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

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

Part Number: HM42137
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$76.26
Retail:$107.99
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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. 1-800-940-8924 to order Hopkins custom fit vehicle wiring part number HM42137 or order online at etrailer.com. Free expert support on all Hopkins products. Great prices 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.
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  • Reviews (136)
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Hopkins Custom Fit Vehicle Wiring - HM42137

  • 7 Round - Blade
  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • 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.


Features:

  • 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


Specs:

  • 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.



42137 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 - HM42137

Average Customer Rating:  4.9 out of 5 stars   (136 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.

by:
2009 Dodge RAM 2500

Exactly what I needed. The Hopkins Endurance 5th Wheel 90-Degree Harness is truly plug 'n play. Once you decide on the truck bed location for the new 7-pole plug and drill the hole the rest is simply snap together and you're done. The new harness fit perfectly with the factory 7-pin connector and had plenty of length to allow for the new plug to be mounted conveniently in the truck bed wall. No more cable hanging out over the tailgate.

Steve M. profile picture

Steve M.

8/23/2014

I have used the Hopkins Endurance 90-degree harness monthly over past year since installation. I have also used the factory bumper 7-pole plug as my towing needs required. Both connectors work every time indicating a solid fit and good contact between the factory 7-pin connector and the added Hopkins Endurance connector. Very pleased with both ease of installation and performance.



by:

Fits very nicely and is directly plug and play



by:
2006 Dodge Ram Pickup

Installed on my 2006 Dodge Ram 2500 in ten minutes. Works excellent! No more draping my wiring harness over my tailgate!



by:

Works well. Defiantly better than installing a gooseneck under the bed hitch. You can swap the plate over to a fifth wheel plate with ease. 2 birds one stone. Defiantly recommend

Peter profile picture

Peter

8/16/2023

Working great



by:
2006 Dodge Ram Pickup

Installation went great drill hole and plug everything in comes with enough wire to put virtually anywhere in the bed. I was very pleased with the quality of the connectors.



by:

Very easy install. Way too long of a harness for my needs.



by:

Wrong one for my vehicle even though it said it was for it.
Return policy costed more to return than it was worth for a refund so I kept it and gave it away to my neighbor.



by:

Easy plug and play installation. So far so good.



by:

Everything worked great.



by:

Perfect, easy install. Pu bed was wired for 5th wheel or gooseneck in l5 minutes.



by:

Easy Install and fast Delivery. Plugged right right in.



by:

Plugged right in thanks



by:
2007 Dodge Ram Pickup

This harness was a breeze to install. Simple unplug and plug back together, cannot be any easier. Harness was plenty long to locate the plugin anywhere you would choose. Factory style connectors worked perfect. Highly recommend this product and would absolutely buy again. Thanks etrailer for your quality products and wealth of application/installation info available!!!

Adam M. profile picture

Adam M.

1/26/2018

Very well just as expected.



by:

Came on time perfect fit easy to install .



by:
2008 Dodge Ram Pickup

Easy to install, high quality good directions !



by:

High quality and good instructions. The manufacturer provides plenty of cable to put the additional connector virtually anywhere.

Bruce B. profile picture

Bruce B.

8/16/2016

Both continue to work fine!



by:
2005 Dodge Ram Pickup

After using this plug adapter for a year I have been very satisfied. It was very easy to install, wiring plug was an exact fit. I use it for my fifth wheel travel trailer. I have not had any problems. Great product, thanks.



by:
2006 Dodge Ram Pickup

Finally got the right part, my bad the first time, and the Hopkins wiring harness was in my 2006 Dodge Ram truck in less than 30 minutes. Most of your time will be spent drilling the hole in the side of the bed. I used a 2" hole saw vice the 2 & 1/8th (already had the 2" and didn't want to run out and buy another hole saw) and had no problems getting the harness through the hole. Hooked up the trailer and everything worked perfectly. There's plenty of harness, maybe too much, for any application in the truck bed. Great product!



by:
Dodge

The wiring harness for my gooseneck 7 pole hitch on my Dodge is as advertised. The only problem is I looked under my truck it is not wired with a stock connector. I will have to cut and splice it anyway. Not a problem with the product but with my wiring.



by:
2001 Dodge Ram Pickup

I originally had ordered a different product but it was back ordered a month which I was ok with. After I placed the order, I received an email stating they had another conector that was basically identical that was in stock and if I wanted to switch to that one, I could call in and switch. So, I called in and they changed my order to that in-stock plug and it was here within a week! Awesome and easy customer service. It was also really easy to truck.

As for installation, it went flawless and I was done in under an hour. Hooked it up to one of my trailers and everything works perfect (including trailer brakes). Very happy with the whole purchasing/installing experience!



by:
2007 Dodge Ram-Pickup

Installed for a friend that had a camper. Plug and play other than the ground. Very straightforward and easy install. High quality product.

Paul S. profile picture

Paul S.

7/13/2018

Still working well. No complaints.



by:
2003 Dodge Ram Pickup

Trailer plug can't come unplugged or drag the ground anymore with connection inside of bed.

Brian profile picture

Brian

4/1/2018

Still works great



by:

Super easy install. Only needed about half the length of the wiring harness it comes with. Forget looking all over for a 2 1/8" hole saw. A 2" will do the trick. (The trailer video says 1 1/8", but that needs to be corrected). This harness is well worth the money.



by:

I Have had No Problems with this Product the Best plug and play for my application saved me time from having to splice wiring.

David profile picture

David

5/13/2017

The T-Wiring Harness that is sold bye etrailer.com is the best one on the market, I wish I had taken pics or Video of my install! I have had NO Problems with this product! I think the hardest part was deciding where to mount the 7 pin plug in the bed of my truck, very very clean application and looks like factory install I am very pleased with this product. This product is going to for many many years to come best product on the market!!!!



by:
2009 Dodge Ram Pickup

Wow what a fantastic experience! It first started when I called to verify I was buying the right 5th wheel wiring kit for my 2009 Dodge Ram 2500. Nicky K was the salesperson that helped me out, she took the time to verify my order and she placed the order for me at that point, I chose the two day delivery option and it arrived on time as she promised.
The endurance professional grade 5th wheel wiring kit part # 42137 was so easy that it took me only 45 minutes to install from start to finish, and most of that time was Running the wire from the bed location to the back of the truck where the factory 7 pin receiver is located. this kit is truly plug and play!! If I could do this in this amount of time and not have any problems then anyone can do it.
I would definitely recommend this company and this product to all my family and friends.


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  • Availability of Dodge Adapter Harness to Move 7-Way from Rear of Truck with Square Connector
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    Image 1 for
  • Installing In-Bed 7-Way on a 2005 Dodge Ram 2500 and Max Weight Rating for Towing 5th Wheel Trailer
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  • Availability of Fifth Wheel Trailer Wiring Harness For 2000 Dodge Ram 3500 Dually
    The correct fifth wheel trailer wiring harness you will need for your 2000 Dodge Ram 3500 is the Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug # HM42137. This wiring harness will fit the 2000 Dodge Ram with a factory tow package and factory 7-Way connector. I am including a link to a video of the wiring harness being installed on a 2004 Dodge Ram 3500.
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Info for this part was:

Employee Frances L
Edited by:
Frances L
Employee Tyler C
Written by:
Tyler C
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
Video Edited:
Chris R
Employee Laura H
Updated by:
Laura H
Employee Alexander C
Updated by:
Alexander C

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