1. Wiring
  2. etrailer
  3. Trailer Connectors
  4. Junction Box
  5. Trailer End Connector
  6. 7 Blade
etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector

etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector

Item # e99011
lowest price pledge
Our Price: $53.02
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 3 lbs
Quantity: 
In Stock
etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector Plug and Lead E99011
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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.

Product Images

This kit includes a junction box so you can quickly and easily connect the wires from the included trailer connector to your trailer's wiring. Lowest Prices for the best wiring from etrailer. etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector part number e99011 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (23)
  • Q & A (259)
  • Videos (1)
  • Photos
  • Why etrailer?

etrailer Wiring - e99011

  • Trailer Connectors
  • Junction Box
  • Trailer End Connector
  • 7 Blade
  • Plug and Lead
  • etrailer
  • 0 - 5 Feet Long

This kit includes a junction box so you can quickly and easily connect the wires from the included trailer connector to your trailer's wiring.


Features:

  • Kit allows you to upgrade from a 4-way, 5-way, or 6-way connector to a 7-way connector
  • Pre-wired, 7-way, blade-style, trailer-end connector lets you connect your trailer to your vehicle
    • Flexible cable allows for easy positioning
  • Weatherproof, heavy-duty plastic junction box protects wires and terminals from the elements
  • Ring terminals included


Specs:

  • Overall box dimensions: 8-1/8" long x 3-3/8" wide x 2-3/8" tall
    • Distance between mounting holes (on center): 7-3/8"
  • Lid dimensions: 6-5/8" long x 3" wide
  • Cord dimensions: 60" long x 5/8" diameter


e99011 etrailer Trailer Wiring Junction Box with Plug - 7-Way





Video of etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector

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




Video Transcript for Review of etrailer Trailer Wiring Connectors - 7-Way Junction Box RV-Style Connector - e99011

Ellen: Hey everyone. I'm Ellen here at etrailer.com and we're going to be taking a quick look at the etrailer brand 7 Pole plus Junction Box. This is a really nice way to replace the existing wiring or maybe add wiring to your trailer so that you can use all the electrical functions, your lights can work, your brakes, all that good stuff. It comes all together. The wiring is already in place for that 7 pole cord on the outside here. So you don't have to worry about running that.

I'll go over what those functions are and also what comes in the box. But I think those things are a really nice way to replace that wiring and takes a little bit of the work off of you. So let's take a closer look.On the inside, well, first let's take a look at the lid. It does have a nice deep set groove there that's going to help to keep any water out of the box. And there's also grommets that it comes with.

There's going to be a couple solid and then several pass through grommets so you can switch those out as you like to help you do your wiring. Here's our pass through grommets. So if you have a bunch of wires that are going to be coming in and out or bigger wires, this makes a really nice way to get those in there. The solid grommets you can cut through if you just have a single wire that you want to attach, or a couple of smaller wires that are coming in there and still keep that hole relatively small so that you don't have any dirt or debris getting in there.It's also going to come with four 12 to 10 gauge wire ring terminals, and then 10 16 to 14 gauge ring terminals. Those all fit onto the posts here.

So you can attach those to any wires you want to bring in, make your connections there.As far as the functions of the box, this is set up in the RV standard configuration as far as the color coordination. So that pretty much means that we're going to have 7 different colors here, white, black, yellow, red, green, brown, and blue. Black is going to be our 12 volt power. Those are pretty universal. Yellow in this application, if you're matching it up, would be your auxiliary or your reverse signal.

Red is your left brake and turn signal. The green is your tail or your running lights. Brown is your right stop and turn. And then blue would be your trailer brakes. So again, that corresponds with RV standard. There might be some applications where that would be a little bit different, but typically that's going to be what the wiring is.Doesn't really matter what post goes where. You just want to make sure that you're matching things up so keeping everything color coordinated as much as possible helps to keep it clearer what's going to what without having to test everything every time. That's the best way to do it when you do replace anything, or if you're adding anything in there is to use a tester so you're sure, but having that color coordination just makes it a lot simpler for yourself or anybody else who might be working on the trailer later.That's pretty much all there is to it on the inside of that box there. There are a couple of clamps on the ends to help hold any wire in place. You can see that on our 7 pole wiring coming in to the box. So that helps to keep that secure, helps from the wires from getting pulled out or anything like that, and keeps them in place.This does come with two screws to attach the lid to the box. But as far as the hardware to mount the box to your trailer, you will have to pick that up on your own. It doesn't really include anything to do that. Depends on where you're going to be mounting it as far as that goes.And then one last thing I wanted to let you know, are the measurements. So the box itself, going from the outer edges of those flanges where it's going to be mounted, that's about eight and an eighth inch apart. Side to side is about three and three eighths inches. And then top to bottom, it's about two and three eighths inches. Without those flanges on either side of the box is about six and five eighths of an inch. And then the distance between those mounting holes center to center is 7 and three eighths inches apart. We get about five feet of wire. So it should be a good amount of length to get that put in place. And that's really about all there is to it.So I hope this video has been helpful in deciding if this is going to be the right fit for your trailer. Again, I'm Ellen here at etrailer.com. Thanks for watching.


Customer Reviews

etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector - e99011

Average Customer Rating:  4.9 out of 5 stars   (23 Customer Reviews)

This kit includes a junction box so you can quickly and easily connect the wires from the included trailer connector to your trailer's wiring.

- e99011
by:

897487



- e99011
by:

Good quality Easy installation Works great 894411



- e99011
by:

Should be perfect. Quick delivery. Thank you. 891810



- e99011
by:

877998



- e99011
by:

My second one. Great product. 876958



- e99011
by:

Replaced wiring and added electric brakes to my utility trailer, Cord and Junction made sort work out of that part of the job. Has been test and trailer is ready to use. 875540



- e99011
by:

This wiring kit was very easy to install. The only issues I encountered is that I was installing the lights on a motorcycle "tray" so when I positioned the box so the cable would point is the best direction the cover was not ambidextrous and now the etrailer Logo is upside down ;-( 872900



- e99011
by:

Very nice part. Just what I was looking for. 869801



- e99011
by:

As promised 867821



- e99011
by:

Have not gotten to install yet but looks great and even comes with eyelet connectors for my wires from the trailer. Every time i buy something from etrailer i get more than i thought i was going to. 867656



- e99011
by:

Good quality. 865975



- e99011
by:

Like the junction box feature goods qua lity 857955



- e99011
by:

I like the fact that I can now add wiring to the trailer without having to splice into the wire harness. Next thing will be to install a new trailer emergency brake controller. Etrailer.com was very helpful on keeping me notified on when this item was in stock. It was on backorder. 856919



- e99011
by:

really good for the price and easy to i nstall 854406



- e99011
by:

This is a great product. It got rid of a whole bunch of splice connections that often cause light problems. Well worth it 853797



- e99011
by:

well made product 853153



- e99011
by:

Excellent service. Ordered these items to restore an old gooseneck trailer. Did a complete restoration that included sand blasting, repaint, and upgrading to bulldog insert instead of the old style 4" ball and pin. Thanks etrailer! 785710



- e99011
by:

Good product. I like the molded on plug will keep water and debris out of the plug. Cord is a little long for my application but I was able to secure it within the trailer frame. Easy to install, color coding makes making connections real easy. No seal on the cover so we will see how well water stays out, there is a groove in the cover so hopefully it fits tight enough to keep water out. 777875



- e99011
by:

Product was exactly what I needed to make wiring a trailer simply. Deliver was prompt!! 775709



- e99011
by:

Good product and worked great for my pontoon trailer application. 774982



- e99011
by:

Thanks for the promptness, service was great 773897



- e99011
by:

Would buy another if needed. 771748



- e99011
by:

Nut came cross threaded on green terminal. Other than that looks good. 771474


23
23

Ask the Experts about this etrailer Wiring

  • Re-Wiring Trailer for Tail Lights and Electric Brakes
    To completely rewire your trailer I recommend using the Trailer Wiring Kit # e99011. This includes a 7-Way connector, a junction box to provide you with a clean setup, and all the necessary hardware. You will then just need additional 16 gauge wiring # 16-4B-1 for the light circuits and 10 gauge wiring # 10-1-1 for the brake and 12V power wires, both of which are sold by the foot. I have attached a great install video along with a standard trailer wiring diagram that you can use for...
    view full answer...
  • Does the Brake Output Wire Get Attached to a 12 Volt Trailer Battery
    In order to rewire your trailer, I strongly recommend you use the Trailer Wiring 7-Way Upgrade Kit part # e99011 with the Bonded 4 Wire part # 16-4B-1. This is going to ensure you have all the correct wire gauge and the junction box makes for a clean install as well as an easy way to troubleshoot if you ever have issues. In regards to the brake output wire part # 10-1-1, this will receive power from the tow vehicle's brake controller via the 7-way, not a battery during normal braking. However,...
    view full answer...
  • Organizing the Wiring on a Gooseneck Horse Trailer with a 7-Way
    If you check out the attached picture it shows how the wiring on a trailer should look. If you already have all of the wiring that you need for a 7-Way and you are just wanting a way to organize it then I recommend installing the Trailer Wiring 7-Way Upgrade Kit # e99011. This kit includes a junction box and ring terminals which make connecting the wiring to a 7-Way connector very easy and helps to keep things organized. The installation locations are labeled to help take the guesswork...
    view full answer...
  • Wiring Kit to Convert Trailer Wiring to 7-Way Format
    Trailer Wiring 7-Way Upgrade Kit # e99011 allows a trailer's existing 4-pole, 5-pole or 6-pole wiring to be re-formatted to the 7-way RV standard to match the 7-way socket on your Silverado. The kit includes a male trailer plug and cable, hardware and ring terminals to allow you to wire both the male plug/cable's leads and the existing trailer wires together inside the included junction box. The kit also includes protective wire loom to keep any exposed trailer wiring protected from road...
    view full answer...
  • Upgrading 4-Way of Trailer to 7-Way to Wire Battery for Powering Trailer Interior/Exterior Lights
    For what you are looking for the standard solution that is tried and true is to install a vehicle battery in the trailer to power the lighting of your trailer. What you'll want to do for the trailer wiring is install the junction box 7-way kit # e99011 this is specifically designed for upgrading a trailer like yours from a 4-way to a 7-way. If you check out the picture I attached you'll see what the junction box does basically. The ring terminals on the bottom side of the posts are from...
    view full answer...
  • How To Wire Trickle Charge For Battery On A Camper Trailer
    To begin, you would need to install a 7-Way connector on the trailer. Since you will need several things including connectors, I recommend going with the Trailer Wiring 7-Way Upgrade Kit, Item # e99011, to make your project easier. It has a 7-Way connector, junction box, wire loom, and the hardware you need. Your trailer wire colors may be different so you have to wire in the new connector function to function, not color to color. To determine the functions of the wires, touch each...
    view full answer...
  • Recommended Junction Box Installation For LED Lighting And Break Away Kit
    I'm happy to help. You can use the Trailer Wiring 7-Way Upgrade Kit # e99011 to connect your trailer lighting. You can use the attached diagram to help you with color and function on the trailer side. I recommend using the 12 Gauge Black Primary Wire - per foot # 12-1-1. You can use ring terminals # DW05705-1 and butt connectors like # DW05745-10. You can use 16 gauge wire like # 16-4B-1 along with ring terminals # DW05737-1 and butt connectors # DW05744-5. Your side markers should...
    view full answer...
  • Parts Needed to Totally Rewire Trailer
    The Trailer Wiring 7-Way Upgrade Kit # e99011 is a good place to start. It gives you a new 7-way and wiring to a junction box where you can then wire all of the circuits to. Additional hardware that you may need is 3/16 Inch Ring Terminals, # 44-5310A, 1/4 Inch Ring Terminals, # DW05702-1, 12-10 Gauge Butt Connectors, # 05732-2, 16-14 Gauge Butt Connectors, # 05731-5, and electrical tape. And finally 10 gauge wire like part # 10-1-1 which is sold by the foot and 12 gauge wire # 12-1-1....
    view full answer...
  • How to Wire a Car Dolly for Electric Brakes
    If you will be adding electric drum brakes to your car dolly then you will need to install a 7-way trailer connector. For this, I recommend using the Trailer Wiring 7-Way Upgrade Kit part # e99011. I have attached a photo which displays how the wires will need to be ran on the trailer connector. In addition to the new trailer wiring harness you will also need braking assemblies, hubs/drums, a breakaway kit, and a brake controller. If you would like for me to recommend any of these parts...
    view full answer...
  • How to Tow a 2017 Kia Rio Behind an RV
    From my research your 2017 Kia Rio cannot be flat towed with all four wheels on the ground whether it has a 6-speed manual or 6-speed automatic transmisison. It must be towed on a tow dolly or a trailer. We offer tow dollies from Roadmaster that you can use. Parts # RM-2000-1 and # RM-2050-1 both can be used with your Rio. The main differences between the them are the weight capacity and that # RM-2000-1 has self-steering wheels. In order to power the brakes on either dolly you need...
    view full answer...
  • How Do I Change From Surge Hydraulic Brakes To Standard Electric Brakes?
    Switching from a hydraulic braking system to electric on a trailer is actually a lot less complicated than the other way around. You basically just need to lock out your surge brake actuator, swap out your brakes and hubs, and then add some wiring and a breakaway kit on the trailer side. I can actually let you know what you will need right now. I also recommend that you change your hubs and drum assemblies, because there are some hydraulic brake specific hubs which don't work with brake...
    view full answer...
  • Wiring Diagram for Installing etrailer Junction Box Upgrade to Utility Wiring Colors
    The only version of the etrailer wiring 7-way upgrade kit part # e99011 that we offer is this one that has the RV wiring colors. The best solution I can provide to help with that is a wiring diagram that has both color setups for you to compare and use when installing this.
    view full answer...
  • Troubleshooting P3 Brake Controller Not Connected Error on a 5 Prong Boat Trailer
    Don't worry, I can help. The reason your brake controller is reading "no trailer connected" is because the 5- to 7-way adapter you are using cannot read electric brakes. There is no 12V power or brake wire signal on a typical trailer end 5-way. Your best bet is to add a 7-way connector to the trailer like # e99011. This kit includes a 7-way, a junction box, and hardware. To complete the connection you will want to run 10 gauge wire like # 10-1-1 from the junction box to the brake...
    view full answer...
  • Replacing a Trailers 6-Way Connector with a 7-Way Connector
    The easist, and most sure way to know which wire is which function is to provide power to them, one by one, and see what happens. Wiring by function is unreliable because even though there is a traditional wire color code it isn't standardized by any means. Once you have found the functions of each wire you wan the pins on the new 7-way to be in the following pattern: 1 O'clock - Tail and running lights 3 O'clock - Left turn and right brake lights 5 O'clock - Ground 7 O'clock...
    view full answer...
  • Parts Needed to Rewire Trailer with 7-Way and New Wiring
    We offer handy junction box kits like # e99011 that let you install a new 7-way plug and make the connections for each circuit on the trailer. You will need ring terminals like # 44-5310A to make the connections in the junction box; use butt connectors like # DW05745-10 to splice in any new brake wiring like part # 10-2-1. This is double bonded 10 gauge wire that you can use for power and ground for the brake assemblies. Or if you planned on grounding the assemblies to the trailer frame...
    view full answer...
  • Parts Needed to Add Wiring for Trailer Lights and Brakes
    I recommend using the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector # e99011 to start off. This gives you a 7-Way connector and a clean and organized way to connect all of your wiring. Then for the wiring for your lights I recommend using the Wishbone Style Wiring Harness # A25W2GWB. This is 25' long which will give you enough for the length of your 16' trailer plus some extra wiring to make sure you have enough to connect all of your lights. You will...
    view full answer...
  • What Size are the Wire Studs in the Junction Box Included with Trailer Wiring 7-Way Upgrade Kit
    I went out to the warehouse to measure the studs on the junction box that comes with Trailer Wiring 7-Way Upgrade Kit # e99011. The studs are 3/16 inch. The kit does also include the appropriate size nuts as well as 3/16 and 1/4 ring terminals. I have linked a video showing an example installation for you.
    view full answer...
  • Can a 6-Pole Trailer Connector Activate a Reverse Light Circuit
    I do have an option for you but there would be no way to activate reverse lights with a 6-pole trailer connector. Instead, I recommend adding a new 7-way harness using the Trailer Wiring 7-Way Upgrade Kit part # e99011. If you do not want to re-wire the trailer then you could just simply run the reverse light wire with part # 12-2-1 and then add a 7-way connector with part # 54-77-003.
    view full answer...
  • Replacing a 7-Blade to 6-Square Trailer Adapter on a Pop Up Trailer
    What you have is an adapter that goes from a 7-way blade connector to a 6-way square connector. A few pop up trailer manufacturers used it but unfortunately replacements can be hard to find. In my opinion you would be better off cutting the 6-way off of the trailer and just hardwiring in a 7-way connector and not deal with the adatper. The easiest and cleanest way to wire in the new 7-way is with a junction box. We have part # e99011 that includes everything you need. I've also linked...
    view full answer...
  • How to Charge a Trailer Battery Using a 4-Way Trailer Connector
    The best way to maintenance charge the 12 volt auxiliary battery on your trailer would be to upgrade to a 7-way trailer connector. For this, I recommend using the Trailer Wiring 7-Way Upgrade Kit part # e99011. The 12 volt hot lead (black wire) that feeds into the trailer connector will need to connected to the positive post on the battery and will work to provide a maintenance charge. However, if you need to provide an actual charge then you will need to use a battery charger instead like...
    view full answer...
  • Troubleshooting Trailer Brake Wiring on Coupler Solenoid For Backing Up
    It is not wired correctly. The wires coming out your coupler are for the reverse lockout solenoid. The wire connected to ground is correct, but the wire connected to brakes at your junction box # e99011 is not correct. That pin is for electric trailer brakes and not a hydraulic surge brake coupler. You will want to connect that coupler wire to the reverse light circuit instead. This is designed to give power to that solenoid when you shift into reverse allowing that solenoid like #...
    view full answer...
  • Does Trailer Wiring 7-Way Upgrade Kit # e99011 Come with Ring Terminals
    Actually the Trailer Wiring 7-Way Upgrade Kit # e99011 that you referenced comes with the needed ring terminals so you would not need to provide any. The two sizes though are 3/8 and 3/16.
    view full answer...
  • How To Replace a 4-Way Trailer Connector with a 7-Way Trailer Connector
    The best option we have for you to upgrade the 4-way trailer connector on your trailer to a 7-way trailer connector is with the Trailer Wiring 7-Way Upgrade Kit part # e99011. Once you have this all you need to do is run the wires from the trailer lights to the junction box and then from the junction box to the trailer connector. Inside the junction box, the terminals are labeled by both wire color and function. However, when running the wires from this trailer connector to the junction...
    view full answer...
  • Easiest Way to Rewire 7-Way Wiring of 2004 American Pace Utility Trailer
    The best option for rewiring a trailer is the 7-way junction box kit part # e99011. You'll mount the box on the frame rail (or wherever works best) and then run the wires for all of the individual circuits to it and you'd be set.
    view full answer...
  • Which Axle if only one Should Have Trailer Brakes on Tandem Axle Trailer
    We recommend putting the brakes on the axle that will have more of the cargo's weight on it. For a utility trailer that's typically the front axle. Typically the only time you see the brake axle as the rear axle is if it's a boat trailer since the weight of the engine is behind the axles.
    view full answer...
  • 7-Way Wiring/Junction Box Kit Recommendation for Flat Bed Trailer
    The Trailer Wiring 7-Way Upgrade Kit # e99011 that you referenced will cover all of the wiring from the trailer 7-way connector to a junction box for you to install on the trailer frame. Beyond that it would be a matter of running wires from the junction box to each of the functions you have on the trailer such as lights and brakes. We have 10 gauge wire like part # 10-1-1 (sold by the foot) for wiring up the brakes and then 12 gauge like part # 12-1-1 for the lights as well. I attached...
    view full answer...

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality 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 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:

Edited by:
Lindsey S
Expert Research:
Jameson C
Installed by:
Kathleen M
Updated by:
Sarah W
Written by:
Kristina F

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.