Hopkins 7-Way Molded Trailer Wire Connector - 11' Long
(92 reviews)
Price: $53.62
In Stock
Hopkins 7-Way Molded Trailer Wire Connector - 11' Long
Item # HM20048
Our Price: $53.62
Orders above $99 qualify for Free Shipping
In Stock
- All Info
- Reviews (92)
- Q & A (0)
- Photos
- Why etrailer?
Hopkins Trailer Wiring - HM20048
- Trailer Connectors
- Trailer End Connector
- 7 Round - Blade
- Plug and Lead
- 11 - 20 Feet Long
- Hopkins
This molded, 7-way, RV-style, trailer-end connector lets you replace a damaged wiring harness on your trailer.
Features:
- 7-Way trailer-end connector lets you replace a damaged wiring harness on your trailer
- Pre-wired to ease installation
- Molded to protect wires from corrosion and abrasion
Specs:
- Cable length: 11'
- Wire gauges:
- 14 Gauge - brown, red, green, and yellow
- 12 Gauge - blue
- 10 Gauge - black, and white
| Wiring Code | ||
|---|---|---|
| Molded Connector (HM20048) | Function | Usual Trailer Wire |
| White Wire | Ground | White Wire |
| Black Wire | 12 Volt (Hot Lead) | Black Wire |
| Green Wire | Tail Lights | Brown Wire |
| Brown Wire | Right Turn | Green Wire |
| Blue Wire | Brake Power | Blue Wire |
| Yellow Wire | Reverse | Purple Wire |
| Red Wire | Left Turn | Yellow Wire |
20048 Hopkins 7-Way Molded Trailer Wire Connector - 11 Feet Long
Same as 20248
California residents: click here
Customer Reviews
Hopkins 7-Way Molded Trailer Wire Connector - 11' Long - HM20048
Average Customer Rating: 4.8 out of 5 stars (92 Customer Reviews)
This molded, 7-way, RV-style, trailer-end connector lets you replace a damaged wiring harness on your trailer.by: Wayne08/26/2017
As always the products from etrailer.com arive quickly and are excellent products. I always go to etrailer first knowing I will get the best product and at the best price. The Hopkins 7-way trailer wire connector is top notch. The rubber is pliable and the fitting itself is of top quality. Thanks again for the great and timely service. ,Wayne
Comments
My 7 wire connector works as well today as the first day. Excellent quality as always from etrailer.com
Wayne H - 08/27/2018by: Neil11/23/2020
Very high quality. It's been outside fur a year, and looks brand new.
Comments
Holding up very well. Its been out in the weather all year, and looks new. Nice long lead.
Neil W - 11/24/2021by: Tom 08/15/2021
Used this on my Arctic Fox TT to replace the original pigtail which never properly fit the Hopkins connector on my Toyota Tundra. This one is the real deal, much better mechanical and therefore better electrical connection. Not overly tight, yet snug and secure. Should have installed this years ago! Highly recommended.
by: David06/25/2018
I used this product to update/repair the rather shabby OEM wiring harness. It worked perfectly. I love etrailer!
Comments
Still working perfectly
David M - 06/25/2019by: Jim m.08/05/2016
Well built and works very well highly r ecommended
Comments
i did a complete rewire and added brakes to frt axle and after towing quite a few thousand miles to catch fish i would do it again
Jim m - 08/05/2017by: Bill09/03/2018
I purchased a female ( TRAILER SIDE) wiring harness and a wiring connector box for connecting the trailer body wiring and trailer plug. This combination works perfectly with my 8 TON goose neck trailer an one ton dual wheel truck. I use Hopkins wiring connectors and accessories on all my farm equipment. and have been very satisfied with them.
by: Dave H.06/17/2019
Ordered this a year ago for a home made trailer I built. It has worked flawlessly with no problems. I will not hesitate to buy this product again. Thanks etrailer
by: Richard 01/25/2022
It looked to short when it came out of the box! However, it was exactly what I ordered and right for the job. Ordering was fast and delivery was quick
by: Ted 06/10/2021
I'm sold on etrailer.com service, from ordering right on through after sale follow-up by the sales staff. Great job, great experience!
by: Sam B07/28/2017
The wire works as expected, bu BEWARE, the wire colors are not standard. etrailer should attach a notice with the shipment. The brown wire goes to green, the green wire to brown, the red to yellow, and the yellow to the backup light (purple).
I wish I'd realized that BEFORE I installed it and trimmed the wires inside my wiring block!!
Fortunately, because I don't have a backup light on the trailer, I could move all wires left by one post, so that the wire lengths still worked. Otherwise, it would have caused real problems.
Comments
Sam B~~Thanks for your comments. There are two standards in the industry for 7 Blade cables. The standard that this product is wired to is the RV standard. The second standard for the 7 Blade cables is newer than the first but is becoming more popular. We do manufacture 7 Blade cables to both of these wire color standards.
Hopkins C from
- 08/22/2017by: Rob07/03/2018
I tried to find this wiring connector locally with the extra long lead and the trailer "professionals" told me it doesn't exist. I got online etrailer.com and found it in a matter of seconds. It arrived days ahead of schedule and is exactly what I wanted, plus it was a great price and high quality! I recommend this company for any and all things towing and trailer related!
by: Bruce09/08/2018
the wire colors do not match brown was for left turn signal the only two wires that are right are the white and blue so if you purchase this product make sure you
check it first before you wire it in or you will cut it off and rewire it
Comments
There is more than one accepted wire color code convention for a 7-way trailer connector, which is why we list the wire color code in the product description above.
-- 
Mike L - 09/10/2018by: Brian 01/29/2022
This item was exactly as described , well made.
by: Al B08/09/2017
Quality product. Nice heavy gauge wire for the power, ground, and electric brake circuits. The only complaint I have is the unique (non standard) color coding of the individual wires. This would be so much simpler if they used industry standard color coding on the conductors in the cable.
Comments
AL B~~Thanks for your comments. There are two standards in the industry for 7 Blade cables. The standard that this product is wired to is the RV standard. The second standard for the 7 Blade cables is newer than the first but is becoming more popular. We do manufacture 7 Blade cables to both of these wire color standards.
Hopkins C from - 08/22/2017by: Ben02/07/2019
This cable was of good quality, however, the wiring was different than the typical 7-pin RV connectors. I had to move wires around to make it work on my application.
by: James Mc07/11/2017
Not my first order from etrailer and definitely not my last. My only complaint would be in the packing of small or fragile items loosely in a box with heavier items. One of the trailer light mounts was broken when it got here. No other issues though.
Comments
We do our best to package our orders so that they will arrive to you in good condition. I will send this to our shipping department manager for review.
-- Laura E - 07/15/2017
by: Steve07/16/2017
This wiring harness is the great. It was very easy to work with and install. The harness it replaced was so rigid that even in the middle of summer is was not flexible but this harness was very flexible.I will see how flexible it is when the zero degree weather comes in a few months but I think it will be ok.
by: John S12/08/2021
Great price, very fast delivery.
by: Kathleen02/22/2018
This was exactly the product we wanted and it arrived exactly when you said it would. Thank you very much. We will be using this on a fifth wheel homemade trailer.
Comments
It worked great. Thanks.
Kathleen - 02/23/2019by: Gary 11/05/2021
Excellent product
by: Joe 09/29/2021
Perfect product for what I needed!
by: Teardrop Camping06/08/2021
Sealed end is well done. Outside covering is more than adequate.
by: Vince S.04/27/2017
Both the 11' trailer connector and the Junction box were exactly the items that my project needed. They were used to rewire a gooseneck horse trailer.
by: Mark 09/04/2021
The service is beyond excellent. I appreciated the call conserning the brakes. Most places would have made me wait until the part was back in stock. You advised me whst you had to replace it. Great customer service
25
92
Show More Reviews
Ask the Experts about this Hopkins Trailer Wiring
- What Does Black Wire In Hopkins 7-Way Molded Connector HM20048 Do?The black wire on the Hopkins 7-Way Molded Trailer Wire Connector - 11' Long # HM20048 you were looking at is for the 12v power circuit that typically gets used to trickle charge an on-board battery, or for powering an electric trailer jack. If you do not have any accessories on your trailer that use the 12v power from the tow vehicle you can just leave the wire taped up or in the junction box un-used. I included a video of the # HM20048 for you to take a look at.
view full answer... - Does The Black Wire On My Hopkins 7-Way Power My Running LightsThe Hopkins 7-Way Molded Trailer Wire Connector - 11' Long, part # HM20048 is for a 12v circuit. This is the accessory circuit. Oftentimes it is used to charge a trailer's battery. The green wire on this connector is what powers the running lights. I have included a weblink to our section on wiring and a frequently asked questions link to 7-way connector wiring below.
view full answer... - Does Black Wire on 7-Way Go To 12V PowerTypically the black wire on a trailer 7-Way like the Hopkins # HM20048 is for 12V power. It will run from the positive battery terminal on your tow vehicle back to your trailer battery or whatever you're needing to power (like interior lights). With that being said there are a few things I want to clarify before you start making connections; you'll need to charge your tow vehicle battery with an alternator - not the trailer battery (that seemed like what you're doing with how you worded...
view full answer... - What is the Diameter of the Cable on Hopkins 7-Way Molded Trailer Wire Connector # HM20048On the Hopkins 7-Way Molded Trailer Wire Connector # HM20048 the outer diameter of the cable is 5/8 inches. On the inside the red, green, yellow and brown wires are 14 gauge, the blue wire is 12 gauge and the white and black wires are 10 gauge.
view full answer... - What is Function of Black Wire on Trailer 7-Way part # HM20048The black wire of the Hopkins 7-Way Molded Trailer Wire Connector # HM20048 carries the 12 volt accessory circuit. This is the circuit that will typically power interior lights or charge a trailer's battery. I attached a help article that covers trailer wiring for you to check out as well.
view full answer... - What Would Cause Constant Power To Electric BrakesI would first recommend checking to see if the breakaway pin is still intact. If the pin has not been pulled, you will want to begin by checking the trailer connectors for dirt or corrosion on both the inside and outside. Once the breakaway pin and trailer connectors are checked, you will need to start tracing the wires back from the trailer connector while checking for breaks or frays. I would agree with your suspicious that you have a short somewhere on the 12v wire on the trailer's...
view full answer... - Why Would 7-Way Unplug While Towing with a 2015 Chevy Silverado 1500Are you sure you don't have a long enough trailer wiring harness? We haven't had any issues with 7-ways pulling out of the # HM40975 that is the same connector as what you have on your 2015 Chevy Silverado. That makes me think you just may have too short of a harness. Plus, we don't offer a 7-way that will fit the opening on your vehicle that opens up instead of down. For an 11 foot 7-way plug and lead you would want the part # HM20048.
view full answer... - Troubleshooting Trailer Lights Not Functioning On a 1988 Fleetwood TrailerIt sounds like you may have a damaged wire or connection inside your 7-Way Molded Trailer Wire Connector # HM20048 or vehicle side connection. To test this run a jumper wire from a ground connection on your 1988 Fleetwood trailer directly to a ground connection on your 2006 Lexus Rx 400h. This will determine is there is an issue with that portion of wiring or the connector. If you have another trailer with a 7-way or vehicle you can also try them on your trailer and Lexus to determine...
view full answer... - How to Prevent a 12 Volt Power Circuit on a 7-Way from Being Active All the TimeWhat most people use to allow the 12 volt charge wire from being hot all the time and only when the key or the vehicle is on is an isolation solenoid part # TR118665 on the charge wire. You basically run the center pin to a keyed power source and then run one side of the solenoid to the 7-way and the other to the wiring of the truck. If you were wanting to install it on a 4-pole connector that was used strictly for that circuit that is possible too. This wouldn't work through a 7-way...
view full answer... - 7-Way Plug and Lead Recommendation for a Trailer that has a 5-Way Installed on ItSo you have a tow vehicle that has a 7-way connector on it and then a trailer that has a 5-way? What you would need to do is remove the 5-way wiring and install a 7-way with a lead like part # HM20048 which is a 7-way with 11 feet of harness. I attached a picture that has a diagram that has how a 7-way normally wires to a trailer.
view full answer...
- How Long Should Trailer Wiring Stick Out Past The Trailer Tongue?Typically, you want between 16" and 24" of wire to extend past the trailer tongue but it really depends on your particular vehicle and the location of the trailer plug on your vehicle. You want enough wire so that there is not tension on sharp turns, but you don't want too much slack as this could lead to the wires dragging on the ground. Since your 2012 Ford Super Duty has a 7 way connector, you can go with something like Hopkins 7-Way Molded Trailer Wire Connector - 11' # HM20048 which...
view full answer... - How To Install 4 to 7-Way Adapter On 2016 Toyota TacomaIn regards to a 4 to 7-way adapter like the 4 to 7-Way with 4-Way Adapter part # ETBC7, the 4-way plug controls the running lights and stop/turn signal circuits. The other wires separate of the 4-way are for ground (usually white), power (usually black), reverse (usually yellow), and brake output (usually blue). In most cases the reverse wire just gets tapped up as it's not used. If the trailer does not have a battery then same goes for the power wire as well as the blue wire if there are...
view full answer... - How To Install New Trailer Wiring On A 2015 18 Foot TWF TrailerThe wiring of your 7-way connector on your 18' TWF trailer will depend on what standard you are using for your 7-way connector on your 2020 GMC Sierra 1500. This 7-way connector matches your vehicle's wiring. I recommend the Hopkins 7-Way Molded Trailer Wire Connector - 11' Long, part # HM20048. The wires are molded to protect from rust and corrosion. This wire connector has three different wire gauges to match the different currents. I also recommend using dielectric grease, part # 11755,...
view full answer...
- Getting Side Marker Lights to Function as Turn Signals and Running LightsTrailers use what is called a 2-wire system which means the turn signals and brake lights are on the same circuit. When you try to add separate amber turn signals you will need to separate out the brake light signal using a converter, # 118158. On this converter the yellow input wire is for the combined left turn signal and brake light. Green is for the right turn signal and brake light. White is ground. On the output side the yellow wire will be left turn signal only, green is right turn...
view full answer... - How Does the Electric Trailer Jack # JET-5000 Wire to a 7-WayThe Stromberg Carlson Electric Trailer Jack - Drop Leg - A-Frame - 23" Lift - Item # JET-5000 that you referenced only has one wire that runs from it, the power wire. This wire would need to get run to the 12 volt accessory circuit of the 7-way on your trailer's wiring. The jack grounds through the mounting hardware of it so you would not have to run a ground wire. If you only have a 4-way on your trailer you will need to upgrade that to a 7-way like the part # HM20048. I attached a wiring...
view full answer...
- Replacement Axle with Brake Flanges for Rockwood Pop-Up Camper 1940 LTD with 12-Inch WheelsWe do indeed offer complete axle kits that include the axle beam and spindles, electric brake assemblies, hub/drums along with bearings, races, seals, etc but we just do not happen to have a complete 2200-lb kit that will fit your 12-inch rims so we can help you select individual parts. You have the option of having brake flanges welded to your axles (by a certified welder) that would allow you to install drum brake assemblies and new hubs/drums. The linked article describes the items...
view full answer... - Recommended Trailer Hitch for a 2020 Honda CR-VThe trailer hitch I recommend for a 2020 Honda CR-V is the etrailer Trailer Hitch Receiver part # e98848. The etrailer hitch is an excellent option because it has a hidden design which means the cross tube is hidden therefore you will get a factory like appearance which doesn't take away from the overall look of the vehicle. This also makes for the best ground clearance so you won't have issues with steep driveways. I have attached an install photo for you. If you will be using the trailer...
view full answer...
- Can 12 Volt Accessory Circuit of 7-Way on Vehicle be ActivatedThe black wire/12 volt accessory circuit of trailer wiring isn't always active as not every trailer needs this circuit and since it's always active it can potentially short easier. So on your vehicle you can activate it pretty easily by running 10 gauge wire like part # 10-1-1 which we sell by the foot from the vehicle's positive battery post through a breaker like the # 9510.
view full answer... - Recommended SAE Wired 7 way Trailer PlugYou can wire the Hopkins 7 Way Molded Trailer Plug # HM20048 in whichever manner you see fit- the colored wires in the loom are color coded to make it easy for you to know which pin/blade they're connected to, so you shouldn't need to disassemble but just connect the wires from your trailer circuits to whichever color wire corresponds to the pin you want. You shouldn't need to cut anything or disassemble the cord as much as just change which wires you connect to which circuit. If you're...
view full answer... - Which Wire on a Trailer Brake Magnet is the Power and Which is GroundTrailer brake magnets have two wires ran to them. Either can be used as the positive side as long as the other is grounded. To test your magnets you would want to apply 12 volts to one of the wires and ground the other wire. You should hear them grab the drum and start humming. For a replacement breakaway switch you could use the # 2005-P. For an 11 foot 7-way that you could wire your trailer to you would want the part # HM20048. You will need to attach the current wires of your trailer...
view full answer... - Comparing the Bargman 7-Way RV-Style Connector to Hopkins 7-Way Trailer Wire ConnectorThe only difference between the Bargman # 50-67-005 and # 54006-059 is the insulation. The # 54006-059 has heavy silicon insulation that is rated for use in temperatures as low as -67 F. As for the connection on the Bargman vs. the Hopkins # HM20048 it is going to provide the same connection, there is no real difference aside from the style. The only difference you will find overall is that the Hopkins has a length of 11' while the two Bargman connectors have a length of 10'. I have...
view full answer... - How To Charge On Board Trailer Battery with 7-Way On Tow VehicleYes, the battery charge line circuit which is usually a black wire can be used to charge an on-board trailer battery. The best way to do this is by running a wire from the trailer junction box to the battery. If you don't have a junction box I recommend upgrading to the Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector part # 277-000141. The size of wire used to run to the battery will need to be a minimum of 10 gauge part # 10-1-1
view full answer... - Recommended Brake Controller For A 2009 Toyota SiennaWhen it comes to installing a brake controller on your 2009 Toyota Sienna you would first need to make the 4 flat connector into a 7 pin connecter. The Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7 will plug into the existing 4-way trailer connector on the vehicle. There will be three extra wires included: Black - 12 Volt Hot Lead Blue - Electric Brakes White - Ground Using the # ETBC7 will give you both access to a 4 flat and...
view full answer... - Trailer Lights & Brakes Are Not WorkingIt isn't the breakaway battery as that doesn't factor into the power of any of your lights or your electric brakes. The issue is either with the wiring itself or your 7-way trailer connector. So start by checking out the wiring, specifically the grounds, on your trailer to see if there is any damaged wiring, and that your ground are connected to clean, bare metal surfaces. If that is fine, it is almost certainly the 7-way connector being damaged or corroded and you will need to replace...
view full answer...
Do you have a question about this Trailer Wiring?
Why etrailer.com?
At etrailer.com we guarantee:Highest quality trailer wiring for the best price.
Our Lowest Price Pledge ensures you will never overpay for the parts you need.Real product know-how.
We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.Most detailed, accurate trailer wiring information available.
Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.Installations, made easy.
We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.Fast shipping.
Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.Personalized service for life.
We provide one-on-one, personalized service from the ordering process through the life of your product.Trusted since 1946.
We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.Returns Policy
Need to return an item? No problem. Please read our Returns Policy for more information.
Info for this part was:
Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Jacob T
Written by:
Laura H
Updated by:
Wilson B
Updated by:
Alexander C
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.