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  1. Flat Tow Wiring Harness
  2. Blue Ox
  3. Extension Cord
  4. Plugs into Vehicle Wiring
  5. 4 Round
  6. Universal Fit
Blue Ox 4-Wire, Coiled Electrical Cord with 4-Way, Round Plugs
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Blue Ox

Blue Ox 4-Wire, Coiled Electrical Cord with 4-Way, Round Plugs

Part Number: BX8861
In Stock
$76.84
Retail:$110.00
You Save: 30%
Flat Tow Wiring Harness
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Quickly and easily connect your towed vehicle to your RV with this durable, insulated electrical cable. Includes 4-way, round RV and vehicle plugs. 1-800-940-8924 to order Blue Ox flat tow wiring harness part number BX8861 or order online at etrailer.com. Free expert support on all Blue Ox products. Great prices and Fastest Shipping for Blue Ox 4-Wire, Coiled Electrical Cord with 4-Way, Round Plugs. Flat Tow Wiring Harness reviews from real customers.
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  • Reviews (32)
  • Q & A (0)
  • Videos (1)
  • Photos

Blue Ox Flat Tow Wiring Harness - BX8861

  • Extension Cord
  • Plugs into Vehicle Wiring
  • 4 Round
  • Blue Ox
  • Universal Fit

Quickly and easily connect your towed vehicle to your RV with this durable, insulated electrical cable. Includes 4-way, round RV and vehicle plugs.


Features:

  • 4-Wire extension cord can be used for multiple towing applications
    • Perfect for running power from your RV to your towed vehicle
  • Included 4-way, round, female plugs mount to RV and towed vehicle for quick, easy hookup
  • Coiled cable can expand to 7', yet still contracts to prevent dragging and tangling
  • Silicone-encased wire connections prevent corrosion
    • Constructed of 16-gauge wire
      • Ground wire is 12-gauge
  • Made in USA
  • 1-Year warranty


BX8861 Blue Ox Coiled Electrical Cable with Plugs - 4 Wire





Video of Blue Ox 4-Wire, Coiled Electrical Cord with 4-Way, Round Plugs
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Blue Ox Flat Tow Wiring Harness - Plugs into Vehicle Wiring - BX8861

Hello, everybody. Steven here with etrailer.com. Today we're looking together at our Blue Ox four wire coiled electric cord with a four-way round plug on both ends. That's right, folks, so this four wire extension cord is gonna be used for multiple towing applications. Primarily it's gonna be perfect for running power from your RV to that tow vehicle that you're flat towing. You're gonna get two round four-way connectors on both ends of this plug and then you're gonna get two of the metallic ports here that those would mate up to.

So spring loaded lid. You got a notch up here on top of the plug that marries up inside once you plug this in and that kinda latches itself in place so now you can't physically unplug that unless you lift the lid, and then it allows you to unplug it. So very nice feature that they're done with Blue Ox here. The cable itself is coiled. It can stretch up to an impressive seven feet, yet still contracts back to its original size, so it's gonna prevent dragging, tangling, those kinda things.

It is a silicone encased wiring connector here that's gonna prevent corrosion. They've really done a really great job here of keeping everything waterproof and everything. You simply undo the screw here on the back. That's how you would wire up on the vehicle side and on the RV side upon installation. Well, folks, that's gonna do it for our quick look at this Blue Ox four wire coiled extension electrical cord for your four-way round plugs.

I'm Steven. Thanks so much for watching and have a great day.

Customer Satisfaction Score:

Ratings & Reviews

4.8

32 reviews
5 Stars
(28)
4 Stars
(3)
3 Stars
(1)
2 Stars
(0)
1 Star
(0)
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by:
We originally bought this product over two years ago from etrailer and we were happy with its performance. We did some annual maintenance on the tow bar so we decided to buy a new coil. We bought the second coil via [online retailer] (same manufacturer) and within a few days of using it we noticed it did not perform the same as our original purchase. We sent it back and reordered it from etrailer and we are again very happy with it.
by:
I put this base plate on with the assistance of my wife very easy to install. Do recommend the video to install
by:
Thank you for your help n direction to proceed
by:
Replacement electrical cord to replace our existing wiring between car and motorhome that has seen all kinds of extreme weather during the last 10+ years. The outer jacket started to crack, but still works. Makes connection to our Brake Master towing system quick and easy.
by:
Not what i thought. Ends on the blue ox are a lot smaller than the ones on my truck and rv. So they will not fit without changing both plug ends on the truck and rv. That is what i was trying to avoid. Sorry I will have to return.
by:
It was exactly what we needed and wanted.
Thanks for shipping it fast.
by:
Very good service, needed part replaced no hassle received replacement part very quickly. will continue to do business and recommend others to consider to check you out.
by:
It is an exact replacement of what I currently have which will make installation easy
by:
Super fast shipper. Donna was so helpful and walked us thru deciding on the correct part. Very patient and pleasant customer service. I work in a call center and this person was what all companies should have for the person that is the first contact. Will certainly shop again
Thank you so very much!
by:
I had no problems placing and receiving the order...and it even arrived two days early! I have ordered this product at least two other times with the same awesome customer service.
by:
Great product works great just what I needed for my toad
Frank profile picture

Frank

8/16/2023

Still working and looks great after thousands of miles of use.

by:
Very nice pigtail wire and plugs
by:
This is a great kit to add rear lights to a Ford Focus because you have to remove the negative battery cable for towing. There is more then enough wire to complete the job of wiring the lights from the rear of the car to the front for a permanent installation.
by:
easy to install and works great
by:
Secure with lights still working great.
by:
As always etrailer delivered exactly what I wanted. Thanks
by:
Good quality, worked great.
by:
The picture and description helped me decide that this is what I needed
by:
Product was as described on the website and was delivered promptly.
by:
Great service , Bill was knowledgeable , exact part ordered , Thank You John Clark
by:
Quality is excellant as was your service
by:
Works fine, exactly what I ordered and received it in a timely manner. Very happy
by:
seems ok have not had the chance to use it yet.
by:
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See what our Experts say about this Blue Ox Flat Tow Wiring Harness

  • Wiring Diagram For Blue Ox 4-Wire Electrical Cord With Round Plugs
    I have attached a photo of a typical 4-way round connector with the pins labeled you can check out. The photo has both the trailer side and vehicle connectors labeled.
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  • Items Needed to Flat Tow 2013 GMC Sierra 1500 4x4 Behind Motorhome
    Flat towing a vehicle behind a motorhome, one such as your 2013 GMC Sierra 1500 4x4, does require a number of components, all of which are detailed in the linked overview article on flat towing. I also included articles on braking systems and hitch adapters, both of which are required items. The items include a tow bar, safety cables, a wiring/lighting kit of some type, a wiring umbilical and a braking system and base plates on the dinghy. Roadmaster base plate kit # 3154-3 is a confirmed...
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  • Parts Needed to Flat Tow 2009 Mini Cooper S
    There are 5 items needed when flat-towing your Mini. You will need base plates, a tow bar, safety cables, lighting for the towed vehicle, and a supplemental brake system. If your Mini is not the John Cooper model the base plates I recommend are part # BX1307. The tow bar I recommend is the Blue Ox Alpha, part # BX7380. The safety cables are included with the tow bar. For tow bar wiring I recommend part # BX8869. To connect the wiring to the motorhome we offer a couple options. You...
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  • Parts Needed to Flat Tow a 1996 Chevy C/K Series Pickup Truck Behind a Motor Home
    I am glad you emailed us because there are some things that you need to be aware of. First, the Tow Ready tow bar, # 63180 is only rated for 5,000 pounds and your 1996 Chevy Silverado could easily exceed this capacity. The other problem with the tow bar is that it is only rated for a maximum speed of 45 miles per hour. We need to get you a proper set up. The first thing you are going to want to do is consult the truck owners manual to determine if it can be flat towed and if so what special...
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  • Parts Needed to Flat Tow a 2004 Mini Cooper S Behind a Motor Home
    Please check the owner manuals or contact the manufacturers and ensure that your 2004 Mini Cooper can be towed, and make sure that the vehicle that you are planning to tow this car with can tow it. According to my research I have found that the 2004 Mini Cooper manual transmission option of your vehicle is considered flat tow-able. However, I was not able to find specific information regarding an automatic transmission version of this vehicle. Please make sure that you check your vehicle...
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  • Parts Needed to Equip 2003 Volkswagen Jetta for Flat Towing Behind Motorhome
    For the 2003 Jetta Wagon we offer no base plates for flat towing but we do have them for the 2003 VW Jetta sedan. The Blue Ox base plates that fit the car are part # BX3827. These are fully compatible with the Alpha Tow Bar # BX7380. Safe and legal flat towing requires a number of other components too, including safety cables (which come with the Aladdin), a wiring/lighting kit and a braking system for the towed car. Also a high/low hitch adapter is often needed to keep the connected...
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  • Recommended Components For Flat-Towing 2013 Hyundai Elantra With Motorhome
    To flat-tow your Hyundai Elantra behind your motorhome you will need 5 items. You will need base plates, a tow bar, safety cables, lighting for the Elantra, and most states now require a supplemental brake system. If your Elantra is not a GT the Blue Ox base plates, part # BX2331 would work well. The tow bar that would also work well is the Blue Ox Alpha Tow Bar, part # BX7380. This tow bar is designed with a motor home mount and will work well with the BX2331 base plates. This tow bar...
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  • Can a 2000 Ford Ranger Manual Transmission and Rear Wheel Drive be Towed with a TowReady Tow Bar
    Yes, the Tow Ready Adjustable Tow Bar, # 63180, can be used to tow the 2000 Ford Ranger with manual transmission. You will need to refer to your owners manual for procedures and restrictions for towing your Ranger, and make sure that the Ranger is below the 5,000 pound capacity of the tow bar. You will also have to keep in mind that this tow bar is rated for towing speeds of 45 miles per hour or less. A better tow bar option would be the Blue Ox Adventurer Tow Bar, # BX7322, which is...
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  • Blue Ox Parts Needed to Flat Tow 2006 Jeep Wrangler Behind RV
    We can help you with choosing the components needed for safe and legal flat towing of your 2006 Jeep Wrangler behind your RV. A good starting point is the linked article that covers the essentials of flat towing. Additional articles on specific items, wiring kits, high/low adapters and braking systems, are also included. Our installers do tend to prefer the Blue Ox flat towing items for their consistently clean installation. We can start with the base plates needed for the Wrangler. Blue...
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  • Tow Bar and Base Plate Kit Recommendation for Flat Towing a 2006 Toyota Tundra
    For flat towing your 2006 Toyota Tundra, with the RoadMaster Blackhawk 2 All Terrain Tow Bar, item # RM-422, I recommend Roadmaster base plates, # 1154-1. You will also need a set of safety cables, item # RM-645, and lighting for the Tundra when being towed. I would recommend using the RoadMaster Tail Light Wiring Kit with Bulbs, item # RM-155, to keep the lighting from the tow vehicle totally separate from the wiring on your Tundra. The Blue Ox Wiring kit for your Tundra is the Blue...
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  • Parts Needed to Flat Tow a 2005 Chevy Cobalt Behind a Motor Home
    First, according to the research I did, the 2005 Chevy Cobalt is flat towable. Consult the vehicle owners manual to confirm. There are a total of 5 items you will need to flat tow a vehicle: base plates, tow bar, safety cables, lighting, and supplemental braking. Base plates: These provide a proper and secure attachment point on the vehicle for a tow bar. You can use Roadmaster EZ base plates # 523137-1. These will fit models with grille inserts but none of the base plates we carry will...
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  • Supplemental Flat Towing Equipment and Braking System for Air-Brake Equipped Motorhome Towing F350
    To safely tow your truck, you'll need a base plate, tow bar, safety cables, a wiring solution to ensure the truck taillights work in conjunction with the coach and a supplemental braking system. I'd recommend the Blue Ox # BX2163 base plate kit and the Blue Ox Avail tow bar, part # BX7420. The Avail is rated for vehicles weighing up to 10,000 lbs, which should be fine for your F350. To wire the taillights of the truck, I'd recommend a bulb and socket kit like part # BX8869. You'll also...
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  • Parts Needed to Flat Tow a 2013 Honda Fit Sport Automatic Behind a Motor Home
    The best place to check to see if a vehicle can be flat towed behind a motor home is the owners manual. I found one online for the 2013 Fit from Honda and it states that you can tow the vehicle behind a motor home. There are special instructions for the automatic transmission you will want to look at so be sure to check your owners manual. You will need 5 items to flat tow your fit. First you will need base plates, # BX2253. These provide a safe mounting location for a tow bar. For a compatible...
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  • Parts Needed When Flat Towing A 2014 Ford Focus Behind RV
    In order to flat tow your 2014 Ford Focus, you will need several items. Most tow systems require some sort of hitch accessory to either raise or lower the tow bar to the appropriate height. The safe zone for a motor-home-mounted tow bar ranges from 3 inches above or below level. RoadMaster high-low adapters will provide you with the necessary drop. Simply flip the adapter over to achieve the desired level. I have linked you to a product page for high-low adapters. One of the first things...
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  • Tow Bar Wiring to Flat Tow a 2008 Honda Element Behind a Motor Home
    We actually don't carry any flat tow wiring for your 2008 Honda Element that plugs directly into the vehicle's wiring. We used to but it's been discontinued. What is in the instructions for the base plates is just the connector that would be at the front of the vehicle and for that you can use # DM9523004. You would need to cut off the 4-Way end from kit # TM783101 and attach the wires to the back of one of the connectors in this kit. White is ground, brown is running lights, yellow is...
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    When your Silverado 3500 owner's manual refers to the transfer case and its neutral position this refers not to the column shifter but to either a floor-mounted manual shifter or to the dash-mounted electronic transfer case control knob. Both will have 4WD high and low settings indicated by up or down arrows and both will have a neutral position. Flat towing a vehicle like your Silverado 3500 requires a number of components, all of which are outlined in the linked article. These include...
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  • Parts Needed to Flat Tow 1998 Jeep Cherokee Behind RV
    Yes, the same part numbers you found for flat towing a Jeep Cherokee would be what you'd need for your 1998 Jeep Cherokee as well. Here's the same list of parts: Blue Ox Base Plate Kit, # BX1117 Blue Ox Alpha Tow Bar, # BX7380 Blue Ox Tail Light Wiring Kit, # BX8869 Blue Ox 4-Wire, Coiled Electrical Cord, # BX8861 Blue Ox Patriot Braking System, # BLU37TR
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  • Needed Tow Bar and Accessories to Flat Tow 2007 Jeep Liberty
    In order to flat tow your Liberty, you will need to install a base plate kit. I would recommend the Roadmaster EZ4 Base Plate Kit, part # RM-521423-4. A base plate offers a safe and secure attachment point to the vehicle. This particular Roadmaster kit offers easily-removable drawbars. One they are removed, the bracketry is pretty much invisible. If you are mechanically inclined, you might be able to handle the installation, but it is fairly involved. Typically, an RV would have a receiver...
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  • Can a Roadmaster Stowmaster Tow Bar be Adapted to Fit Blue Ox Base Plates on a 2002 Volkswagen Jetta
    The adapters # RM-031 and # RM-031-5 do not fit the Stowmaster tow bars. The Blue Ox base plates for the 2002 VW Jetta, # BX3827, are designed for use with motor home mounted tow bars and not car mounted tow bars like the Stowmaster. If you like the Blue Ox base plates and want a used tow bar, then the compatible ones you should be looking for are the Blue Ox Aventa, Aladdin, Alpha and Allure tow bars. Motor home mount tow bars are actually the more secure and easier to use option than...
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  • Compatibility of RM-521559-4 with Roadmaster Falcon Tow Bar on 2009 Honda CR-V
    The discontinued Roadmaster # 5250 tow bar is compatible with EZ4 style base plates like the # RM-521559-4. In addition to the tow bar and base plates, you will also need safety cables, a lighting solution and a supplemental braking system (required by law in most states). If you prefer a coiled safety cable, the # RM-643 is a good choice. For a straight cable, I would recommend # RM-645. If you do not already have your CR-V wired, the Roadmaster Bulb and Socket Kit, part # RM-155 is...
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  • Parts Recommended to Flat Tow a 2012 Honda CR-V Behind a Motor Home
    First, you will want to consult the vehicle owners manual and/or Honda because in the research I did I found that Honda does not recommend flat towing the 2012 CR-V. The LX model may be the one exception but you will need to consult the vehicle owners manual to be sure. For base plates you can use # BX2258 that you have referenced. The compatible tow bars for this base plate set do mount to the RV receiver. These types of tow bars are preferred because they offer a better ride and performance....
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  • Can Trailer Wiring 118420 Be Used to Tow a 2010 Honda Fit and if Not What Parts are Needed
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  • Towing a 2007 Toyota Solara with a Chevy 3500 Pickup
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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
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Employee Steven C
Installed by:
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Employee Wilson B
Updated by:
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