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  1. Custom Fit Vehicle Wiring
  2. Tow Ready
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
  6. No Converter
Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty)

Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty)

Item # 118243
Retail:$90.87
Our Price: $60.96
You Save: 33%
Custom Fit Vehicle Wiring

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Tow Ready 7 Round - Blade Custom Fit Vehicle Wiring - 118243
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Tow Ready Custom Fit Vehicle Wiring - 118243

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • No Converter
  • Tow Ready


Replacement OEM Tow Package 7-Way Wiring Harness for 99-01 SuperDuty Trucks with OEM 4-Flat Connector
  • Exact Replacement for Damaged OEM Wiring Harness
  • Installs in Seconds
  • Upgrades Vehicles From 4-Flat OEM Wiring to 7-Way Connectors
  • Connects Directly to Standard OEM Connector
  • Fuses and Relays Included

Product detail
Picture of 7-Way Connector.

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118243 Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty)

Installation Details 118243 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:


Customer Reviews

Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty) - 118243

Average Customer Rating:  4.8 out of 5 stars   (399 Customer Reviews)


by:
Ford F-250 Super Duty

I purchased the 90° 7-pole wiring harness for the bed of my F250 and the OEM replacement 7-pin harness for the rear bumper. I'm the 2nd owner and for a long time I left the plastic bed-liner in it. When I removed it recently I discovered there was a hole in the bedside from the previous owner. I use my truck to pull a fifth-wheel camper too, and the bumper wiring harness pretty much maxes out my trailer's pigtail. Both wiring harnesses were very easy to install, and I was even able to trim the spacer provided with the kit to fit the contour of the bed where the previous owner had drilled the hole. It looks like it came installed from the factory!



by:

Customer service is a joke. Attempted to return an unopened item and they wanted to charge a fee of more than half what the item cost. Never doing business with them again!



by:
1999 Ford F-250 Super Duty

I have a 1999 F250 4x4 and wanted to upgrade from 6 round to 7 round to match the car trailer I had just bought. I had almost given up on finding a plug and play up grade and was preparing myself to start cutting wires. I'm so thankful that I found this web sight. They have a very large selection including the one that I needed. On top of that the video of how to install was spot on. I would not have thought of having to add a fuse and upgrade another under the hood.
They were very helpful, great turnaround time and great product. I will definitely buy from them again.



by:
1999 Ford F-250 Super Duty

Attached are images of the installation in a 1999 Ford F250 Super Duty 4WD 4 Door 8' bed. I left the 4 prong connection mounted, and tied and bagged the connection for future use if needed.



by:
2001 Ford F-350, 450, and 550 Cab and Chassis

the parts fit, brake controller is now working, just confused which relay was 38 and 39. I guessed and was right. thank you for the fast service. Yes I will order again.



by:

Right part right plug on both end . 1 st pick is old harness 2nd is new harness. 3 rd is howl will use it .



by:

Plugged right into my original wire harness everything went together just fine
Done what it said and said what it did all the wires were spot on



by:

Excellent harness for my super duty. After using one year with multiple trailers it's still working great.

Matthew

12/12/2022

Still working great after one year.



by:

It worked great, I simply removed the old one and replaced it with yours and everything is working fine. Thank you.

Kevin

6/2/2023

Great, I have pulled several different trailers all lights work. No problems.



by:

Part was just as described, it plugged right in to my vehicles wire harness and now provides trailer lighting. I would recommend etrailer to anyone!



by:

I replaced my 22 year old factory plug with this and it works perfectly. Would highly recommend if you are looking for the OEM replacement plug.



by:

I got this 7 way plug for my 99 f350 because the old one was corroded and didn't work properly. This unit was priced right arrived in a timely manner and was very simple to install. I just had to find where on the harness the old one plugged in and plug the new one in.

John S.

11/8/2021

One year later and it has performed flawless!



by:
1999 Ford F-350 Super Duty

I have a 1999 Ford F350 Superduty. Fit perfect to the old ford bracket and the wiring harness was an exact fit. Works like a charm.



by:

Well , first, I thought it was a ford replacement part , when it came in , not 1 but 2 of them serparate packages , then when I go to install, I see it’s not the double with regular plug also, so this part is useless for me. The one on my truck has 7 pin and 5 pin together. You can not take 7 pin out and switch with new one. Not sure why you sent two kits

Etrailer Expert

Jenny N.

6/22/2022

You mentioned that you wanted to have a harness that would have both the 7- and 4-way connection. I am happy to see if we have what you are looking for. What is the year, make, and model of your truck? Did it come with a factory 7 way?

Gary

6/22/2022

Yes ma’am, it came from Ford that way F-450 platinum, all options. Let me know if you carry the dual plug together,please

Etrailer Expert

Jenny N.

6/22/2022

What is the year of your Ford?

Gary

6/22/2022

2016 F-450 Platinum Dually

Etrailer Expert

Jenny N.

6/22/2022

I looked at everything that we have for the 2016 Ford 450 Platinum Dually and we do not have a seven way to offer that also comes with the four way. I had wanted to offer part HM40975 as a solution because it works with the Ford 350 however it will not. I am guessing it is because the F 450 does not have the round US Carr connection. That is my best guess.



by:

Exactly what I needed. Fit perfectly.



by:

The parts arrived in an orderly time and were exactly what I ordered. Thank you for your great customer service.



by:
Ford F-250 Super Duty

2001 Ford F250 wiring tow harness was a perfect fit. Plug n play.



by:
2001 Ford F-250 Super Duty

Did not receive at address listed on or der.

Etrailer Expert

Katrina B.

3/12/2023

Well that does not sound good! Lets look into this a bit more. Was it received at a previous address or not at all? You should check with your neighbors to see if they accidentally got it in your place. Our customer service department is looking into this and will be in contact with you shortly.



by:
1999 Ford F-250 Super Duty

I upgraded the tow package wiring on a "new to me" 1999 F250 Superduty from the jerry-rigged mess the previous owner had gobbed together to one utilizing the truck's existing trailer tow package, both for the rear of the truck and inside the box for the gooseneck ball hitch. The wiring harness, receptacles, et. al. from etrailer plugged right into the truck's wiring harness with ease, and I would highly recommend their products.
Customer service was impeccable...assisted with an order mix-up on my part, helped me locate the truck's wiring harness plug under the dash, and provided help with finding the correct harness for an older model trailer brake that I already possessed.
To the staff at etrailer---thanks and keep up the great work! When I need trailer parts again, you will be the first I contact!



by:

Awesome direct replacement fit . Plug and play replacement. I did have to drill a hole in my trucks mounting location as not all the holes lined up exactly but that was a minor inconvenience for the ease of replacement!

Don D.

6/29/2021

A year later its still working great



by:
1999 Ford F-250 and F-350 Super Duty

Great plug and play product. The factory option costs (depending upon the source) 3-4 times what etrailer offers, so this was the clear and wise choice. Fit the factory harness with no modifications.

Nick P.

8/17/2018

Still seems to be working well. Thanks for the check up.



by:
2000 Ford F-250 and F-350 Super Duty

It is great that it comes with the relays and fuses and instructions for me to take off my 4-way factory plug and install the 7-way with the factory connector. It is plug and play easy. The only thing lacking is a bracket to mount the 7-way connector. I also fit this one because it has the round sealed plug to be able to change out the 7-way easily should it become damaged or if I want to change the style.



by:
1999 Ford F-250-and-F-350-Super-Duty

Yup, that's right even if you voted for Hillary you can install this wiring in your truck. Get a good hole saw, cut hole, plug and play!

John W.

12/1/2017

Works great, idiot proof.



by:
2001 Ford F-350 Super Duty

Quick and easy install on my 2001 F350. Took less than 5 minutes to install as a direct replacement for my broken OEM one. Best part about it was saving $120 over the Ford part. Worked on the first try. Did not need the relays and fuses for my application as they were already installed but now I have spares.

Jamey M.

3/15/2015

Update: one year later and it has worked flawlessly. Zero problems when used in any and all conditions from hot and dry to snow to rain.



by:
2001 Ford F-350 Super Duty

Exactly what was needed.


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Show More Reviews

See what our Experts say about this Tow Ready Custom Fit Vehicle Wiring

  • Will the Ford Replacement OEM Tow Package Wiring Harness Provide a Fully Functional 7-Way
    Yes, if you install this Ford Replacement OEM Tow Package Wiring Harness # 118243 it will be fully functional and would work to operate the lockout solenoid of your 1999 Ford Super Duty. You will need to install the included relays and fuses to complete all the circuits. Check out the installation instructions I attached for this product.
    view full answer...
  • What Does the Tekonsha 118243 Fit?
    The plug on the end of the Tekonsha # 118243 that connects to the vehicle does indeed have 4 larger pins and 4 smaller pins. I included a picture of the plug end of the harness, but it isn't super easy to see the pins. It should be noted that this will fit a 1999 to 2001 Ford F-250 and F-350, F-350, F-450, and F-550 Cab and Chassis, and the F-53 with the factory tow package.
    view full answer...
    Image 1 for
  • Where Do I Put the Relays Provided with 118243 In My 2000 Ford F-250 Super Duty Fuse Box
    The trailer tow backup lamp relay and trailer tow battery charge relay that is provided with the Tow Ready 7-way wiring harness part # 118243 for the 2000 Ford F-250 install in the trailer tow relay block. The relay block is located in the engine compartment near the brake master cylinder according to the owner's manual. The trailer tow backup lamp relay is position 38 and the charge relay is position 39. The Relay block is near the power distribution box in the engine compartment.
    view full answer...
  • 7-Way Trailer Wiring Harness Recommendation for 1999 Ford F-250
    Based on the picture you send in the correct 7-way trailer wiring harness you are looking for is the part # 118243 which matches the connector and is a confirmed fit for your 1999 Ford F-250. I attached an install video for this harness below for you to check out as well.
    view full answer...
    Image 1 for
  • Solution for Needing Just Harness of Ford OEM Tow Package Wiring Harness 118243
    The only way we offer a way to get the intermediate harness of the Ford Replacement OEM Tow Package Wiring Harness # 118243 is with the entire kit. I wish we had just the part you need but we do not. At least with this you'd have a backup 7-way, fuses, and relays. Other option might be to contact a Ford dealer.
    view full answer...
  • Troubleshooting 7 Way Trailer Plug on 2020 Ford F350 Super Duty With No Power on Plug
    In the top left corner of the engine compartment fuse box, you're looking for #7, which is a 30a fuse and corresponds to the "Trailer Tow Battery Charge"; there should be a fuse box diagram either in the owner's manual or on the cover of the fuse box that you can use to confirm this. You'll want to check to make sure there is a fuse in that spot and that it's in good working order. I would start by checking there; if you're still having issues after checking the fuses let me know and...
    view full answer...
  • Solution for Replacement Trailer 7-Way Harness Recommendation for 2000 Ford F-250
    I wish we had just the harness but the best we can do is the part # 118243 which also comes with a new 7-way and a couple fuses and relays. Most likely this will cost less than getting the harness from a Ford dealer and it comes with some spare parts so it might still be an option for you to consider. This does not have a 4-way included.
    view full answer...
  • Replacement Trailer Connector and Factory Wiring Harness for a 2000 Ford F-250
    The Ford Replacement OEM Tow Package Wiring Harness part # 118243 is indeed a fit for a 2000 Ford F-250. It will replace the 7-way trailer connector as well as part of the trailer wiring harness from the square pigtail onward. I would not have any options to replace any part of the factory trailer wiring harness up to the square pigtail.
    view full answer...
  • Why do I need to replace the 7-way on my 1999 Ford F-350?
    The Ford Replacement OEM Tow Package Wiring Harness, item # 118243, upgrades your vehicle 4-flat OEM wiring to a 7-way connector to fit the plug on your trailer. It will also replace a damaged 7-way OEM wiring harness. So unless you either need to upgrade or replace your plug, you will not need this. To adjust a Voyager brake controller, you can make several slow stops around 25 mph, as if you are coming up to a stop sign, and take notice of how the trailer brakes respond. If the brakes...
    view full answer...
  • Troubleshooting Right and Left Turn Lights and Brake Lights Not Working on a 2003 Ford F-250 7-Way
    You have done a great job troubleshooting the problem so far and have isolated the issue to the truck wiring. I have confirmed with my contact at Tekonsha, and another fuse that you might check would be fuse # 6 in the under dash junction box. This is a fuse for the trailer towing light relay. This will be a 20 amp fuse. This sounds like this is the fuse that is most likely causing the issues on your 2003 Ford F-250, since you do not have either brake or turn signals. The # 6 fuse is...
    view full answer...
  • How to Determine Where the Fuses and Relays of Ford Replacement Harness # 118243 install on F250
    You will need to locate the vehicles power distribution box and the trailer tow relay block attached to it. This is under the hood on the driver side. You will need to open the cover to access the fuses. The information for where the fuse locations are will be in the owners manual of your vehicle or even if there is a legend on the fuse box cover you can use that. You will be looking for the trailer tow electric brake and trailer tow battery fuse locations. For the relays you will be looking...
    view full answer...
  • Replacement Tow Package Wiring Harness for 2000 Ford F-250 Super Duty
    The Tow Ready Replacement OEM Tow Package Wiring Harness # 118243 can absolutely be used to replace the 7-way harness on your 2000 Ford F-250 Super Duty, as long as the square connector under your vehicle has not been damaged. The harness can be quickly installed by simply connecting it directly to the OEM connector under your vehicle. I have included the installation details for your review.
    view full answer...
  • No Power to Tow Package Fuses on a 1999 Ford F-250
    If there is no power to the tow package fuses then it either means that the relays associated with the tow package wiring are bad or missing or that the contacts in the power distribution box for those fuses are not present. The best way to test a relay is to use a known good one in place of a bad one. If the function starts working then you know that was the issue. We do not carry the relays by themselves so you would need to get them from a Ford dealer. Fuses and relays get fed power...
    view full answer...
  • Only Running Light Circuit Works on 1999 Ford Expedition 7-Way Trailer Connector
    The problem that you have with the 7-Way on your 1999 Ford Expedition could be a dirty or corroded trailer connector. Make sure that the connector is clean and free of corrosion inside, where the wires attach, and outside on the pins themselves. Also check for loose or damaged wires and fix as needed. If you still have problems then it could be a fuse or relay related to the tow package wiring. There are several on your Expedition: In-cab fuse box: Location 23 for trailer tow battery...
    view full answer...
  • Running Lights Stopped Working on Horse Trailer Towed by a 2003 Ford F-350
    Running/tail lights are on the same circuit on your 2003 Ford F-350. The likely problem is a blown fuse or relay associated with the running light circuit. Use the truck owners manual to find all the locations of the fuses and relays used for the tow package wiring. Checking fuses is easy but to check a relay the easiest thing to do is to place a known working relay in place of a possible bad one. If the function then starts working then you know it was a relay. I have linked a help article...
    view full answer...
  • Brake Lights on Trailer and 2002 Ford F-350 Stopped Working After Fixing Bad Trailer Ground
    On your 2002 Ford F-350 the fuse panel is in the cab of the truck like you said. If all of the fuses are good then it is likely a bad relay. In the fuse panel location 6 is a the turn/stop relay, location 18 is the turn/brake on/off switch relay, location 34 is the brake on/off switch fuse. Any relay or fuse that says trailer tow or has anything to do with brakes is what you will want to check. Checking fuses is easy but for relays the easiest way is to use a known good relay in place...
    view full answer...
  • Wiring Harness for 2000 Ford F-250 and F-350 Super Duty
    Yes, as long as your pickup does not have the factory Deep Drop Bumper, and has the factory 4-flat connector, this kit will upgrade your trailer wiring to the 7-way connector and the fuses and relays will activate the brake and accessory functions at the connector.
    view full answer...
  • Where To Install Fuses and Relays From Tow Ready Wiring Harness # 118243 on 1999 Ford F-250 SD
    On your 1999 Ford F-250 Super Duty the two boxes in the engine compartment are the power distribution box (larger box) and the trailer tow relay block (smaller box) which is attached to it. Open the covers to access the relays and fuses. You will need to look in your owners manual and locate the Trailer Tow Electric Brake and Trailer Tow Battery Charge fuse locations and insert the 30 amp maxi-fuses (provided) into them. Also in the owners manual locate the Trailer Tow Backup Lamp Relay...
    view full answer...
  • Troubleshooting Not Being Able to Find Fuse Slot Listed in Owner's Manual of Vehicle
    I am not totally sure what your vehicle is, but sometimes there can be more than one fuse box on a vehicle and you may be looking at the wrong diagram or box. Check to see if there is a fuse box on the interior of your vehicle as well as one under your hood.
    view full answer...
  • No Power at Trailer Connector on a 1997 Ford F-250
    There may be a relay that is bad. Use the owners manual to find the relay locations related to the tow package wiring. To test a relay you basically have to take a known good relay and install it in place of the possible bad one. If the function starts to work then that was the issue. If the fuse and relay are both good but there is still no power getting to the fuse that indicates a problem with the truck wiring somewhere that will have to be checked out by a qualified mechanic or Ford...
    view full answer...
  • Where to Install the Relays and Fuses in a 2001 Ford F-250 to make the 7-Way Functional
    On your 2001 Ford F-250 Super Duty the two boxes in the engine compartment are the power distribution box (larger box) and the trailer tow relay block (smaller box) which is attached to it. Open the covers to access the relays and fuses. You will need to look in your owners manual and locate the Trailer Tow Electric Brake and Trailer Tow Battery Charge fuse locations and insert the 30 amp maxi-fuses (provided) into them. Also in the owners manual locate the Trailer Tow Backup Lamp Relay...
    view full answer...
  • What Relays Needed in 2001 Ford F-250 Super Duty V10 4x4 to Activate the 12V Circuit on 7-Way
    The relays you need to activate the 12V charging circuit for your 5th wheel are not offered separately at etrailer. These should be available from your local Ford dealer or auto parts store. There should be indications in your owners manual and/or labels on the relay boxes to indicate the location and type of relays required to activate your trailer charging circuit. The relays included in the part you referenced, TowReady Ford Replacement OEM Tow Package Wiring Harness # 118243, are...
    view full answer...
  • 12-Volt Accessory Power Feed on 2008 Ford F250 is Not Charging Travel Trailer Battery
    In order to activate the 12-volt accessory power feed to the 7-way, there is a fuse and a relay that need to be installed in the fuse box under the hood. Your owners manual or the legend on the fuse box lid will show you the correct location. If the accessory circuit once worked in the past, check for a blown fuse or a bad relay. If the fuse and relay are already in place and are not faulty, please get back with me and will will look into some other less likely possibilities. Keep in...
    view full answer...
  • Blower Fan for Heater/AC is Not Working, Do All Relays and Fuses have to be In Place for It to Work
    Relays control specific functions so if one is not in place or blown then only the functions associated with it would not work. What I recommend is to consult the vehicle owners manual for all of the fuse and relay locations so you can check the affected ones related to the circuits that are not working to determine what is missing or blown. Relays are harder to check than fuses. The easiest way to check to see if a relay is bad is to use a known working relay in place of a potential bad...
    view full answer...


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