way Trailer Connector to a 2003 Ford F-150 without Factory Tow Package
    If your 2003 Ford F-150 came with a factory installed 4-Way wiring harness, you can use the Ford Replacement OEM Tow Package Wiring Harness, # 118242. I have included a link to the installation instructions and a video showing a typical installation. Once you have installed this harness into the factory connector under the truck, and inserted the fuses and relays where needed, the 7-Way should be fully functional. You will need to check the center pin with a circuit tester like # 40376,...
    view full answer...
  • Installing a 7-Way Trailer Connector on a 2001 Ford F-150
    Your 2001 Ford F-150 likely came with a factory 4-Way and someone spliced in a 7-Way at some point. To determine if the truck is set up already for a fully functional 7-Way you can check under the hood to see if the necessary relays and fuses are present. If they are then you could use Curt harness # C55242 and it will work. If the fuses and relays are not present then they would also need to be added and I recommend harness # 118242 which includes them as well as the 7-Way. I have linked...
    view full answer...
  • Adding 7-Way and Brake Controller on a 2001 Ford F-150 with Factory 4-Way Trailer Connector
    If your 2001 Ford F-150 has the factory 4-Way flat trailer connector then you can use harness # 118242 to add a 7-Way. Once plugged in in place of the 4-Way harness and after the included relays and fuses are installed then it will be fully functional including the orange and blue wires. You would only have to splice into them if you were hardwiring in a 7-Way. But for your truck and year you can just plug in this harness. The orange wire will be active and the blue wire will be ready...
    view full answer...
  • Can Tow Ready Custom Fit Wiring Harness Be Used With Pollak 7 and 4-Pole Connector Mounting Bracket
    Yes, the Tow Ready Custom Fit Wiring Harness, # 118242, for your 2001 Ford F-150 can be plugged into the back of the Pollak 7- and 4-Pole Trailer Connector Mounting Bracket, # HM40975.
    view full answer...
  • Replacement 7-Way Wiring Harness for 2005 Ford F-150 with Factory Tow Package
    From your question it sounds to me like someone has cut off the tow package plug on your 2005 Ford F-150 and wired in a 4-way connector. In this case you could use the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole, # 37185 which will give you a 4-way and 7-way connector.
    view full answer...
  • Solution for Needing 13A576 For 2006 Ford F-150
    The part you referenced, 13A576-GB, is a Ford part. What you can do is use # 118242 and add # HM40950 which is a 4- and 7-Way in place of the 7-Way that comes with # 118242. I have linked videos on both parts for you. The Ford part is twice as much and you might still have to purchase from them the relays and fuses that are already included with # 118242.
    view full answer...
  • Parts Needed To Install 7-Way on 2007 Ford F-150
    To install a 7-way wiring harness on your 2007 Ford F-150, I would recommend using the Brake Controller 7 and 4 Way Installation Kit, part # ETBC7. The # ETBC7 kit will come with all the wiring and circuit breakers needed for installation. To install, you will begin by connecting your existing 4-way to the 4-way on the ETBC7. The White wire is ground and will need to be connected to a clean metal surface on vehicle frame. The Black wire and should be connected to the vehicles battery...
    view full answer...
  • How to Determine the Factory Trailer Wire Functions on a 2005 Ford F-150
    I may have some information that will help, however, vehicle manufacturers are notorious for changing the wire colors on their factory trailer wiring, so the best way to determine the function of each wire is by testing. To test the wires, I recommend using a circuit tester like part # 40376. Find a good ground for the tester and test each wire as a helper activates each light function on the truck. We had a 2006 Ford F-150 on our lot with the factory tow package wiring, so I went to...
    view full answer...
  • Does the Ford Replacement OEM Tow Package Wiring Harness Include a Battery Isolator
    The Ford Replacement OEM Tow Package Wiring Harness, # 118242, includes the wiring and relays needed to replace the factory 7-Way on a truck that has the factory tow package. If the original tow package included a battery isolator feature it would be part of the tow package wiring on the truck and not in these replacement items. In order to see if the 7-Way has power even with the key off, you can test the 7-Way at the back of the truck with the key off using a circuit tester like #...
    view full answer...
  • Troubleshooting a Replacement Ford Tow Package Wiring Harness for No Left Turn Signal
    I would try unplugging the harnesses and relays and then plugging them back in as it sounds like the left turn signal circuit is not making contact somewhere and it could be as simple as reconnecting the harness to fix the problem. Next. I would check the vehicle side plug that the Tow Ready Custom Fit Vehicle Wiring # # 118242, plugs into. If this circuit is functioning properly then check the wires coming out of the new connector to determine if the power is getting to the 7-Way harness....
    view full answer...
  • Turn Signal Lights Freeze when Trailer Is Connected to a 2010 Ford F-150
    It sounds like there is either a short circuit causing constant power draw or back feeding or the truck connector and trailer connector are wired differently and the turn signal issue is a result. To determine where the problem is you can plug in a different trailer and if the same issue happens then there must be an issue with the truck tow package wiring. If it does not happen then the issue is on the trailer. You can test the truck connector with a circuit tester # 40376. Have...
    view full answer...
  • Troubleshooting Electric Trailer Brakes and Running Lights not Working on Trailer, 2006 Ford F-150
    I have a couple of ideas that may help solve the problem you are having on the 2006 Ford F-150. First, you mentioned that the truck has the tow package. It is possible that you will need to add or replace fuses and/or relays to allow the tow package to be fully functional. Your vehicle owners manual should have the locations of these fuses/relays and you can check to make sure everything is present and in working order. Next, you can check some of the wiring to determine if it is the...
    view full answer...

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  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Test Fit:
Joe V
Expert Research:
Mike L
Expert Research:
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Adam R
Expert Research:
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Updated by:
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Updated by:
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Installed by:
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