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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Fifth Wheel and Gooseneck Wiring
  5. 7 Round - Blade
  6. 10 Feet Long
Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long

Item # C56000
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Custom Fit Vehicle Wiring

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Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C56000 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (127)
  • Q & A (0)
  • Photos
  • Why etrailer?

CURT Custom Fit Vehicle Wiring - C56000

  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • 7 Round - Blade
  • CURT
  • 10 Feet Long

Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.


  • Provides 7-way, blade-style connector in your truck bed for hassle-free hookup of 5th-wheel and gooseneck trailers
    • Connector mounts in truck-bed sidewall, tailgate post or wheel well
  • Retains factory 7-pole trailer connector at rear of truck (if present)
  • Plugs into factory wiring - no cutting or splicing
    • 10' Long, insulated wiring harness reaches from rear bumper to truck bed
    • Requires that truck have factory tow package
  • Custom fit for your vehicle
  • Includes zip-ties and self-tapping screws for installation


  • Harness length: 10'
  • Wire configuration:
    • Yellow: reverse lights
    • Green: tail lights
    • Brown: right turn and brake lights
    • Blue: electric brakes
    • Black: 12V battery charge
    • Red: left turn and brake lights
    • White: ground wire
  • Limited 1-year warranty

56000 CURT Fifth Wheel and Gooseneck OEM Extension Harness - 7-Way RV Blade Plug - 10' Long

Installation Details C56000 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 10' Long - C56000

Average Customer Rating:  4.9 out of 5 stars   (127 Customer Reviews)

Mount this 7-way, RV-style connector in your truck bed for quick, simple hookup of your 5th-wheel or gooseneck trailer. Custom harness plugs in-line with your existing factory wiring so that you can retain use of your vehicle's factory 7-pole.

2016 Ford F-350 Super Duty

This product makes it so simple to add a Fifth wheel plug into the bed. Installation takes maybe 20-30 minutes. I installed mine on the column at the tailgate so it is out of the way (less likely to get damaged by other cargo). The only issue I experienced with install was that due to the small opening in that column (from under the vehicle), I had to remove the gray wire cover and then reinstall it after feeding the wire harness up into the column. (This was minor) Would definitely recommend this as it is simply "plug n play" with no cutting of wires or crimping needed.

Product and location has worked perfectly and keeps on doing so. Great product!
Richard P - 08/31/2017

2014 Ford F-250 Super Duty

Very pleased with All product information and reviews help make decision very easy. Very quick delivery and installation instructions are very easy to follow. Purchased 5th wheel hitch and custom wiring extension for my 2014 F250.

Thanks for the follow up. I’ve enjoyed the products ease of installation and use. I easily hook up my 5th wheel camper by myself and have had no issues. Great products!
Mike S - 06/09/2018


It was exactly what I was looking for, perfect length this saved a lot of time.

2016 Chevrolet Silverado 2500

The cord made the electrical part of installing my new fith wheel hitch very easy just plug in the connections and your done .

The products have worked flawlessly no problems and thank you for checking back with me its nice when a company cares about there costumers. Next time I need any trailer products I will definitely be contacting etrailer.
Kevin L - 10/23/2017

2019 Ram 2500

This is an easy install and seems well made. I probably didn’t need the 10’ long my truck called for but no problem zip tying up out of the way. Well pleased.


Easy to Install with plenty of length to put anywhere almost in the bed of the truck! High Quality and love that it is a plug and play kit!


Super fast service

Marvin - 05/29/2022

1999 Ford F-250 and F-350 Super Duty

Product could be improved by having the two 7-pin connectors more widely apart. That would allow one to to keep more of the wiring harness up in the frame and not hanging down near the hitch. Everything else was fine.


Awesome product fit the truck just like it should and very easy to install keeps me from scratching the tailgate with a wire over the back of the truck easy to reach when hooking up trailer


Worked as designed. It was a little long but just zip tied the extra up under bed.


This wiring harness made adding a plug in the bed of the truck for the gooseneck trailer a breeze. I didn’t really need the 10’ harness but I just looped and zip tied the excess. One year later and the plug still works great.

2019 Dodge Ram Pickup

Works as advertised. This wiring harness is being used to connect from a 2019 Ram 3500 8' box to a slide in truck camper. I ran this harness across and then up through and over the drivers side wheel well to have the connector available in front of the wheel well and behind the fuel door. Plenty of space in the area between the box wall and truck wall without interfering with any of the fuel or breather lines.

2015 Ford F-250 Super Duty

Purchased this hitch, install kit, and wiring harness for a new to me 2015 F-250. After watching the installation video and reviewing the included instructions the install went smoothly. The only deviation from the instructions was instead of using a unibit to drill the 9/16" holes in the bed I used a Rotobroach hole cutter(the holes are cleaner and the bit does not drift. I hooked in to my fifth wheel for the first time on Saturday.


easy installation after removing the spare tire and buying the correct hole saw. Hardest part was drilling the hole and worry that came with it about possible incorrect position and possible bed damage but no problem, lot's of room on a '16 Ram. I mounted it where the factory plug would be installed at the left rear of the bed next to the tie-down,

2016 Honda Pilot

This was a great product, works exactly as advertised.

A couple of things to note for install on a newer (2011-2016) model truck:

1. The Diesel Exhaust Fluid reservoir/pump makes the driver-side part of the install a pain in the butt. Particularly drilling the holes in the bed for the tow-chain loops. You have to drill from the underside of the bed, however there is almost no clearance between the DEF setup and the bed. I had to use an air grinder (90 deg) with a shorty bit to drill a small pilot hole on the front hole, and then measure the distance and drill the rear hole from the top down (blind).

2. The frame clamp (u-bolt) on the driver-side needs to be smashed a bit with a hammer to get it into position to fully clamp down.

Last thing (not necessarily about late model Ford), it is almost impossible to get a torque wrench in to tighten the adapter plates to the actual hitch. I just put a 1/2" drive flex head on my air-gun and went to town.
Other than these things it installed pretty well...could have used a lift.

I'm a curt fan!

2016 GMC Sierra 2500

I am so glad that I purchased this extension and relocation unit. I installed this myself outside in my driveway in about an hour. Everything was there that I needed (other than the hole saw) to install. I haven't had a single electrical issue with this plug or my factory plug since installed. Looks great in the bed also.


Good product


Worked perfect. Unfortunately 1 yr later at the bumper location (where the splitter is installed) I don't have reverse lights on my trailer. They still work from the new mount in the box, just not from the bumper location. It's possible it never worked from the beginning, as I didn't have a trailer with reverse light at the time, but I do now and they don't work... I understand I'm just outside of the 1yr warranty period too. My fault for not checking right away.

2015 Ford F-250 Super Duty

Wow! I ordered the products on Monday night (after 7p.m CDT) and I had the items on my property Friday afternoon! Great shipping speed which is really order processing and getting the product out so UPS could deliver it.
I ordered the Curt A16, custom rails for my 2015 F250 and the Curt harness. All three items took me about 4 hours to install--mostly by myself. The install was easy, but I needed the tools that were listed in the videos--WHICH is one of the reasons I ordered from --the videos for installation and product research, not to mention free shipping. I researched the products for several months before ordering, no other site compares to educational product videos really helped me make a decision.
Tools that are needed or at least will help make this quicker--Hydraulic jack, safety jacks, impact wrench, Electric drill, 2 1/8" hole saw for the harness plate mount, 9/16" bit, tape measure, hammer, long straight screwdriver for tapping spacers into place, some good light, and an uninterrupted afternoon in your garage.
I am so glad I ordered from and would recommend all of these above products. THANK YOU!!!


Fast Ship, and quality products. Thank you.

2016 Ford F-350 Super Duty

I haven't installed it yet, however, I cut the inside bed wall in preparation for a spray-in bed liner before installing.
It looks just like the picture and description, arrived undamaged and ready for install. Great installation instructions!

Still using and I really like the hitch and other items I purchased a year ago. After installing the Curt fifth wheel hitch, Ive used it several times and I will be using it a bunch over rbe next several weeks. Easy to maintain and use.
Les - 11/01/2017


Have not installed it yet. I am having trouble finding any directions on line, I hope there are some in the box.

2020 Ram 2500

Thank you for your prompt service! Nice product and fit perfectly!

Working great!
John A - 11/14/2021


Customer service for product selection and order entry were excellent and focused on my interests and needs. The hitch, custom installation kit, and harness were shipped very quickly and arrived sooner than expected. Everything arrived in excellent condition. Assembly and installation instructions were very clear and specific, and I was able to assemble and install everything with no problems and in a very reasonable amount of time. Total cost was roughly half of what it would have been if I had purchased the products and had them installed by a dealer. I am very satisfied with my experience dealing with, and would highly recommend them to anyone shopping for towing products.

Awesome. The hitch has worked great. Very, Very happy with the purchase,delivery, installation which I did myself, and performance of the product.Thanks again,Ill be sure to refer anyone who needs products you offer to you.
Peter C - 10/23/2017


Totally impressed with etrailer, extremely happy with the whole shopping experience. Very user friendly website with plenty of "How To" assistance. Only recommendation I would have would be to wrap the heavy hitches a little better as mine arrived with the cardboard damaged and my hardware was loose in the box, fortunately everything was there. Would not hesitate to purchase from them again!! Thanks!!

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