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Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard

Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard

Item # H20046
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Replace your damaged 7-way, RV-style, trailer-end connector with this molded cable. Durable cable covering resists damage. Wiring codes are RV standard. Lowest Prices for the best trailer wiring from Hopkins. Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard part number H20046 can be ordered online at or call 1-800-940-8924 for expert service.
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Hopkins Trailer Wiring - H20046

  • Trailer Connectors
  • Trailer End Connector
  • 7 Round - Blade
  • Plug and Lead
  • 6 - 10 Feet Long
  • Hopkins

Replace your damaged 7-way, RV-style, trailer-end connector with this molded cable. Durable cable covering resists damage. Wiring codes are RV standard.


  • Pre-wired, 7-way, blade-style, trailer-end connector allows you to connect your trailer to your vehicle
  • Easy-to-grip tabs allow for simple plug in and disconnect
  • Flexible cable allows for easy positioning
  • Molded cable sleeving protects wires
    • Durable covering is insulated and corrosion resistant
  • Simple installation
    • Hardwire to existing trailer wiring
  • Meets SAE standards


  • Cable length: 8'
  • Wire gauges:
    • 14 Gauge - Red, brown, green, and yellow
    • 12 Gauge - Blue
    • 10 Gauge - White and black
  • 90-Day limited warranty

Wiring Code
Molded Connector Function Usual Trailer Wire
White Wire Ground White Wire
Red Wire Left Turn and Brake Yellow Wire
Brown Wire Right Turn and Brake Green Wire
Green Wire Tail Lights Brown Wire
Blue Wire Brake Power Blue Wire
Black Wire Aux. Black Wire
Yellow Wire Reverse Lights Purple Wire

20047 Hopkins 7-Way Molded Trailer Wire Connector, 8' Long

Replaces 20246

Installation Details H20046 Installation instructions

California residents: click here

Customer Reviews

Hopkins 7-Way RV Style Connector with Molded Cable - Trailer End - 8' Long - RV Standard - H20046

Average Customer Rating:  4.8 out of 5 stars   (704 Customer Reviews)

Replace your damaged 7-way, RV-style, trailer-end connector with this molded cable. Durable cable covering resists damage. Wiring codes are RV standard.


Been very happy with the 90 degree wiring harness over the past year. It saved running the 7 pin connector over the tailgate. Replacing the 7 pin connector with new Junction box helped in cleaning up the mess in the old box. The new 7 pin wiring harness is lighter & more flexible. All 3 products are still working well and have saved me time & functionality.


Bulletproof. I will order this again for future projects.


I installed this Hopkins connector cable on my 2003 Jayco 12 Sd popup camper because I replaced hydraulic brakes on it with the electric brakes. Needed some extra wires. Four were not enough to operate the lights and electric brakes. Installation was quick. I had to match wires on the trailer with cable wires. Cable looks great and so far it works great. We just checked out on our first camping trip this year.


My wire harness was easy to install, looked great and performed great. One year later and it still looks and performs great! I definitely recommend to anyone building their own trailer or are looking to upgrade to better wiring! My homemade trailer was a great success, thanks to!


Needed a new pigtail due to a short in my cable from wear. Spliced it in with the 7pin junction box and back on the road.


I was a little worried about this 7 wire cable because the price was quite a bit lower that the other products. But I was totally wrong about it. This is a very high quality and heavy duty product.I will buy another one for my Dad's cargo trailer.


Nice heavy duty. The cable jacket does shrink back from the plug a bit over time. I wish they were available with the other 7-way color scheme.


Pros: Best wire gauge in a 7 pin connector I could find.

Cons: reverse lights (red), left turn (yellow), right turn (green), and running light (brown) and not wired correctly in the plug for their respective wire colors.

I bought this for a sealed plug with good gauge wire to help save some time. What I got was a total headache trying to find out the problem of why it was not working correctly. This might not have been so bad had it not been on a new to me truck that I was not so trusting of the wiring in it. So I wound up looking at the truck first not thinking the plug would be wired incorrectly.

Be warned.


Could not get any easier to install, the wires were color coded as the wires on my enclosed car trailer


Are use the wiring harness to add brake lights turn signals and back up lights and running lights to my bicycle carrier I’ve added to my recreational vehicle

I had also purchased the combo light package from the trailer and it’s really nice to know vehicles behind me know what I’m doing when I’m turning stopping and it’s really great to see the extra light when I back up at night

The back up tail light system that I purchased from Arkins as been working out well staying waterproof and I enjoy the additional back up lighting when pulling the RV into a dark campsite
Paul A - 06/04/2021


Received the connector and attached wiring harness in a timely manner. Product was just as described and of very good quality. Will be an easy replacement for my old weathered car trailer connector.


Great quality on this overmolded harness. Various/appropriate AWG wires for each pin. Looks like it w/last a long time.


I recently ordered this power cord for my travel trailer as my original cord became corroded and difficult to engage into the tow vehicle plug. It is not hard to tell the replacement cord is far superior to the original, fit and finish is great and slides into the receptacle with ease. Installation was a no-brainer, took me about an hour. When I originally ordered the cord, I ordered a cord 1 foot shorter than the original. I gave etrailer (Rebecca) a quick call and she cancelled the original order and got me the cord I needed with no delay -- Thank you Rebecca.

Still works great.
Grant R - 06/05/2021


Received it today and I have it installed. Easy to install and very satisfied with your product. Thank you


Order took a long time to arrive but was exactly what we ordered when it did get here. I understand the challenge is a shortage of labor at the distribution center.


Etrailer was Johnny on the spot , got what I ordered in 3 days , great service . I’ll sure buy from them in the future . Thank you etrailer


Exact replacement for my 2018 Keystone Springdale. Good purchase- I carry a spare, seems like these cords only get damaged after dark!


Great company, fast shipping and they will call u if there is a problem.


I am replacing the trailer connection wiring harness as part of the brake system. My 5th wheel trailer is now 10 years old so this is a preventive maintenance step in the process. Hopefully with new wheel/brake parts my trailer brakes will work better.
Thanks and Rebecca for great support.


Had some real issues with this one. Should have noticed when purchasing this harness is not wired using standard truck/trailer color format. Other than that it went together fairly nice. If the connector would come apart I was thinking of fixing the wiring my self.


I ordered this for my husband. He replaced the worn wiring on our fifth wheel. It worked out great.


Still working well one year later


Worked well and shipped in a timely man ner


Thanks for your help with parts for my trailer build. My wife and I are still making custom cabinets out of curly maple. We hope to finish this winter. We have taken it out 7 times this season. Thanks again.


Perfect for connecting the tail lights from my RV to my car on the car dolly.

Show More Reviews

Ask the Experts about this Hopkins Trailer Wiring

  • What is the outer Diameter of the Cable on 7-Way Molded Trailer Wire Connector, # H20046
    I went out to the warehouse and grabbed a 7-Way Molded Trailer Wire Connector # H20046 to measure it for you. I used a set of digital calipers to get an accurate measurement. The diameter of the outer black sheath is 0.59 inches or 19/32 of an inch. A hole 5/8 of an inch would be perfect for this size cable. I have included a link to a video review of this connector for you.
    view full answer...
  • What is the Function of the Yellow/Brown Wire on a Trailer
    Your yellow/brown wire most likely ties into the brown running light wire. Typically, when a trailer has a green/brown wire and a yellow/brown wire, they are both used for the running light circuit. The green/brown wire is ran down the right side of the trailer and the yellow/brown wire is ran down the left side of the trailer for the tail lights and marker lights. This prevents the need from running jumper wires across the trailer for the running lights. If your trailer is setup this way,...
    view full answer...
  • How to Wire a Hopkins 7-Way Trailer Connector # H20046 1987 Layton RV Trailer
    There are standard colors for trailer wiring, but not everyone will follow those guidelines and since your trailer is older it is likely that the colors are different. The best way to wire up your trailer with this 7-Way Molded Trailer Wire Connector # H20046 would be to test all the functions of the wiring on your trailer and then wire the # H20046 to it by function. I attached a review video for this product and an FAQ on trailer wiring for you to check out. I also attached a picture...
    view full answer...
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  • Mounting Two Trailer Stop, Turn and Marker Lights on Each Side of a Trailer
    If you are using two stop/turn/marker lights on each side of the trailer, the only signal you will be able to separate out is the taillight signal. Trailers in the United States use a combined stop and turn signal so you would not be able to separate them to wire one light turn and marker and the other light brake and marker or brake turn and marker. You would essentially have two options. One light on each side stop/turn/tail and the other taillight only, or one light stop/turn only and...
    view full answer...
  • Should 12 Volt Power from a Trailer Battery to Interior Lights be Circuit Protected
    Having a fuse or circuit breaker in line to the interior light wiring or any 12 volt accessory is not going to hurt anything and would add extra protection to other electrical items on the trailer and vehicle. You will just want to avoid using a fuse or circuit breaker that is rated way higher than what the accessory actually draws. For example if the interior lights draw 10 amps you would not use a 20 amp fuse because in a short circuit situation the fuse would not blow to protect the...
    view full answer...
  • How to Ground Trailer Brakes on an Aluminum Trailer
    On an aluminum trailer I would recommend you ground the brakes by running the ground wire back up to the ground circuit of the connector on the trailer. Aluminum frames do not make the best ground points so I wouldn't ground the assemblies to the frame. You would most likely have pretty weak braking performance if you did. I attached an FAQ on wiring that you might find helpful also.
    view full answer...
  • What Gauge Wire Should be Used to Wire Trailer Brakes
    That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary. On a smaller trailer with a single axle of brakes 12 gauge wire would probably be enough. But for a longer tandem axle trailer I would recommend you run 10 gauge wire to all the assemblies just to minimize the amount of resistance that would be on...
    view full answer...
  • How To Wire In a 7-way to Replace a Boat Trailer 5-Way Flat
    You definitely could install the 7-Way Molded Trailer Wire Connector # H20046 in place of the 5-way that is installed on your trailer currently. The colors wouldn't match up exactly. White would go to white, you would run both brown wires to the single green wire of the 7-way. Yellow of your trailer would go to the red wire of the 7-way, and green of the trailer wiring would go to brown of the 7-way. Now without knowing where the red wires of the 5-way go it's hard to say for certain....
    view full answer...
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  • How to Test the Functions of Trailer Tail Light Circuits
    The easiest way to test the functions of the taillight wiring on a trailer is to use a jumper wire. You will touch one end of the jumper wire to the positive post of a 12 volt vehicle battery and then touch the other end of the wire to all of the different wires to see what circuits illuminate. The other option would be to trace the wires back to see where they terminate.
    view full answer...
  • Wire Function by Color on the Hopkins 7-way Trailer Connector
    The Hopkins 7-way Trailer Connector # H20046 does not include instructions however all you'll really need to know is the wire function by color on the harness: White - Ground Red - Left turn and brake Brown - Right turn and brake Green - Tail Blue - Brake power Black - 12 Volt Yellow - Aux I've attached a help article on wiring for you. You'll want to wire the harness by function instead of just matching the colors since your trailer very well may be different. I've also attached a...
    view full answer...
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  • Troubleshooting Weak Ground When Installing Ram A-Frame 3,500-lb Electric Jack
    Your jack circuit breaker should be installed on the +12V wire that goes to the positive battery terminal. If your jack lights operate but the jack motor does not this tends to suggest that your problem is a weak ground connection. Weak grounds can often pass enough power to allow some low-power-draw functions like lights to work properly but will not pass enough current to operate the power-hungry jack motor. You can test this easily by applying your charged battery's power direct to...
    view full answer...
  • 7-Way Trailer Connector Sparked When It Touched Bare Bolt Of Trailer
    The 12V power connection on the plug does go directly to your trailer battery positive terminal. So it completed the circuit when it touched the grounded bolt on your trailer. This is not uncommon, so I suggest you just be a little more careful when putting the plug away. Your trailer wiring is working as it should. The trailer wiring is run from your vehicle, but that trailer battery will still give you that charge when the circuit is completed.
    view full answer...
  • Wire Functions Of 7-Way Molded Trailer Pigtail
    For the Hopkins 7-Way Molded Trailer Wire Connector, 8' Long # H20046 the functions are prewired for you and color coded in the following way (which is a little confusing): White Wire is your Ground (traditional White Wire) Red Wire is your Left Turn and Brake (traditional Yellow Wire) Brown Wire is your Right Turn and Brake (traditional Green Wire) Green Wire is your Tail Lights (traditional Brown Wire) Blue Wire is Brake Power (traditional Blue Wire) Black Wire is 12 volt hot lead (traditional...
    view full answer...
  • Troubleshooting 7-Way Wiring Harness Lighting Issues
    I suggest you test the trailer lights directly, without connecting the trailer to any vehicle, by applying power from a 12V battery. You can use a well-charged spare 12V battery if you have one around or you can use a set of jumper cables to draw power from your vehicle battery and then use short wire leads from the cable clamps to the trailer plug. What you want to do is secure the battery negative to the trailer plug's ground pin. Then one by one you can test each lighting circuit on...
    view full answer...
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  • Trail Diagram Recommendation for Replacing Trailer 6-Way with 7-Way
    I attached two diagrams for you to check out. One that shows how a 6-way wires up and another that shows how a 7-way wires up for you to use to replace the connector with a 7-way like the part # H20046.
    view full answer...
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  • How to Wire Trailer Light to Trailer with Unknown Trailer Wiring Color Functions
    The colors your trailer has are not standard colors so your best option would be to use a jumper wire from a 12 volt battery to each of the wires to determine their function and then wire by function.
    view full answer...
  • Will Trailer Lighting Circuit Still Work with 7-Way if Brake Controller isn't Used
    Yes, the lighting functions of a trailer 7-way will be fully functional regardless of if a brake controller is installed/functional. The circuits are totally separate. There are many people who use 7-way trailer wiring setups without a brake controller and lighting all works fine.
    view full answer...
  • How to Test to Determine Unknown Wire Color Functions of Trailer Wiring
    Orange and gray are not standard trailer wiring colors so you'll need to do some testing to verify what those circuits carry. What you'll need to do is use a jumper wire from the positive pin of a 12 volt car battery to apply voltage to all of the wires to see which trailer circuits apply. The one that sparks when the connection is touched is the ground. For a new 7-way though we have the # H20046 which I attached a chart that shows how this gets wired as well by color.
    view full answer...
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  • How to Identify Ground Circuit of 7-Way Trailer Wiring That Uses Non-Standard Colors
    If you check out the diagram I attached for a trailer 7-way you'll see that the pin in the 7:00 position should be the ground. Since your wiring uses non-standard colors this would be the easiest way to identify it.
    view full answer...
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  • Where Does Yellow Wire of Trailer Wiring Connect to on 7-Way Wiring
    I attached a picture for you to use as a guide for wiring in your trailer's 4-way wiring to a 7-way socket connector. The yellow wire is the left turn/stop circuit that you have out of the connector.
    view full answer...
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  • Are 7-Way Trailer Harnesses Installed without Being Fully Functional
    I wouldn't say that's standard practice. There are many times though that people will install a 7-way and will only activate the circuits that are needed and leave off ones that aren't. If the trailer doesn't have brakes they'll leave that circuit open or if there's no need for a 12 volt accessory or reverse light circuit. If your trailer has brakes and they knew you wanted to install a 7-way to activate them I'd say they aren't being totally honest if they only wired up the lights.
    view full answer...
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  • What are Two Standard 7-Way Wiring Color Diagrams
    For trailer 7-ways there are two wiring color standards that are commonly seen. I attached a picture that shows the difference. Typically red and black are not interchanged though. Sometimes red and yellow are for left turn/stop signal. That said not all people will use standard trailer wiring colors so you might have non standard colors used.
    view full answer...
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  • Troubleshooting 5th Wheel Right Turn Signal Working Without Being Hooked up to Tow Vehicle
    If your right turn circuit is showing power when your 5th wheel isn't connected to your tow vehicle it sounds like you have some circuits that are crossing over. Try disconnecting whatever power source you have on your 5th wheel whether it is being connected to the campsite power or a battery on your trailer and you should see the power disappear. If this is the case then you need to inspect the wiring for your right turn signal and look for where it may be receiving power. This would...
    view full answer...
  • Troubleshooting Trailer Wiring Running Light that Wants to Stay On When Connected to Tow Vehicle
    Something might got miss-wired most likely when you replaced the old 7-way with the part # H20046. Since there are two different color codes for 7-way trailer wiring this isn't super rare. Check out the diagram I attached that shows how the two styles get wired. This connector uses the RV Standard style in the center pic. It's also possible your running light circuit is somehow shorted to the 12 volt power circuit as well. Which isn't hard to do since the pins are right next to each other...
    view full answer...
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