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  1. Custom Fit Vehicle Wiring
  2. Tow Ready
  3. Custom Fit
  4. 7 Round - Blade
  5. Trailer Hitch Wiring
  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)

Retail:$110.72
Our Price: $65.59
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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

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


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)

Item # 118243

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   (400 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:
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:
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:

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:

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:

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-350, 450, and 550 Cab and Chassis

Showed in stock when purchased, it was not in stock, and I am now waiting for a ship date to be determined.



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:

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:

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:

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:
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:

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:
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:
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:
1999 Ford F-350 Super Duty

I utilized this product on my 1999, Ford, F-350 Super Duty to replace the OEM factory harness and it worked exactly as promised. Within several minutes the installation was completed and I was ready to tow. e-trailer customer service is excellent!

Ed G.

9/18/2015

Still works fine!



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:
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

Product was need for a time sensitive job. Prompt fast service. Was delivered a day early. Quick easy hook-up. Completed the job and everyone was happy. I recommend this product.



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:

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:
2002 Ford F-250 and F-350 Super Duty

Should have bought the factory end. The wiring harness on my truck didn't match. I had to cutoff my old end and re-terminated to the new plug in order to make it work. Kind of defeated the purpose of having factory made ends.

Etrailer Expert

Patrick B.

11/19/2012

This connector is only compatible with 1999-2001 F-250F-350 Super Duties. It will also work with 1999-2001 F-450/550 Cab and Chassis with factory 4 connectors and 2001 F-350 Cab and Chassis with factory 4 connector.



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:
2000 Ford F-250 Super Duty

I bought the 118243 replacement 7 way trailer connector for my 2000 Ford F250 7.3 Super Duty. Hooked it up in less than an hour. I also needed the adapter bracket 11840. Without this bracket, the 118243 connector would not mount correctly to my truck. It would not clear the bottom of my bumper in the original mounting position on the bumper. I also bought the Pollak 7 plus 4 way connector because I have multiple trailers with different connectors. This product is HM40975 and I highly recommend that it be purchased with the other two products.

The guys at eTrailer really know their products and are so helpful. They know what exceptional customer service is all about. Also, I love all of their online videos and information on the website that allows you to make informed decisions. Their prices are very competitive too. With free shipping over $99, they can't be beat.. For those reasons, I will not buy trailer gear anywhere else.


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Show More Reviews

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

  • Wiring And Adjusting The Tekonsha Voyager Brake Controller, # 39510, On A 1999 Ford F250/F350
    I am sending a link to the instructions for the Tekonsha Voyager Brake Controller, # 39510. It will show you how to adjust the brake controller. They do not have a wiring schematic, but I can explain how to wire it to a 1999 Ford F250/F350 truck. If your 1999 Ford F250/F350 has a factory installed 7-Way trailer connector, all you would need is the brake controller and the factory brake control adapter that connects to the controller and plugs into the OEM plug. The OEM plug is located...
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  • No Power to Trailer Running Lights on 1999 Ford F-250
    I checked the owner's manual for a 1999 Ford F-250 and it shows that the trailer park lamps are controlled by the number four fuse in the power distribution box under the hood which is a twenty amp. If the fuse checks out, there is also a relay to check located in the same power distribution center but at number thirty-eight. If the fuse and relay are good then you'll want to check the trailer connector, this may need to be replaced for which we offer the Ford Replacement OEM Tow Package...
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  • 7-Way Replacement Recommendation for Ford F-350 that Uses Square Connector
    Although I don't know the year of your Ford F-350 it does sound like you have an older Super Duty that uses the square connector for the trailer wiring which means that for a 7-way replacement you'd need the # 118243 for something that would plug right in. If you needed the 7 and 4-way connectors you'd need to swap out the included 7-way for the # HM40950 and you'd be set. The Bestop Underseat Locking Storage Box # B4264101 that you referenced does not fit flip or fold up seats but will...
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  • Trailer Brake Controller Wiring Harness for a Tekonsha Prodigy and 2001 Ford F-250 Super Duty
    For a 2001 Ford F-250 Super Duty, you would need to use harness # TK93VR. I have included a link to the installation instructions for you. If your truck just has a 4-Way trailer connector, you will also need # 118243. I have included a link to the installation instructions for this harness as well.
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  • Trailer Wiring Harness for a 2002 Ford F-250 That Connects To Square Plug Under Vehicle
    In order to obtain the trailer wiring harness that connects the square plug under the vehicle to the back of the 7-way trailer trailer connector you can use the Ford Replacement OEM Tow Package Wiring Harness part # 118243. I understand that you are just looking for the wiring harness portion but we do not offer this separately as this is more or less a part of the factory wiring which we don't really carry therefore this is your best option unless you want to go to the dealer. The harness...
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    Image 1 for
  • Adding Trailer Wiring Harness to a 1999 Ford F-350
    If your 1999 Ford F-350 came with a factory 4-Way trailer connector, you can add a 7-Way using # 118243. I have linked a video showing installation for you. To add a 7- to 4-Way adapter the most popular option is # PK12716. If the truck did not come with any type of trailer connector then to add a 4-Way you would need to use # 18252. Then to add a 7-Way you would need # ETBC7.
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  • No Power on 7-Way Connector on 2000 Ford F-350 With Tekonsha Primus Brake Controller, # TK90160
    If your F-350 did not come with a complete factory tow package you may need to install some additional fuses and relays to get power to your 7-way. Your owners manual or the lid of your fuse box should have legends showing which fuses/relays activate/protect which circuits. If you only need the fuses and relays you can obtain these from a local auto parts store. If you prefer a complete kit with 30-amp fuses, relays and plug-in harness with 7-way connector, we offer the TowReady Custom...
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  • Replacement Factory 7-Way Connector For 2004 Ford E-450 Box Truck
    The replacement for your factory 7-way on your 2004 Ford E-450 Box Truck is the Tekonsha Replacement Multi-Tow 7-Way & 4 Pole Trailer Connector, # 74682. This will give you a 7-way and 4-way connection with a simple factory socket the industry calls the U.S. Car Type Connector. There is no splicing needed. I've attached a review and an install video for you. The Tow Ready Replacement Wiring you mentioned, # 118243, was for up to 2001 models with only the 4-way factory connector.
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  • 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...
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  • Trailer Running Lights are Not Working
    There are a few things that could be causing the problem with the trailer side running lights. To determine if the issue is on the vehicle or trailer side you will start by testing the vehicle side trailer connector using a circuit tester such as # PTW2992. I have included a couple of links to the right that explain how to test. The issue could also be on the trailer side. Most likely it would be a damaged wire or a bad ground. Ground problems normally show up when there is more draw...
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  • Ford OEM Connector With Bare Trailer Wiring For 2001 F-350 Dually For Custom Install
    For your 2001 Ford F-350 Dually, we don't have a bare wire kit with the gray OEM harness. I recommend using the 7-way # 20031 that is confirmed to fit and cutting the CAR adapter off the other end. This will give you the relays and fuses you need to make those wires function correctly as well. For a shorter length you can use # 118243. If you just need a 7 way connector, you can use # PK12-707E and connect the wires. If you need a wiring extension you can use # PK11-934. If you just...
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  • Turn Signals Not Working in 7-Way Trailer Connector on a 2002 Ford F-350
    On a trailer, the turn signals are on the same circuits as the brake lights. On a 7-Way trailer connector they would be the pins in the 9 oclock and 3 oclock positions. If you are not getting turn signal functions on those two pins, but you are getting brake lights, then that does indicate a possible blown fuse. But since you said the fuse is fine there could be a relay somewhere. The easiest way to find the locations of fuses/relays is to use the truck owners manual. On many trucks there...
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  • Why do I need to replace the 7-way on my 1999 Ford F-350?
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  • 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...
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  • Recommended 7 Way Plug For A 1999 Ford F-350 With Factory Wiring
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    Image 1 for
  • Installing A Brake Controller On A 2000 Holiday Rambler Admiral
    For your 2000 Holiday Rambler Admiral, I recommend the Tekonsha Prodigy P3 # 90195 brake controller. To install this, you can use the wiring harness # 3035-P. For most applications, the factory plug is located beneath the dash, near the center console. You may also need the Ford Replacement OEM Tow Package Wiring Harness, 7-Way (Super Duty) # 118243. If you don't have the ability to add a simple harness in your coach, you can use the circuit tester # PTW2993 to check for function....
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    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.
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    The brake controller install wiring of your van somehow is not wired correctly. Best option we have to get you on the road quickly is going to be to bypass all of the factory wiring and then hardwire the controller in. Most likely you can leave the power and ground wires of the controller connected to the factory wiring (black and white wires) but first try severing the red wire of the controller leaving enough room to reconnect it to see if the turn signal issue goes away. If so, then...
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  • 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...
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  • Replacement For Factory 7-Way Trailer Connector on 2003 Ford F-250
    Although the # 118243 shares the same rectangular plug located on the driver's side frame rail as later models, Tow Ready only confirms it as a fit for 1999-2001 Super Duty trucks while the # 118242 fits the 1997-2003 F150 and the 2004 F150 Heritage Series. I don't offer a confirmed fit for a 2003 F-250 that would provide a 7-way trailer connector that would plug into the existing rectangular connector. If possible, I'd recommend unplugging the 7-way connector from the harness that plugs...
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  • Parts Recommendation to Upgrade 4-Way of 1999 Ford Truck to 7-Way
    Yes, the Tow Ready Custom Fit Vehicle Wiring # 118243 is exactly what you need to convert the 4-way on your 1999 Ford truck to a 7-way and comes with everything needed.
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  • Troubleshooting a Weak Right Stop/Turn Signal Circuit in the Bed of a 2002 Ford Super Duty
    It very well could be a dirty connection or a short somewhere on the circuit. I would start at the back of the connector in the bed of your truck checking it for corrosion and then trace the circuit back checking for cut or exposed wire and fix as necessary. I do think its most likely corrosion either on the front of the connector, the back of the connector or where it connects to the 7-way at the bumper. I attached an FAQ article on trailer wiring that you might find informative also.
    view full answer...
  • No Trailer Brake or Turn Signals When Connected to 2012 Ford F-250 With Factory Tow Package
    Troubleshooting your brake and turn signal problem is easiest when you disconnect the trailer and test the truck and trailer individually. First, at the truck check all fuses and relays related to trailer/towing in the power distribution box. If these are all okay, then next apply a tester like # PTW2993 to your 7-way connector. You will want to test one circuit at a time while a helper activates each function on the vehicle. The linked photo shows you the function assignments on a typical...
    view full answer...
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