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Curt Universal Wiring Kit for Trailer Brake Controllers - 10 Gauge Wires

Curt Universal Wiring Kit for Trailer Brake Controllers - 10 Gauge Wires

Item # C51500
Our Price: $42.10
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This universal wiring kit lets you install a trailer brake controller (sold separately) in your vehicle. Designed for use on vehicles not equipped with factory tow packages. Installation requires 7-way trailer connector (sold separately). 1-800-940-8924 to order CURT accessories and parts part number C51500 or order online at Free expert support on all CURT products. Great prices and Fastest Shipping for Curt Universal Wiring Kit for Trailer Brake Controllers - 10 Gauge Wires. Accessories and Parts reviews from real customers.
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  • Reviews (20)
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CURT Accessories and Parts - C51500

  • Trailer Brake Controller
  • Installation Kits
  • CURT

This universal wiring kit lets you install a trailer brake controller (sold separately) in your vehicle. Designed for use on vehicles not equipped with factory tow packages. Installation requires 7-way trailer connector (sold separately).


  • Universal kit includes wiring and hardware required for installation of your trailer brake controller (sold separately)
    • Designed for use with vehicles that are not equipped with factory tow packages
    • 7-Way trailer connector (sold separately) required to complete installation
  • 10' Long duplex cable houses (2) 10-gauge wires
    • Black wire connects brake controller to car battery
    • White wire acts as ground
  • 20' Long, cross-linked, 10-gauge wire connects brake controller to 7-way trailer connector at rear of vehicle
  • 30-Amp circuit breaker protects your vehicle's electrical system by preventing overload
    • Provides protection for vehicles towing trailers that have up to 8 brake assemblies
  • Ring terminals attach to wires so you can connect leads to circuit breaker and battery posts
    • (2) #10 Ring terminals
    • (2) 3/8" Ring terminals
    • (2) 1/2" Ring terminals
  • 3 Butt connecters for joining wires
  • (8) 8-1/2" Long cable ties let you secure loose wires
  • Limited 1-year warranty

Curt Universal Brake Control Wiring Diagram

51500 Curt Univeral Brake Control Wiring Kit

Installation Details C51500 Installation instructions

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Curt Universal Wiring Kit for Trailer Brake Controllers - 10 Gauge Wires - C51500

Average Customer Rating:  4.3 out of 5 stars   (20 Customer Reviews)

This universal wiring kit lets you install a trailer brake controller (sold separately) in your vehicle. Designed for use on vehicles not equipped with factory tow packages. Installation requires 7-way trailer connector (sold separately).


Kit has everything I need to set up an electric brake controller on my 1992 W250. Installation instructions were clear and concise. Great product at a fair price.


I called e trailer to make sure I purchase the right wiring kit for my Ford E150.
The person on the phone spends 40 minutes with me to find out what I need. I explained my situation what parts I have and what I need. She ordered for me the parts. The Brakecontroller came and looks fine but this wiring kit she had send me does not work at all. the 10 gauge wire is to short. Ones again I Called Etrailer, and all I got as an answer is I can send it back or extend the wire. now I am stuck with a wiring kit for 40 something dollar what I have to extend and spend time to find the wire at a store. Very poor customer service and it looks like they don't know their product. I am very disappointed.

Etrailer Expert

Jenny N.


I will have our customer service team reach out to you.


This is not a review of the product.

service was excellent. Since I had been sent the wrong cabling etrailer was very helpful in getting me the information necessary for me to return the parts I did not and to make sure I obtained the proper product in a timely manner.

Good work and thanks - Alan

Alan W.


All is well with your equipment and the trailer it was installed on Nothing new to add*


etrailer products and service are excellent! With their helpful videos and staff (plus a little help from Curt Manufacturing and our teardrop trailer manufacturer (CampInn)) I was able to install electric brakes on the trailer, and a controller in my vehicle by myself. I had never installed electric brakes before. Everything works perfectly!


The wiring cable that is supposed to come from the back is not long enough, this product is misleading to be used to connect the brake controller.

Etrailer Expert

Patrick B.


It really depends on the vehicle the controller is being installed on, which is why we point out the length of each piece of wire in the description. 20 feet is enough for most SUVs and trucks, but a large cargo van or trucks with 4 doors and an 8 foot bed may need more.


The black/white bundled wire was not long enough for my 2015 Honda Fit, had to purchase another 8 feet to cover the length from back to front. Blue wire is longer and the instructions expect you will use it for the brake controller. This is certainly long enough at 20 ft but the 10ft wire is insufficient. Should have given you 20ft a piece for each.


Duplex wire isn't long enough for a 2022 Toyota Highlander. Save yourself the hassle I had and just spend the extra money on item # ETBC7. The connectors are cheap so upgrade those. You'll probably need more zip ties than included.


The quality of the wiring and connectors was very good. I experienced no problems with the connections or material. They functioned as intended and for the purpose I needed.


Excellent company.
shipping was FAST!

and everything that was shipped was exactly as I ordered it.
everything worked and hooked up great.
Also they have great resources, such as wiring diagrams and install vids to help with assembly!
I strongly recommend this company for anyone doing work on their own trailer.


product arrived quickly and was just what it said it was; and just what I needed to wire in my brake controller. Worked great.


Great product and you can't beat's prices and fast shipping.


Great kit for electric brake install!




It worked out great, installation was easy , and with the kit it was all I needed to make the installation a success


Works great and includes all necessary parts. Thanks


Still works great and was easy to insta ll.


This iteam worked great


Thanks for fast response. Awesome! I am travelling but happy that's waiting for me home. Great day!


Worked well




See what our Experts say about this CURT Accessories and Parts

  • What Parts Do I Need To Upgrade My 4 Flat To A 7 Way Connector And Use A Wireless Brake Controller?
    It sounds like you are definitely on the right track here. You would plug the Adapter # C57672 into the existing 4 flat plug. Then the Kit # C51500 contains the rest of the wires you will need to run to upgrade to a 7 way. From there you will be ready to plug in and use a wireless brake controller like the # C51180. Since the Curt echo works off of the vehicles brake lights, technically you would only need to connect the 12v wire to the 7 way plug in order to use it. The additional wires...
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  • Compatible Tow Wiring and Brake Controller for 2013 Toyota Highlander
    The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118449 is a great fit for your 2013 Toyota Highlander. Then you can use the Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps # C57674 you referenced along with the Wiring Kit # C51500. This will work with the Curt Echo # C51180 you referenced. The Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # 13534 is a custom fit for your vehicle so these parts all will work well but I also recommend using the # 18140...
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  • How To Install Electric Trailer Brake Controller On 2020 Ford Transit T350
    I do have trailer brake controller options for a 2020 Ford Transit T350 but there are no trailer brake controller wiring provisions. Therefore, you must hardwire the controller which involves running wires from the battery to the cab and then from the cab to the trailer connector. We offer kits for this exact purpose like the Curt Universal Wiring Kit for Trailer Brake Controllers part # C51500. This will then allow you to install any standard trailer brake controller like the Redarc Tow-Pro...
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  • Curt Brake Controller Wiring C51500 vs. DrawTite 5506 for Wiring Up Brake Controller
    You are on the right track for installing your brake controller in your 2008 Jeep Grand Cherokee. The part # 5506 does include more than you would need if you aren't making the 12 volt circuit complete so instead the Curt part # C51500 would be all that you need. The # 5506 would be the kit to use if you needed the 12 volt circuit.
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  • How to Install the Tekonsha Prodigy P3 Brake Controller on a 2017 Audi Q7
    Since you said that your hitch, drawbar, and 7-Way connector were all factory installed the best scenario would be if there was some wiring under the driver's side dash of your 2017 Audi Q7 that you simply splice the 4 wires of the Tekonsha Prodigy P3 # 90195 to. If this is the case, you will simply splice the following colors to the correct functions: White - Ground Black - 12V Power Red - COLD Side of Stop Light Switch (only gets hot when brake is pressed) Blue - Brake Controller Signal...
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  • Brake Controller Recommendation for a 2014 Jeep Wrangler Unlimited Towing Offroad Trailer
    For a brake controller for your 2014 Jeep Wrangler Unlimited you have a couple options for towing your off road trailer. If the majority of the roads you plan on traveling will be similar to most public roads I would go with a proportional brake controller. The one I would recommend would be the Prodigy P2 # 90885. This controller has the most flexibility in how it can be mounted. If the majority of the areas you plan on taking your trailer will be slow speed areas with odd angles then...
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  • Brake Controller and Install Kit Recommendation for 2016 Subaru Outback Wagon with 7-Way
    Since you already have a 7-way on your 2016 Subaru Outback wagon the correct brake controller install kit you would need is the part # C51500 as it is basically the ETBC7 without the 7-way. This comes with the wiring for the controller to power it and connect it to the 7-way. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake...
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  • Parts Needed To Wire Redarc Trailer Brake Controller To a 2010 Nissan Xterra
    To install the Redarc Tow-Pro Liberty Brake Controller # RED24FR in your 2010 Nissan Xterra you will first need to determine how the 7-way connector that you have on your vehicle is wired. If it connects to the factory connectors already on the back of your Xterra like the T-One Vehicle Wiring Harness # 118266, then you will only need the Plug-and-Play Wiring Harness # RED39FR. For a universal style 7-way that does not connect to the factory connectors you will either need to replace...
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  • Ready to Tow Setup For 2009 Jeep Wrangler Unlimited
    To be able to tow the trailer with a 7-way connector you are right that you will need to install a 4-way connector first if your 2009 Jeep Wrangler Unlimited does not come with a factory tow package. The Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # HM42635 will plug into your factory harness in your Jeep without factory tow package. The Curt Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat # C57672 will be able to plug into your newly...
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  • What Parts Do I Need To Install A Curt Spectrum Brake Controller On 2019 Toyota Tacoma
    The Curt Spectrum Trailer Brake Controller - 1 to 4 Axles - Proportional - Dash Mount, part # C51170, is compatible with your 2019 Toyota Tacoma. In order to install it you will need a wiring adapter kit. The Curt Custom Wiring Adapter for Trailer Brake Controllers - Dual Plug In, part # C51455, is a custom fit for your vehicle. I have included product description links, a video demo link, and a video review link below.
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  • Can I Run the Wiring of My 7-way on the Inside of My 2018 Jeep JK Unlimited Rubicon
    There really shouldn't be any issue running the Curt Universal Wiring Kit for Trailer Brake Controllers - 10 Gauge Wires # C51500 through the interior of your 2018 Jeep JK Unlimited Rubicon to wire your 7-way trailer connector. You will want to ensure that you keep the wiring away from any moving parts (like hinges and door) to make sure the wires do not get damage. One last thing keep in mind, it will take more wire to run it through the interior rather than under your Jeep. I would keep...
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  • Troubleshooting No Power to Curt Assure Brake Controller Connected to 2021 Jayco Motorhome
    To troubleshoot the Curt Assure Brake Controller # C49UR and Wiring Harness # C51432 on your 2021 Ford E-450 I recommend checking the pin on your vehicle-side connector that matches with the pin on the wiring adapter with the black wire, as this is the color wire that carriers the 12V power from the battery. If the pin on your vehicle-side connector doesn't have 12V power then that means something on your vehicle wiring is bad, but if you see 12V power there then that means the wiring...
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  • Recommended Brake Controller And Wiring For 1995 Toyota T100 Pickup Truck
    Since you have no brake controller port on your T100 truck you will need to hardwire the brake controller. Your truck has separate wiring so you can use a circuit tester like part # PTW2993 to find a wire that shows power only when the brake pedal is pressed. Many times, the wires are run along the driver side under the door threshold. The brake controller I recommend is the Prodigy P2, part # 90885. This is our most popular because it is easy to install and operate. There are 4 wires...
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  • Circuit Breaker In Curt Universal Brake Controller Wiring Kit Is Making Noise
    I called my contact at Curt and they told me you should never hear the circuit breaker resetting for a couple reasons. The breaker would only reset if there is an excessive draw on the system causing it to reset. I would check to make sure it is secured close to the battery as the instructions state and that all of the wiring is secured in place and there is no other draw on the system. My contact said they have not had anyone complain that the circuit breaker is making any noise. If...
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  • Completing Brake Controller Output Circuit on a 1998 Dodge Ram
    The easiest way to install your brake controller is going to be to run the blue wire of the controller back to the 7-way with ten gauge wire like our part # 10-1-1 (sold by the foot). Trying to track down factory wiring on the older Dodge trucks can be a bit of a headache and this will bypass all of this. Or you could use just the # C51500 that comes with the wiring you would need to hardwire the brake controller to your vehicle. This comes with power and ground wires for the controller,...
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  • Wire and Breaker Recommendation to Complete 12 volt Power Circuit on a 2006 Ford Explorer
    The Curt Universal Wiring Kit for Trailer Brake Controllers # C51500 that you referenced comes with all the wiring to install a brake controller, but if you want to complete the 12 volt power circuit on the 7-way you will need to also purchase a 40 amp breaker like part # 9510 and then 10 gauge wire part # 10-1-1. The # 10-1-1 is sold by the food so you would need to order a quantity of how many feet you would need. I would order longer than you think you will need just to be safe.
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  • Troubleshooting Curt Venturer Trailer Brake Controller on 2002 Chevrolet Silverado
    It sounds like the wiring harness under the dash of your 2002 Chevrolet Silverado does not have power running to it. To test this, use a circuit tester like # PTW2993 to check the connector. If this is the problem, you will need a Universal Wiring Kit for Brake Controllers # C51500. The install instructions are attached. You'll also need to modify the factory harness in your truck a bit. On the factory harness cut the battery wire leading to the factory connector leaving enough room...
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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B

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