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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 # HM42137

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HM42137 - Custom Fit Hopkins Fifth Wheel and Gooseneck Wiring
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  • Custom Fit
  • Fifth Wheel and Gooseneck Wiring
  • Hopkins
  • 7 Blade
  • 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. Call 800-298-8924 to order Hopkins custom fit vehicle wiring part number HM42137 or order online at etrailer.com. 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 (65)
  • Q & A (43)
  • Videos (4)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM42137

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

2002 - 2002 Dodge Ram Pickup 1500 with factory 7-Way

2002 - 2009 Dodge Ram Pickup 2500 and 3500 Pickup with factory 7-Way

2000 - 2008 Dodge Ram Pickup Pickup with factory 7-Way



California residents: click here


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


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




Video Transcript for Trailer Wiring Harness Installation - 2003 Dodge Ram Pickup

Today on our 2003 Dodge Ram pickup, we'll be installing the Hopkins Endurance 5th Wheel/Gooseneck 90-degree wiring harness with 7-pole trailer connector, part number HM42137. To begin our install, we're going to start in the pickup bed. We're going to find a suitable mounting location for our 7-pole plug. Once we find our location, which we're going to go here in the pickup bed side wall behind the wheel well and in front of the rear stake pocket, then we can take our hole saw and drill out our 2 1/8" hole as per the instructions. Once we have the hole drilled out, we can move underneath the vehicle and feed our 7-pole connector up through the hole. Another option while you're already in the pickup bed, is to take the vehicle connection end or T-connector and feed it down.

Note, be careful when feeding it down around the sharp edges where we just cut out the hole. Now we have our 7-pole connector end remaining here in the pickup bed and before I install the 7-pole plug, we'll use some of the dielectric or terminal grease provided with the install kit to put on the end of the connector to help prevent corrosion that can build up from moisture over time. With our dielectric grease in place, we can go ahead and install our 7-pole connector onto the harness, pressing firmly together, making sure it locks in position. We'll then go ahead and mount the 7-pole plug here to our pickup bed. To mount it, we'll use the self-tapping screws provided with the install kit. With our 7-pole connector mounted here in the pickup bed, we can move underneath and continue routing our wiring and making our connections under the pickup bed.

Now we've moved underneath the pickup bed. We're going to go ahead and take the wiring harness, feed it up over the frame towards the center of the vehicle. The T-connector in our new Endurance harness will plug in-line with the manufacturer's wiring that plugs into the back of the bumper. To disconnect it from the back of the bumper, we'll first need to unlock the red locking tab by sliding it over, and these will get a little stiff over time. I'm just going to use a flat-bladed screwdriver to assist me in pushing it over. Then I'll press on the connector lock and remove it from the back of the bumper-mounted 7-pole connector.

Before we make the connection with our T-connector, we're going to go ahead and install some more dielectric grease on both ends, one on the vehicle side and one on our wiring harness side. Once we've finished installing the dielectric grease, we'll take the manufacturer's harness and plug in to our new T-connector. Push the 2 connectors until they lock in place and then slide the red locking tab back into position. We'll then take the other end of our T-connector and plug into the back of the 7-pole connector that's mounted into the bumper where we removed the manufacturer's harness from. Once it's locked into place, we'll slide the red locking tab over to lock it in position. We'll then take the remaining portion of our wiring harness and secure it behind the bumper.

To secure it, we're just going to use some zip ties to hold our wiring up and out of the way. With the wiring harness secured, you'll notice we left one wire out. This is a white wire with a pre-attached ring terminal that's going to get routed to the frame and provide ground for the 7-pole connector. To secure it the frame, we're going to use a self-tapping screw. With our wiring harness installed and secured, we'll cut off the excess from the zip ties to clean up our install look. With that, we've completed the install of our Hopkins Endurance 5th Wheel/Gooseneck 90-degree wiring harness with 7-pole trailer connector, part number HM42137, for our 2003 Dodge Ram. .


Customer Reviews

Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness with 7-Pole Plug - HM42137

Average Customer Rating:  5.0 out of 5 stars   (65 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.

- HM42137
by:
2002 Dodge Ram Pickup

Hooked up works great, easy installatio n! 146386



- HM42137
by:

Excellent price, quality construction, super easy installation. Took less than 20 mins to install start to finish. 649141



- HM42137
by:

Great product. Easily installed. No wire splicing needed. 609898



- HM42137
by:

The product showed up sooner than expected and was a perfect fit and was installed in about 10 minutes and works perfect. 603646



- HM42137
by:
2001 Dodge Ram Pickup

Took about 15 mins to install because I predrilled the hole in the bedside. Few moments later I was pulling a trailer and it works great! 525995



- HM42137
by:
2004 Dodge Ram Pickup

Very pleased with the service and product. Very easy to install, the video is a nice touch. Will be ordering again in the near future. 514194


Comments

Work’s great, should of done this years ago. Great product.

Pierre - 06/02/2019

56038

- HM42137
by:

Good product good fit. 453823



- HM42137
by:

Great product easy install would buy ag ain 431322



- HM42137
by:
2001 Dodge Ram Pickup

Very easy to install only took a few minutes, just plug and play very simple great product !!! 410593



- HM42137
by:

Product was easy to install. Snapped right into factory wiring cut bed liner and ran four self tapping screws in. 409005



- HM42137
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. 405333


Comments

Still working well. No complaints.

PAUL S - 07/13/2018

40876

- HM42137
by:
2001 Dodge Ram Pickup

easy to install, quality product 390986


Comments

Thanks for the great review on our HM42137 Wiring Harness, Trent!! We at Hopkins are happy that you are pleased with this product. If you have any concerns or questions, please get in contact with etrailer customer service. Thank you!

Hopkins C from - 06/13/2017

24960

- HM42137
by:
2007 Dodge Ram Pickup

Great product, easy to install, everything went together great. 379574



- HM42137
by:
2006 Dodge Ram Pickup

I would recommend these products to anyone, every thing I got worked perfectly thanks for a quality product 376160



- HM42137
by:
2004 Dodge Ram Pickup

Product arrived on time and complete. This is a complete kit with every thing you need. It was easy to install and very high quality. Had install video on website. Love the plug and play no wire to cut or splice. 371942



- HM42137
by:
2006 Dodge Ram Pickup

Great service and delivery. Harness install was easy, works perfect! Thanks! 371884



- HM42137
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. 370434



- HM42137
by:
2003 Dodge Ram Pickup

Trailer plug can't come unplugged or drag the ground anymore with connection inside of bed. 361515


Comments

Still works great

Brian - 04/01/2018

36661

- HM42137
by:

good quality parts very happy 343738



- HM42137
by:
2001 Dodge Ram Pickup

Good quality 340554


Comments

No issues

Scott - 02/13/2018

34671

- HM42137
by:
2006 Dodge Ram Pickup

Works well 333393



- HM42137
by:

Works great it easy to take in and out you won't be disappointed! 317377



- HM42137
by:
2006 Dodge Ram Pickup

The hitch was better than I thought it would be. Installation was easy with the enclosed instruction sheets. The Quality of the hitch assy. is great. I highly recommend this hitch. The wiring harness worked great and was easy to install. 300574



- HM42137
by:

Good quality and installs easily. 294625



- HM42137
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!!! 278019


Comments

Very well just as expected.

Adam M - 01/26/2018

33799

- HM42137
by:
2006 Dodge Ram Pickup

Easy install great product 267480



- HM42137
by:
2007 Dodge Ram Pickup

Good product, easy to install.drill one big hole & 4 little ones,plug the wires in &you are done. 250142



- HM42137
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. 250101


Comments

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!!!!

David - 05/13/2017

23854

- HM42137
by:
2006 Dodge Ram Pickup

Absolutely great! Wonderful customer service, fast and friendly. Product exactly as advertised. Will shop with this business again! 246914



- HM42137
by:
2006 Dodge Ram Pickup

Product arrived on time or maybe a little early. Easy to install. I'm completely happy with this product. 241554



- HM42137
by:

Everything came as ordered and I was well pleased Very good service. Thank you 239222



- HM42137
by:
2000 Dodge Ram Pickup

Great product and easy install! 238655



- HM42137
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. 233031



- HM42137
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. 217333



- HM42137
by:

High quality and good instructions. The manufacturer provides plenty of cable to put the additional connector virtually anywhere. 216112


Comments

Both continue to work fine!

Bruce B - 08/16/2016

20261

- HM42137
by:

Great product, simple rugged design. Would recommend to a friend! 215156



- HM42137
by:
2007 Dodge Ram Pickup

Product every bit as good as advertised. Very neat and well-made harness. Installed in ten minutes as hole in bed was existing. Great product, fast shipping, excellent updates. 190481



- HM42137
by:
2007 Dodge Ram Pickup

This item came promptly and was exactly as it was described. It installed quickly and easily. 170569



- HM42137
by:
2002 Dodge Ram Pickup

Ease of installation, no surprises, very happy with product and service. 165443



- HM42137
by:

easy installation and well made product 163532



- HM42137
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. 154297



- HM42137
by:

Just what the doctor ordered. Thanks. 151495



- HM42137
by:
2007 Dodge Ram Pickup

Product was shipped quickly upon ordering, and received in good condition. Extremely easy installation, 10 minutes max, all while baby napped. Nothing more simple than plug and play. I enjoyed not having to splice and butcher my existing vehicle harness. Customer service with this order, and other orders has always been of the upmost. Keep up the good work. 138897



- HM42137
by:

Product was exactly as advertised and installed easily. 135484



- HM42137
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. 132815



- HM42137
by:

Ordered part and it was picked, packaged and shipped same day and arrived when said. I would order from you again. I ordered the 5th wheel harness for bed of truck. Just unplug one wire harness and plug in the other, easy and fast. 127262



- HM42137
by:

Excellent Product. Quick and easy insta ll. 122160



- HM42137
by:

ARRIVED EARLY AND WAS VERY EASY TO HOOK UP TO EXISTING TRUCK WIRING. 121836



- HM42137
by:

Excellent Product, Excellent Service, Very Happy. Oh, and it was very easy to install, would highly recommend 120611



- HM42137
by:

excellent product 117183


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    view full answer...

  • Looking to Add Plug and Play 7-Way Wiring Harness to Bed of 2007 Dodge Ram 3500
  • As long as your 2007 Dodge Ram Pickup is equipped with a factory 7-way, you can use the Hopkins Endurance 5th Wheel/Gooseneck 90-Degree Wiring Harness, # HM42137. This harness will plug into the existing wiring to give you a 7-way in the bed and also retain the use of the 7-way at the back of your truck. I have included a video for you. The 7-Way Pre-Wired Car Connector, # 20023, is not a plug and play option. Wiring would be required.
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  • Which Reese 5th Wheel Trailer Hitch and Install Kit Fits a 2006 Dodge Ram 2500 Mega Cab
  • I spoke with my contact at Reese, and in addition to the # RP30051, you will need Universal Fifth Wheel Trailer Hitch Installation Kit with Rails, # RP30035. If your 2006 Dodge Ram 2500 has overload springs, you will need an additional bracket kit, # RP58186. The 5th wheel hitch you referenced is a slider and is for a short bed. If you have a long bed, you can use a regular, fixed type 5th wheel, # RP30047, and the same installation kit. If your truck bed is less than 6 feet long,...
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  • 5th Wheel Trailer Hitch Installation Kit for Curt R5 and 2007 Dodge Ram 3500 Long Bed
  • For your 2007 Dodge Ram 2500 long bed you can use Curt installation kit # C16420-204 that you referenced. The rails that come with this kit will accept Curt, Draw-Tite, Hidden Hitch, Reese, Valley, and Husky 5th wheel hitches, fixed and slider, that fit in above the bed rails. I have linked the instructions and a video showing a typical installation for you. To add in-bed trailer wiring you can use # HM42137. This will make connecting the 5th wheel trailer electrical connection easier.
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  • Availability of Dodge Adapter Harness to Move 7-Way from Rear of Truck with Square Connector
  • I believe we have exactly what you are looking for. The Hopkins 7-Way Harness part # HM42137 is a kit that plugs into the square connectors of your truck and allows you to install a second 7-way elsewhere in the truck bed. Typically this is installed up near the wheel well for gooseneck or fifth wheel applications. The harness is a bit longer than you need at 10 feet but would still work well.
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  • Will Curt Custom 5th Wheel Installation Kit Work With RBW Lil Rocker 15K on a 2008 Dodge Ram Pickup
  • Since the RBW Lil Rocker 15K is compatible with industry standard base rails, the Curt Custom 5th Wheel Installation Kit # C16420-204 will work well in your 2008 Dodge Ram Pickup 2500. The Curt Installation Kit that is referenced uses Universal Base Rails # C16204 which will work with any 5th wheel hitch that installs in industry standard rails. If you do not already have a 7-Way wiring harness installed in the bed of your Ram, then I recommend using the Hopkins 5th Wheel/Gooseneck 90-Degree...
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Info for this part was:

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

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