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Hopkins 7-Way Molded Trailer Wire Connector - 11' Long

Hopkins 7-Way Molded Trailer Wire Connector - 11' Long

Item # HM20048
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Hopkins Trailer Connectors - HM20048
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This molded, 7-way, RV-style, trailer-end connector lets you replace a damaged wiring harness on your trailer. Lowest Prices for the best wiring from Hopkins. Hopkins 7-Way Molded Trailer Wire Connector - 11' Long part number HM20048 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (78)
  • Q & A (25)
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  • Why etrailer?

Hopkins Wiring - HM20048

  • Trailer Connectors
  • Trailer End Connector
  • 7 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   (78 Customer Reviews)

This molded, 7-way, RV-style, trailer-end connector lets you replace a damaged wiring harness on your trailer.

- HM20048
by:

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.



- HM20048
by:

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



- HM20048
by:

I'm sold on etrailer.com service, from ordering right on through after sale follow-up by the sales staff. Great job, great experience!



- HM20048
by:

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



- HM20048
by:

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 - 08/05/2017



- HM20048
by:

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 - 08/27/2018



- HM20048
by:

Perfect product for what I needed!



- HM20048
by:

Sealed end is well done. Outside covering is more than adequate.



- HM20048
by:

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.



- HM20048
by:

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.
-- Etrailer Expert Laura E - 07/15/2017


- HM20048
by:

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 - 06/25/2019



- HM20048
by:

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!



- HM20048
by:

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 - 08/22/2017



- HM20048
by:

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 - 08/22/2017



- HM20048
by:

This product has worked great so far! I used this to replace my factory cord on my 2011 Airstream. My tow vehicle is a 2013 F250 and the plug works perfectly.



- HM20048
by:

Used it to replace my car trailer wiring that a buddy destroyed. Excellent product that has held up to all seasons including a week of -10 degree temperatures and over 50" of snow. Excellent quality and materials.



- HM20048
by:

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.
-- Etrailer Expert Mike L - 09/10/2018


- HM20048
by:

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.



- HM20048
by:

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.



- HM20048
by:

Works just like it should.



- HM20048
by:

Great addition



- HM20048
by:

Great product, well made. After 22 years old product needed replacing and new product far exceeded my expectations. Product being used on an enclosed snowmobile trailer.



- HM20048
by:

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 - 02/23/2019



- HM20048
by:

Very high quality. It's been outside fur a year, and looks brand new.



- HM20048
by:

Great product


25
78
Show More Reviews

Ask the Experts about this Hopkins Wiring

  • Can 12 Volt Accessory Circuit of 7-Way on Vehicle be Activated
    The 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...
  • 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...
  • Parts Needed for 7 Way Connector to Put on 17 Foot Long Food Truck
    It sounds like you're looking for a 7 way trailer side connector. The Hopkins # HM20048 you were looking at is going to be 11 feet long, so it's not quite what you're looking for. The longest 7 way trailer side connector we have available is the 18 foot long Bargman # 50-67-106, which will connect to the 7 way connector on your 2007 Toyota Tundra. If you need to, you can make up any distance you need to on your food trailer with either 10 gauge wiring # 10-1-1 or 12 gauge wiring # 12-1-1;...
    view full answer...
  • 7-Way Plug and Lead Recommendation for a Trailer that has a 5-Way Installed on It
    So 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...
    Image 1 for
  • Installing HM20048 Molded 7-Way Trailer Connector on Surge Brake Equipped Boat Trailer
    If you scroll to the bottom of the product page of the # HM20048 connector, you can see the color code chart that shows which colored wire carries which function. The yellow wire on the # HM20048 would carry the signal from the reverse lights, assuming that the center pin of the trailer connector is tied into the reverse lamp circuit. Since you're using a surge brake system, you won't need the blue wire as you suspected. If the trailer doesn't have a battery or any accessories that require...
    view full answer...
    Image 1 for
  • Which Wire on a Trailer Brake Magnet is the Power and Which is Ground
    Trailer 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...
  • How to Prevent a 12 Volt Power Circuit on a 7-Way from Being Active All the Time
    What 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...
  • What is Function of Black Wire on Trailer 7-Way part # HM20048
    The 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...
  • Getting Side Marker Lights to Function as Turn Signals and Running Lights
    Trailers 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...
    view full answer...
  • What Would Cause Constant Power To Electric Brakes
    I 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...
  • Recommended SAE Wired 7 way Trailer Plug
    You 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...
  • 7-Way and Light Kit Recommendation for Boat Trailer
    The cleanest way to install the # HM20048 would be to use a junction box like part # 38656. The junction box is weatherproof to protect the wiring connections from the elements. You'd also need some ring terminals, one 10 gauge # DW05741-1 and four 14 gauge, part # DW05702-1. I've linked you to a video showing the junction box being installed. The part # TLL36RK is a submersible trailer wiring kit that would work well on your trailer as well.
    view full answer...
  • Trailer Lights & Brakes Are Not Working
    It 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...
  • 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...
  • What is the Diameter of the Cable on Hopkins 7-Way Molded Trailer Wire Connector # HM20048
    On 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...
  • Why Would 7-Way Unplug While Towing with a 2015 Chevy Silverado 1500
    Are 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...
  • Installing 7-Way Trailer Plug on Trailer with Electric Brakes
    I recommend the Hopkins 7-way molded trailer wire connector # H20044. It will measure 6-feet long and provide you the functions required for your electric brakes. If you prefer a longer connector, the same item is available in an 8 foot length as part # H20036 or an 11 foot length as part # HM20048. Please note that the color codes on these molded connectors are different from those usually found on a trailer. The wiring code is on each of the product pages. If you don't have some...
    view full answer...
    Image 1 for
  • Installing Trailer Connector and Junction Box on 20ft Gooseneck Trailer
    If you click on the link I've provided, you can see our Trailer Wiring FAQ article, which will show you exactly how the connector on your gooseneck trailer should be wired. I took the liberty of looking in on your order, and saw that you're using a # HM20048 wiring connector and a junction box, which is exactly what I'd recommend. I've provided a wire color code chart for the # HM20048 connector. I've also linked you to an install video for the junction box, which will show you exactly...
    view full answer...
    Image 1 for
  • How to Run a Reverse Lamp Circuit on a Travel Trailer
    Well, that will depend on what your definition of nightmare is. Since you're speaking of a travel trailer, I'll assume the trailer uses a 7-way trailer connector. The first thing you'll want to do is to make sure the reverse lamp circuit is active on the car's trailer connector. Use a circuit tester like # 40376 and test the center pin on the connector as the vehicle is shifted into reverse. The pin should power up. Then, you'll need to see if the 7-way on the trailer is accessible...
    view full answer...
  • Replacement Axle with Brake Flanges for Rockwood Pop-Up Camper 1940 LTD with 12-Inch Wheels
    We 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...
  • Determining The Correct Replacement Axle For 2012 Aliner Classic Camper
    It is possible that the Dexter Trailer Axle w/ Idler Hubs - EZ-Lube - 5 on 4-1/2 Bolt Pattern - 72" Long - 2,000 lbs # 20545I-EZ-72-15 you were looking at will fit your 2012 Aliner Classic Camper but the only way to be sure it to measure your current axle, and find the axle rating of your current axle. Starting with the measurements you will need to know the hub face to hub face and spring center to spring center measurements. For example the # 20545I-EZ-72-15 has a hub face to hub face...
    view full answer...
    Image 1 for
  • Comparing the Bargman 7-Way RV-Style Connector to Hopkins 7-Way Trailer Wire Connector
    The 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 Does the Husky Brute Electric Trailer Jack # HT87247 Wire to a 7-Way
    The Husky Brute Electric Trailer Jack # HT87247 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 diagram that shows how the 7-way would...
    view full answer...
    Image 1 for
  • Parts Needed to Convert 10 Inch Hydraulic Trailer Brakes to Electric Brakes
    The first thing to check are the drums. Some drums can be used with both electric and hydraulic drums but not all of them. It may indicate if they work with both on the actual drum. If you are not sure then it is safer to also replace the hub and drum assemblies. I will cover that below. If the drums are compatible with electric brakes then the 10 inch etrailer brakes, # AKEBRK-35-SA, will work if the brake mounting flanges the brakes attach to have the 4-bolt mounting pattern. You...
    view full answer...
  • Adding Electric Trailer Brakes To Trailer With 10 Hydraulic Drum Brakes
    I would be happy to help! Based on the spindle information you provide and the markings on the hub your hub uses 10" braking assemblies and you could use Hydraulic Trailer Brake Kit - Uni-Servo - Free Backing - 10" - Left/Right Hand - 3,500 lbs # AKFBBRK-35 for a replacement. If your current mounting hardware is in bad shape you will need # BRKH10B as well. Now to change over to electric brakes you would need to use electric trailer brake assemblies # AKEBRK-35-SA, and brake mounting...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Written by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C

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