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  1. Custom Fit Vehicle Wiring
  2. Hopkins
  3. Custom Fit
  4. Fifth Wheel and Gooseneck Wiring
  5. 7 Round - Blade
  6. 10 Feet Long
Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug

Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug

Item # HM40157
Our Price: $85.15
You Save: 24%
Custom Fit Vehicle Wiring

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Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree-angled connector fits into tight spaces. 1-800-496-5010 to order Hopkins custom fit vehicle wiring part number HM40157 or order online at Free expert support on all Hopkins products. Guaranteed Lowest Price and Fastest Shipping for Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (63)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM40157

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

Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree-angled connector fits into tight spaces.


  • Provides 7-way, blade-style connector in your truck bed for hassle-free hookup of 5th-wheel and gooseneck trailers
    • Connector head is designed with 90-degree angle so it fits into tight spaces in truck-bed side rails
    • Lid with oversize hinge opens 180 degrees for easy connection
  • Retains the use of the 7-pole connector at the rear of your truck
  • Installs quickly and easily - no cutting or splicing required
    • Plug T-connector into factory wiring and your vehicle's factory-installed 7-way connector
    • Run 10' long wiring harness from rear bumper to truck bed
  • Offers enhanced weatherproofing with internal seals, corrosion-resistant terminals and rubber-coated copper wiring
  • Constructed of extremely durable ABS plastic
  • Includes self-tapping screws, dielectric grease packet and nylon ties for installation


  • Harness length: 10'
  • Wire gauges:
    • Purple/green/yellow/brown: 16
    • Blue/red/white: 12
  • 3-Year limited warranty

This T-connector wiring harness uses your factory tow package to add a 7-way socket in your truck bed while also retaining the use of the 7-way at your vehicle's bumper. The harness plugs into the back of your 7-way at the bumper and also into your factory wiring. And it provides 10 feet of cord to run the second 7-way connector to your truck bed. Installing a second 7-way connector in your truck bed makes it easy to connect the 7-way plug from your fifth-wheel or gooseneck trailer.

40157 Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Way Blade Plug

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - HM40157

Average Customer Rating:  4.9 out of 5 stars   (63 Customer Reviews)

Mount this 7-way, RV-style connector in your truck bed to simplify hookup of your 5th-wheel or gooseneck trailer. Harness plugs into existing wiring and retains use of factory 7-pole at the bumper. 90-Degree-angled connector fits into tight spaces.

2001 Ford F-350 Super Duty

Installed this in my 2001 F350 dually to replace the one that came in the truck because the accessory wire didn't work, and the wiring had been spliced in, and was a mess.
The HM40157 went in easily. The plug-in connectors cleaned up the wiring nicely.

My daughter uses it to connect her horse trailer. She has not had any problems with it.
Gerry - 07/08/2018

2000 Ford F-250 and F-350 Super Duty

The installation of this item on my truck took a total 30 minutes. It was so easy that I could not believe the project was done. The package is so complete and that allowed me to place it right where I needed it to be in the truck box. Thank you for the service.

How why did you choose the location in the truck bed?Now that youve been using it in this location do you feel that this is still the best location???Thanks! David.
-- comment by: David B - 05/25/2015
Reason for this site used is because it fit well there was convenient and was out of the way. Also most factory installs are in that location for fifth wheels.
-- comment by: Ray W - 05/31/2015

Toyota Matrix

The most important issue when ordering this type of kit is the picture that shows the type of connectors for the vehicle wiring harness. My '99 SuperDuty had the connectors in this kit instead of the ones in the manufacturer's compatibility matrix. Remember some truck manufacturers do not always use the same parts for the entire model year. Be familiar with your vehicle and look at the parts carefully.

The kit was good quality and was very easy to install. Took less than 2 hours to install. Be sure that after you make the hole in your truck bed, clean up the sharp edges and paint the hole to prevent rust.

enjoy this kit, it provides for a real professional installation.


Exactly what I wanted - easy installation. Now, can someone find me a bomb proof pony for my Grandsons!


Everything fit together with the factory wiring harness, no splicing of wires!!


Nice east install

1999 Ford F-350 Super Duty

Excellent quality, easy installation too. 99 F350 DRW, long bed , plenty of wiring.

1999 Ford F-250 Super Duty

This harness worked great for my 1999 F-250. It was really pretty much plug and play.

Still working great!
Jake S - 08/16/2018

1999 Ford F-350 Super Duty

Product as described. Quick shipping.

2000 Ford F-250 and F-350 Super Duty

These harnesses are great have had a hard time finding ones with factory ends on them. These guys had just what i was looking for piece of cake to install just route wires mount and plug in very clean install

1999 Ford F-250 Super Duty

I purchased this harness to fix up a rat's nest of wiring the previous owner did on the vehicle when trying to install a brake controller. This product was exactly how it is described and fit perfectly. It plugged right into the stock harness on my 99 F250 SD and required no splicing of wires at all. Very clean just like OEM. It was well worth the money to have lights that I know will always be working for me!

2000 Ford F-250 and F-350 Super Duty

I needed to relocate the location of my 5 wheel plug-in. Because of a disability it is difficult to move around, the Endurance 5 wheel 7-pole plug was extremely simple to install. The factory plug- in made a simple connection. If anyone needs to install or replace 7- pole plug, etrailer has wonderful products. They make it possible to do it yourself and will be as good as if a professional had done it. There website if very helpful in choosing the right product for your needs and the videos are very helpful for the installation of there products.

2010 Ford F-250 Super Duty

I needed to rewire the " speghetti " wiring mess that trailer companies installed on my truck. What a mess but Doing business with etrailer was a wonderful experience. I ordered a a 5th wheel trailer wire kit to plug into OEM connector and a bumber 7 pin connector kit for my F250. All was Plug and Play. Took less than and hour and all lights, brakes, aux. everything worked perfect and first time. I now have a very clean, professional wiring. Looks better than factory installed.

Also all the LED lights I ordered for the boat trailer fit perfect and looks great. Very satisfied customer. Trailer Wheel and Frame is 10 miles away but I will be getting my trailer parts from etrailer from now on. Great Service and follow through on the order. I was notified and in the loop every step on the order and delivery process.

Thanks again

2000 Ford F-250 and F-350 Super Duty

Great product, easy installation. If you want to get an in bed trailer plug and keep the bumper hitch plug operational this is a good way to go. Great service from fast shipping. If the opportunity comes up I will recommend to friend or family.

2000 Ford F-250 and F-350 Super Duty

The pig tail plug in allows me to now plug my goose neck horse trail into the bed of the truck. Prior to this I was using the plug on the bumper hitch which was not the best set up. Now no matter how tight of a turn I make, no problem at all with the wiring.


Suzanne T was extremely helpful. When the phone got disconnected, she called me back to make sure the order was complete and I was satisfied. I put the parts on today. They all fit perfectly and function flawlessly. Thank You Suzanne!!

Still working great!
Henry K - 05/08/2015
works great N0 problems
Henry K - 05/10/2015


Works as it should. No problem with older campers.

1999 Ford F-350 Super Duty

I originally order'd the same product from another vendor. It did not have the correct plug for a 1999 Ford F-350, so I returned it. The product from E trailer fit the ford harness as advertised. It had plenty of wire length to place the plug anywhere desired.

2000 Ford F-350 Super Duty

The wiring harness fit my 2000 F-350 as advertised. This was the only website i could find that clearly listed this harness as being a direct fit to my truck.

Ford F-250 Super Duty

I placed a phone order for this and they were very friendly,helpful and professional.
The harness was delivered promptly. this is a very nice harness. I installed it into my f250 and it tested great(have not had a chance to hook up trailer). The harness is a good length and appears to be well constructed. I would definitely buy this product again for another truck and would highly recommend it.

Ford F-350 Super Duty

This looked like the product I needed to put a 7 pin connector in the bed of my F350 to plug in my camper, but I wasn't sure so I called customer service. The customer service rep was very knowledgable about my different options and assured me this would work great. It was easy to install and is far more professional than splicing in to wires. It took less than 1 hour to install.

Ford F-250 Super Duty

Had a hard time finding the wiring harness for my f250 with a square plug on the web site. called customer service and they gave me the right part number. order came fast in the mail.

2001 Ford F-350 Super Duty

I installed this kit on our 2001 F350. The price was great and kit was easy to install. Once the hole was drilled it may have taken 30 minutes. The only draw back was the wiring was a little to long.

Had trouble last time out. Going to check all the connections.
Al - 10/04/2018

1999 Ford F-250 and F-350 Super Duty

Product shipped promptly. All plug-n-play. Great addition for pulling the fifthwheel or gooseneck.


Harness is long...if you plan on installing it where recommends (between tailgate and rear wheel), you will have to coil it up or cut some out and re-splice.

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