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TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender - 7-Way RV

TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender - 7-Way RV

Our Price: $102.99
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Trailer Wiring
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Designed for use with your 21" long SuperHitch SuperTruss receiver extension, one end of this no-splice wiring harness plugs into your truck's 7-way blade trailer connector. The other end runs back 24" to clear your bed-mounted camper. Great Prices for the best trailer wiring from TorkLift. TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender - 7-Way RV part number TLW6021 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (20)
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TorkLift Trailer Wiring

  • Wiring Adapters
  • Single-Function Adapter
  • 7 Round - Blade
  • Plug and Lead
  • 0 - 5 Feet Long
  • 7 Round - Blade
  • TorkLift

Designed for use with your 21" long SuperHitch SuperTruss receiver extension, one end of this no-splice wiring harness plugs into your truck's 7-way blade trailer connector. The other end runs back 24" to clear your bed-mounted camper.


  • Extends your truck's 7-way RV-style trailer connector back to clear your bed-mounted camper
    • One end of wiring harness plugs into your existing 7-way
    • Other end of harness has 7-way port for connecting to your trailer wiring
  • Designed specifically to work with the 21" long TorkLift SuperTruss hitch extender (TLE1521 - sold separately)
    • Mounting bracket for 7-way plug is included with the SuperTruss extension
  • Installs quickly and easily - no splicing required
  • Measures 24" long
  • Made in the USA

W6021 Tork Lift 2-Way Wiring for 21" Super Truss Extension - 7-Pole Blade-Style Trailer Connector - 24" Long

Item # TLW6021

Video of TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender - 7-Way RV

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

Video Transcript for TorkLift Wiring Harness Extensions For SuperTruss Hitch Extenders Review

Today we're going to be taking a look at the Torque lift line of wiring harness extensions for use with the super truck hitch extenders. These are available in several different lengths. Just depending on how long that hitch extender that you're using is going to be. This is Torque's Lifts 36" extension that matches their 36" super stress. If you're going with the longer super truss, get the longer. If you're going with the shorter, get the shorter. Really a nice option to where you can plug it right into the back of your vehicle, bring your power down to where it's right here, readily available and accessible for you to get to. What we're going to do is take our, what looks like a trailer plug end, we're going to pass it through our bracket.

It's just flexible enough we can kind of bend that bracket so allow it to come through. Then here's what we want, that's our 7 pole connector. We're going to be bale to hook our trailer up right here. We've got the nice safety chain connections there an then also our wiring connection. Slide that in.

We're pass our screw through the face there and then just put our nuts on the back. Now, the hardware's not provided so you'll need some hardware to pass through there. You can see our bracket's kind of got the oblong holes to make it to where it'll fit a lot of different style harnesses. I'm going to put a flat washer on to give our nut a good surface to bite to when we tighten it down. Now we can go ahead and tighten those down as well. At that point, we're mounted on, got a nice secure connection point.

We can basically just plug this right into the back of our truck. You don't want this to be hanging down underneath our hitch where it might drag or something like that. That will complete today's look at the Torque Lift wiring harness extensions for the super truck hitch extender.

Customer Satisfaction Score:

Customer Reviews

TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender - 7-Way RV - TLW6021

Average Customer Rating:  4.7 out of 5 stars   (20 Customer Reviews)

Designed for use with your 21" long SuperHitch SuperTruss receiver extension, one end of this no-splice wiring harness plugs into your truck's 7-way blade trailer connector. The other end runs back 24" to clear your bed-mounted camper.


Way over priced for a non-weather proof extension. This extension would be exposed to water intrusion when installed. The wires into receptacle/plug ends are open for water seepage. This product appears assembled from off-the-shelf items, not molded for weatherproof integrity. This inferior design is not evident in the site photos of the product. And the price - twice as much as alternatives I have discovered since purchase. See the attached photos for the missing detail. I would likely return if I could and just assemble my own at a lower price. This item is not what I expect from eTrailer.


My travel trailer cord was not adequately reaching my Expedition plug. Had already been pulled out when making a left turn. This extension worked great! Nice and secure fitting. Wrapped the excess once around the tongue jack for a better fit.

Its been a year and the extension cord still works great! Stays secure and gives enough room for turning.
Enrique B - 05/31/2017


This harness extension has served well in extending my connection to a more handy spot one my motorcycle rack on the back of my motorhome. Zero complaints. Quick delivery and reasonable price from etrailer too!


My wiring harness works great. Best of all Etrailer ad my sales person was wonderful and understood exactly what I needed. I spent 3 hours on the phone and internet trying to find what I needed and none of them had a clue. This company truly has the most knowledgeable staff by far. I will not use anyone else from this point forward.


Bought with 21" hitch extension for torklift super hitch. Appears to be good quality and will test out soon


Excellent customer service and product


Towed the camped from NY to California and back and this worked perfectly with a hitch extension


I used this product as an extension to my existing harness because our new truck's plug in is located in a different place than the previous one and the chord would disconnect when turning. Not the intended purpose for this product but it works just fine.


Perfect fit with my 21” hitch extension. Easy to install and hook up to the trailer.


it was just what I needed,now my connection will not pull a part


Works as it should.


Worked great!




very good item


just the right size


Excellent product. As advertised






See what our Experts say about this TorkLift Trailer Wiring

  • Recommended 7-Way Extension to Prevent Connection with Trailer from Unplugging During Turns
    It sounds like you just need a bit of extension for the 7-Way on your truck. I recommend taking a look at the TorkLift Wiring Harness Extension # TLW6021. This will plug right into the 7-Way on your truck and provide you with a 21 inch extension and an RV/trailer style 7-Way at the other end. This may be a bit longer than what you are needing, but it is the shortest such extension we currently have available. I have attached a video demonstration on this harness that you can also check out.
    view full answer...
  • Short 7-Way Trailer Connector Extension
    The shortest we have is 21 inches. A little long but not too bad that it could cause a huge amount of hanging wire. The part is # TLW6021.
    view full answer...
  • 7-Way Extension Near 2 Feet in Length
    The closest adapter we have to what you need is the Torklift part # TLW6021. This is a 7-way adapter that has a male end on one side and a female on the other. It measures right at 24 inches though.
    view full answer...
  • Shorter Length 7-Way Connector to 7-Way Plug Recommendation
    We have the part # TLW6021 instead which has the same 7-way socket on one end and plug on the other. The total length is 21 inches. I attached a review video for this for you to check out as well.
    view full answer...
  • Inexpensive 7-Way Extension Harness Recommendation
    The part # 20027 is a 7-way extension that is 7 feet long and costs a bit less than the part # TLW6021 that you referenced.
    view full answer...
  • Recommended 7-way Connector Extension For 2018 Toyota 4Runner
    I have another option for you, but the Trailer Connector Adapter w/ Lamp-Out Sensor Bypass - 7-Way RV to 7-Way RV - Vehicle End # 20142 has built in resistors for vehicles with a lamp-out error and and since the lights are working properly when plugged in to your 2018 Toyota 4Runner, you do not want the increased resistance in the wiring. Instead I recommend the TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender - 7-Way RV # TLW6021 which is the shortest standard extension...
    view full answer...
  • Options for 7-Way Wiring For Truck Bed Camper Shell to Allow Longer Wiring Solution
    10 feet is the longest 5th wheel style of 7-way harness that we offer. If you can find a more direct route to get it up to the front of your truck bed that would be ideal. Otherwise we do have 7-way extensions you could use on the camper like # TLW6021 which is 21 inches or the part # TLW6048 which is 48 inches long.
    view full answer...
  • 7-Way Wiring Harness Extension For Connecting To a Slide In Truck Camper On a 2022 Ram 3500
    Yes, we will have 7-Way Extensions like the TorkLift Wiring Harness Extension # TLW6021 that is 2' long to the Curt Extension # C56080 that is 7' long. In the event you will also be towing a trailer behind your truck with the truck camper a TorkLift Wiring Extension # TLW6524 includes a 7-way for the trailer and slide in camper.
    view full answer...
  • Availability of 7-Way Trailer Wiring Extension
    We have 7-way extensions like the 24 inch part # TLW6021 or the 28 inch long part # TLW6024 which would work great depending on how long you are needing.
    view full answer...
  • What Trailer Wiring Connectors are Often Found on Rental Trailers
    A 7-way trailer wiring harness is a very commonly used trailer connector that most trailers are designed to work with. The only other common wiring connector that you might encounter would be a 4-way. Which all you would need then to convert your 7-way to a 4-way would be the # PK12716. With the # PK12716 you would have the ability to tow a trailer with either a 7-way or a 4-way which would cover basically any trailer you would be able to rent.
    view full answer...
  • Can Power Cable on Nighthawk Tow Bar be Run on Opposite Side of Tow Bar
    I was talking to our shop manager about this and you can't really move the wiring harness on the Nighthawk tow bar # RM-676 from one side to the other. It is unlikely to be a problem in terms of length because the coiled cable does stretch. Another option is to use a small extension such as # TLW6021 which is 24 inches long. Part of the issue is that the LED lights run off of the running light wire in that harness and there isn't a way to access it. At least not easily.
    view full answer...
  • 2017—2019 Superduty F250 With Factory 7 Pin Extension Option
    As long as nothing is plugged into the other end of the extension you will not receive the error messages you describe. A solution for you available in a variety of lengths but this is the shortest, is the TorkLift Wiring Harness Extension for 21" SuperTruss Hitch Extender # TLW6021. Included are some video resources for additional information.
    view full answer...
  • Troubleshooting TorkLift Wiring Harness Extension Not Working After Heavy Rain
    Since everything on the truck and trailer worked perfectly when removing the TorkLift Wiring Harness Extension # TLW6021, the issue certainly appears to be within the extension itself. I recommend checking the connector and plug for any dirt or debris that you can see between and inside the pins, simply cleaning out as needed. Debris build up within the connector can lead to shorts can cause the type of issue you experienced on your last trip. There might also be some internal corrosion...
    view full answer...
  • Hitch Extension Recommendation for 2018 Ram 3500 with Camper Towing Boat Trailer
    For your 2018 Ram 3500 with a factory 2-1/2 inch hitch the Curt Hitch Extension and Reducer for 2-1/2" Trailer Hitches - 24" to 34" Long # C45048 would be what i recommend. It can give you either a 24 inch or 34 inch long extension and will fit your hitch as it was designed for 2-1/2 inch hitches. I attached a picture that shows a similar setup using this extension for you to check out as well. You'll also need to extend the 7-way too with a kit like the part # TLW6021.
    view full answer...
    Image 1 for
  • Can Curt Echo Brake Controller Install on Truck with Limited 7-Way Clearance
    To install the Curt Echo Mobile # C51180 you'd have to move your current 7-way if possible by repositioning it or you'd have to use a short 7-way extension like the # TLW6021.
    view full answer...
  • How to Pick Out 7-Way Extension When Using Curt Hitch Extender C45048
    When using the Curt hitch extension part # C45048 that you referenced at the 34 inch length to pick the correct Torklift 7-way extension really depends on the length of the 7-way harness on your trailer. If it's one that would be pulled tight if it was extended at all past the coupler then I'd recommend going with the longer version part # TLW6036. If your trailer has a connector that has more than enough length you'd want the shorter version part # TLW6028. Basically you want to make...
    view full answer...
  • Is There an Extension For a 7-Way Trailer Wiring Harness
    We absolutely have an extension for a 7-way trailer wiring harness with a male and female end. You can choose from a number of different lengths in order to get the size you need. I'll go ahead and list out the extensions by overall length so you can get the correct one for your needs. - 24" Long: TorkLift Wiring Harness Extension # TLW6021 - 28" Long: TorkLift Wiring Harness Extension # TLW6024 - 32" Long: TorkLift Wiring Harness Extension # TLW6028 - 38" Long: TorkLift Wiring Harness...
    view full answer...
  • Available 4-Pole and 7-Way Trailer Wiring Extensions
    We do offer many types of trailer wiring extensions. For 4-pole flat trailer wiring you can use 4-foot extension # HM47115 or 1-foot part # 9653P. For 7-way trailer wiring we have 28-inch extension # TLW6028, 21-inch # TLW6021 or one of the others shown on the linked page.
    view full answer...
  • Recommendation to make Trailer 7-Way Longer
    The closest adapter we have to what you need is the Torklift part # TLW6021. This is a 7-way adapter that has a male end on one side and a female on the other. It measures a little longer than you requested at 24 inches though. Your ideal solution would be to remove your current 7-way and install a longer one on your trailer like with the part # H20042 that is a 3 foot long 7-way plug and lead. You could trim this down to match your trailer length needs as well.
    view full answer...
  • Recommended 7- and 4-way Bumper Plug Extension for Use with Cabover Camper
    I have just the thing for you to extend your bumper plug to the end of your camper. If you want to get the 7-way and 4-way you will want the # H20042 and the # HM48470. This combination will need to be wired up but will include the mounting bracket for the 7-way and 4-way. If you prefer to have a prewired 7-way the one you will want it the # TLW6021. All of our prewired ones will only include the 7-way. A mounting bracket for this extension plug is # TM76474. I have linked all the...
    view full answer...
  • Does Torklift 7-Way Extension Require Mounting Bracket on Hitch Extender
    For a 7-way extension to go with the Curt Extender part # C45796 the part # TLW6021 would be the best option. The bracket part # C58000 would be your best option as it will hold the 7-way socket which can be hard to keep off the ground but if you wanted to wrap the harness around the extender to keep it off the ground that is an option as well.
    view full answer...
  • Trailer Wiring Extensions for use with Reese Titan 2-1/2-Inch Hitch Box Extension RP45018
    Thank you for your recent purchase of the Titan 2-1/2-Inch Hitch Box Extension # RP45018 and the Blue Ox 2-1/2-Inch Hitch Receiver Immobilizer # BX88225. These two items are compatible with each other. For a trailer wiring extension if you need a 7-way type you can use TorkLift 21-inch # TLW6021, 36-inch # TLW6036, 42-inch # TLW6042, 48-inch # TLW6048, 60-inch # TLW6060 or for a 10-foot length part # TLW6510. If you need a 4-pole wiring extension we have 12-inch # HM48145, 48-inch #...
    view full answer...
  • How Do I Install A Mounting Bracket To A 7-Way Harness That Does Not Have A Removable Connector?
    There are screws on the back of the TorkLift Wiring Harness Extension # TLW6021 as you can see in the photo that I included. You will need to loosen the screw that pinches down on the wire to hold it in place. Then you will be able to remove the screws located near the mount plate to gain access to the wiring. It is a good idea to take several pictures and to write down what color wire goes to which terminal before removing the wires. Once you have removed the wires you can attach the...
    view full answer...
    Image 1 for
  • Recommended SuperTruss And TorkLift SuperHitch on 2016 Chevy 2500
    There is really only one solution I recommend that will work for your desire to pull a trailer with the tailgate down. I recommend removing your Class V hitch and replacing it with the TorkLift SuperHitch # TLC1211. This would need to be used with a factory hitch and the TorkLift SuperTruss Hitch Extension for SuperHitch Trailer Hitch Receivers - 36" Long # TLE1536 to clear your tailgate. There are wiring extensions available as well like the 36 inch # TLW6036. There are different SuperTruss...
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Andrew L
Video Edited:
Andrew L
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B

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