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  1. Tow Bar Wiring
  2. Blue Ox
  3. Wiring Harness
  4. Plugs into Vehicle Wiring
  5. Custom
  6. Tail Light Mount
Blue Ox Tow Bar Wiring Kit

Blue Ox Tow Bar Wiring Kit

Item # BLU79FR
Our Price: $108.86
You Save: $52.84
Tow Bar Wiring
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Shipping Weight: 1.61 lbs
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Connect your towed vehicle's lighting system to your RV's to get the brake lights required for towing. Great Prices for the best tow bar wiring from Blue Ox. Blue Ox Tow Bar Wiring Kit part number BLU79FR can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (90)
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  • Videos (1)
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Blue Ox Tow Bar Wiring - BLU79FR

  • Wiring Harness
  • Plugs into Vehicle Wiring
  • Custom
  • Tail Light Mount
  • Blue Ox

Connect your towed vehicle's lighting system to your RV's to get the brake lights required for towing.


  • Connects your RV's tail, brake and turn signal lights to your towed vehicle's light system
  • Includes all necessary components and detailed instructions
    • No cutting or splicing required - plugs into factory connections
  • Made in the USA
  • 1-Year warranty

BX88368 BlueOx EZ Light Wiring Harness for Towed Vehicles

Installation Details BLU79FR Installation instructions

Video of Blue Ox Tow Bar Wiring Kit

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

Video Transcript for Review of Blue Ox Tow Bar Wiring - Bypasses Jeep Vehicle Wiring - BLU79FR

Hey everybody, I'm Ellen here at, and we're going to take a quick look at the Blue Ox tow bar wiring kit. This is going to be a basic kit to get that wiring function for flat towing your vehicle behind your RV. It allows you to transfer the lighting signal from your RV, into your vehicle. So, you'll have your running lights, tail lights, and your brake light signal going into your towed vehicle, so the drivers can see what's going on whenever you're making those signals, and it's going to keep you safe and compliant, while you're out on the road, flat towing with your vehicle. The nice thing about this kit, is that it is custom fit, so you're not changing anything about your vehicle's wiring. You're not cutting or splicing into anything.

This is just going to work with factory plugs, plug and play application. Should be pretty straightforward to get installed.You also don't have to worry about putting in individual diodes, which can be really cumbersome for other permit mount kits. That's something that I really like about this as well, is that it's pretty easy to get installed, and should make a great addition to your flat tow set up. So, let's take a little closer look, and talk about what this fits. So, we have our diodes here.

This is the brains of the operation. This is going to be what separates our vehicle, or isolates it from our RV's wiring. We don't have to worry about any back feed going from one end to other. We'll have our four-pole connection to go at the front of our vehicle. Now this, you might need to end up cutting off.

This is a basic wiring function, or a basic wire set up. Some RVs will still use the four-pole, but a lot have moved on to a seven pole.So, what you'll do is cut off this end, save the white wire, and then plug it up, or wire it into a seven pole plug, or whatever matches your RV. It might be something else like a six pole, or a five pole. You can find all kinds of accessories, and different plugs here at, if you need to go that route. Should be a good length of wire to go for your vehicle.

We'll have our two wiring plugs that are going to just run right in line with our taillight wiring. One goes on the driver's side, the other one goes on the passenger side and this kit is a custom fit for the 2020 through the current Jeep Gladiator, and the 2018, through the current Jeep Wrangler. That's with, or without the tow package, so it's just going to match right in line with those plugs, and plug right in.We do get some hardware to go with this. We'll have some zip ties, we can cinch up all our wires, make sure that there's nothing hanging down. Everything's anchored off nice and neat. We want to make sure any wire that's going to be going underneath the vehicle, you keep it away from anything hot, like your exhaust, or anything moving, like your suspension, and anchored off in several places, so there's no excess dragging. We'll get some dielectric grease, always a good idea to put those that on any of your connectors. Just needs a little dab, and we'll also get a dust cap and a bracket for that four-pole, if you do end up using it, and also some mounting hardware for that bracket. So, that's pretty much all that comes in the kit. It is made in the USA, and that's pretty much all we have to look at with this video.I hope this has been helpful in deciding if this is the right part for you. As well, you want to look at our website here at for any other accessories for your flat tow set up, since this is just one of the main components for a complete flat tow setup. You'll also want to get your tow bar, base plate, and your safety chains, if you don't already have them included with the tow bar, and also a supplemental braking system. You can find all of those accessories and more right here at, along with a lot of other content, to make sure that you can get it installed, and get everything right the first time. So, check it out. Thanks for watching.

Customer Satisfaction Score:

Customer Reviews

Blue Ox Tow Bar Wiring Kit - BLU79FR

Average Customer Rating:  4.7 out of 5 stars   (90 Customer Reviews)

Connect your towed vehicle's lighting system to your RV's to get the brake lights required for towing.


This is second wiring harness purchased from Etrailer. They work perfectly on our Jeep Gladiator and Wrangler 4XE!


Quality harness. Easy to install. You can make it as easy or hard as you want to as far as running the harness to the front of the vehicle. I chose to run it through the interior, under the carpet and door jams of my Jeep Wrangler. Pretty easy to do...took about 90 minutes total. Lights work perfect!


The powder coating on the Blue Ox Base plate came off upon the firt time I inserted the pins to tow it.


Was supposed to be a plug and play kit. Was the wrong type of plug for the year and model purchased. Was supposed to leave on a trip in a few days after it arrived and tried to make it work but it didn’t work at all. Very disappointed

What vehicle do you have? The harness is a fit for a 2020-2022 Jeep Gladiator.
-- Etrailer Expert Mike L - 10/08/2022


Great wiring setup for towing. Fast and easy install. Love doing business with etrailer.


I like the ease of installation. Just wish it included the round electrical connector that the blue ox toe vehical has.the video i saw and instructions together made it an easy do it yourself install.


Never having to flat tow a vehicle presented a problem for me to get it set up properly. I was thoughtfully guided through the purchase of the tow hitch, wiring, tow bar connection and safety required in installation. Great service!


The wiring harness worked perfectly for the 2022 Jeep Gladiator Sport, and plugged right into the Brakebuddy Stealth harness at the front connectors. The wire harness was run the length of the vehicle through the inside of the frame, fully protecting it and making for a clean installation. Watching a couple of videos on installing these helped a lot.


Very easy to install! It is literally plug and play. Depending on how detailed you want to get with routing your wiring dictates the level of complication on the product. The 2020 Wrangler tail lights are easy to remove and plugging in the wires from the kit is self explanatory. The converter box that comes in the kit does not have two sided tape on it as the instructions say. There are two tabs on either side of the box that allow you to zip-tie it. Not many options for that on the 2020 Wrangler so I zip tied it onto the filler neck for the fuel tank.

I wanted a clean install from the tail light housing to the front of the Jeep so I spent a good amount of time threading the wires across frame rails in the back and down frame itself using split tubing so that no wires were hanging down or noticeable. This took considerably more time than the installation of the kit itself. If I would have been satisfied just running the wires along the frame without consideration for a clean install, it would have been ready to tow in less than an hour.

I highly recommend this kit over the some of the others that require diodes or switches to toggle between tow and no tow mode.


Blue Ox is the best product for flat towing a vehicle


Worked great for a year. Now I’m having problems with the signal lights not working. I plan on taking the unit apart at the rear lights and cleaning and retighten the adapters


Not a happy camper…. I was sent the wrong part. Then I was asked by customer support to send pictures and descriptions of what was received in order to get a refund. I got only a partial refund because I was charged for the shipping. I have also emailed the customer service (Danielle) 2 times with no reply.

I will have our customer service team reach out to you. This harness is meant to be a fit for 2020-2021 Jeep Gladiator without the tow package and 2018-2021 Jeep wranger JL with the tow package.
-- Etrailer Expert Jenny N - 04/20/2022


No brainer to install and works perfectly on each tow hookup.


The install was easy. Hopefully the diodes hold up. I have been told that they don't last long.


Worked as advertised


Wiring worked well, would have like instructions to be included.


Customer service was excellent. Knowledgeable on products. And shipping with UPS was perfect.


I ordered a wire harness for my 2020 Jeep Wrangler tow vehicle and it came very quickly and installed easily in about 45 minutes. I’m very pleased with my experience with etrailer and will use them for future projects


Easy install,


great experience with E-trailer


First off let me say this is not my first order from etrailer. Previous orders have been very smooth with timely delivery and quality product with excellent customer service from available Technicians to help out with issues pertaining to installation. This current order arrived with the major component missing (baseplate). etrailer has stepped up and is currently doing battle with UPS. Thanks to Nicole R. for all of your attention to this matter. I will continue to do business with this upstanding company in the future. Merry Christmas!


Excellent product. Fast delivery. Easy install. Works as advertised!


Simple install!!


Does not work with the factory lane departure warning system


Very helpful staff and great prices. Shipping was super fast and items arrived well packaged. Website is terrific alerting you if the particular item you are viewing will fit your vehicle. Move over [online] I have a new partner.

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Mike S
Written by:
Mike S
Employee Noah M
Updated by:
Noah M
Employee Manda E
Updated by:
Manda E

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