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Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long

Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long

Item # W787270
Our Price: $28.08
Trailer Wiring
Shipping Weight: 1.22 lbs
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This 4-wire flat, trailer-end connector includes a 10' long, jacketed cable with stripped, color-coded wires for easy installation. Great Prices for the best trailer wiring from Wesbar. Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long part number W787270 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (41)
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  • Videos (2)
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Wesbar Trailer Wiring - W787270

  • Trailer Connectors
  • Trailer End Connector
  • 4 Flat
  • Plug and Lead
  • 6 - 10 Feet Long
  • Wesbar

This 4-wire flat, trailer-end connector includes a 10' long, jacketed cable with stripped, color-coded wires for easy installation.


  • 4-Way flat connector provides a male plug for your trailer
  • Jacketed cable protects wires against the elements
  • Color-coded, stripped wires ensure simple installation


  • Wire length: 10'
  • 14 Gauge wires
  • Wire configuration:
    • Yellow: left turn and stop lights
    • Green: right turn and stop lights
    • Brown: tail, license, side marker and clearance lights
    • White: ground wire
  • 1-Year limited warranty

787270 Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long

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Video of Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long

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

Video Transcript for Wesbar 4-Pole Flat Connector with Jacketed Cable Review

Hey, everybody Adam here with etrailer. Today, we're gonna be taking a look at the west bar jacketed four pole trailer connection. So the one that we have right here is about 14 foot in length, but we're also gonna have a 10 foot, an eight foot and a four foot. It's all gonna have a 14 gauge wire on the inside. And the diameter of this jacket is gonna be about 0.4 of an inch. So now all of these trailer wearings come with jackets.

This is just gonna look a little bit cleaner, but it does have a nice little shape to it. So a little bit bigger down here. So whenever you are pulling it off, one, it gives you plenty of room to be able to wrap around it. And since it's a little bit bigger here, it's gonna be kind of easier to pull it out. If you want the easiest four-pole that is the easiest to disconnect from the other side, the Hopkins has an easy pole, which just has a little circle right here.

And that's probably gonna be the only one that's a little bit easier, but it does not come with this jacket. I really like the jacket just because it's gonna protect it and looks a lot easier. And since we're using a junction box, it makes for a really, really easy and clean connection. So if you follow us down, we basically go on the inside of this tube, all the way to our junction box which is right up here by the trailer. So we're gonna have four different wires that come in here cause it's a four pole.

So if you follow me, we'll so you exactly what it looks like in the junction box, just because I like the junction boxes, they're a little bit cleaner. And if you're adding six accessories and stuff like that, it'll make a nice clean spot to be able to know exactly where everything's going. So we have the jacketed side of our trailer connection going through our junction box and we're gonna have four different wires. So we're gonna have our yellow, which is gonna be our left turn signal and our brake lights. We're gonna have our green is gonna be right.

And our brake lights, we're gonna have white, which is gonna be our ground. And then we're gonna have our brown as well, which is just gonna be your running lights, your taillights and everything else like that, including your license plate lights. So all of these kind of go in here and if you do want to grab a junction box, we do have these here at etrailer. These are just pretty much the cleanest way to wire up your trailer. The only thing that I would add to this is just a little dust cover just because it's gonna be exposed. So if you don't have a great place to put it, I mean, some people just kind of hide it underneath here, but it's not gonna be protected. So there is a dust cover specifically for this and I do recommend that you get. So now that everything's good, it is really smart to check and make sure it works before you button everything up. So we just have a little test box here. This is gonna mimic hooking up to our vehicle. So now as you can see, we do have some lights and stuff turning on. So we have everything turned on, but we're gonna test the functions. So let's start with the right turn signal. Then we're gonna go to the left. And then we want to make sure that our brake lights are working, which everything is good. So once you go through all those checks, you can button everything up and we're pretty much done with the install. If you already have your trailer and it's not really that clean when it comes to wiring and you don't really plan on putting a junction box in, all you're really gonna need to do is just grab some 14 gauge wire and some heat shrink butt connectors. And I would get some loom and we also have some loom hangers. So you're gonna run all this all the way back on the underside of your trailer, if you get on the inside of the tube, great. But a tube doesn't really work that well because it's a lot of tube, it's a lot of wire to fish through there. So you have everything that you need to hook up your trailer regardless of what kind of setup you plan on going for. Whether you go with the junction box or not, we're gonna have to run these wires back to our lights. And as you can see, we have a nice clean look. We got some loom, we got some holders. And then of course we got some lights. If you guys need lights, we've got those too, but the cleaner, the better when it comes to my trailer. So if you really want to make it nice and clean, we have everything you need to do that. All in all, I'm a fan of this one just because it has the thick little casing on the outside. And it just looks a little bit better, it matches my trailer. But if you are looking for one that's gonna be a little bit easier to pull apart, the Hopkins has one that just has a little circle on the inside, which we went over before. That one's gonna be a little bit easier, but this is pretty much checking all the boxes when it comes to trailer connections, and that is gonna do it for our look at the west bar jacketed four pole trailer connection..

Customer Satisfaction Score:

Customer Reviews

Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long - W787270

Average Customer Rating:  4.8 out of 5 stars   (41 Customer Reviews)

This 4-wire flat, trailer-end connector includes a 10' long, jacketed cable with stripped, color-coded wires for easy installation.


Excellent product, have used for years with no problems.


Another great product from Etrailer. Perfect fit and has held up like new


Actually, I’m commenting on the service, I haven’t had time to attach the cable. Service was awesome. MUCH faster than I expected.


Purchased this part to rewire my utility trailer. I like the fact that it is jacketed and looks as though it will last a long time. I used all weather proof boxes, cable and connectors for the rewire. I would not hesitate purchasing this part again!!

Gregory M.


Looks like new, works like new! In a word AWESOME!!


I purchased this for a utility trailer as well as a boat trailer. It works well for both applications. I mostly like the lack of individual wires and wire loom. I think it makes both trailers look like a factory/professional installation.



I am still happy with this purchase and would recommend it to future buyers.


Great Product! It was the best replacement trailer plug with wire that I could find.

It is much heavier duty in nature than others I have looked at.



The Wesbar wiring harness has held up real well, considering how much I use the trailer. It should last many years.


Very good quality, nice heavy-duty, jacketed plug for a durable installation.



excellent quality


Purchased this setup to have a sealed cable and plug end. After minimal use, the cable insulating rubber jacket pulled free from the plug end exposing the wiring. This completely negated the whole purpose of this setup.
I never pulled on the cable to disconnect the plug.

Very disappointed.


The Wesbar harness worked great on my utility Trailer rebuild. The pre-assembled cord is a huge upgrade from the electrical tape wrapped wiring I previously was using.


Very high grade plug, would recommend to anyone that has a trailer that they hook up to frequently (as in out case 4 to 5 times a week). Oversized end makes it easy to pull or push at tow vehicle. Great connector!


I've dealt with etrailer over the last few years. Their staff was always helpful and they truly have everything related to trailering. Shipment has always been quick and they had handy parts not available around home. I wouldn't hesitate to buy from them again. Carl B.


Just what I was looking for at the right price to clean up my messy trailer wire harness. No more cut / scraped wires or issues with trouble shooting lights that are out. Well made weather proof wire harness.


Construction of the product looked awesome however I could never get two of the conductors to work. I am guessing the 2 wires were broken in the assembly but could not locate where. The construction looked great, the actual function didn't work at all.


Great cable. Heavy duty and just what I wanted for my little trailer.
1000% better than standard cheap trailer harnesses. Would buy again in a heartbeat!


Redoing a snowmobile trailer and I wanted the have a jacketed 4 wire for longevity since I am replacing all lights and wire.


Used on a trailer tongue replacement. Worked well, still no problems one year later. Etrailer is a company I will use for ant trailer/towing needs.


Excellent product works great I have bought many items for trailers I rebuild never had a problem with etrailer products will continue to buy from them.


Outstanding quality! A+++ #14 AWG far superior connector than the one I replaced. Insulation will withstand all types of weather.


Works very well. Much better than the junk most trailer manufacturers put on their trailers. Will use again for sure when necessary.


Easy installation. Rugged construction. Holding up very well.


This should be able to replace the old cord that fell out of the truck, and drug 200 miles down the highway.


Harness worked out great. Item met all my expectations. Would recommend etrailer to my friends.


Heavy duty wire sheathing that is holding up well. No issues thus far.


Good quality product at a fair price. Excellent customer service and follow-up to make sure order was delivered on time.


Heavy duty plug and cable. Highly recommend this over the cheaper flat cable version.

Show More Reviews

See what our Experts say about this Wesbar Trailer Wiring

  • Diameter of Shur-Plug on Wesbar 4-Pole Flat Connector
    Yes, the diameter of the Shur-Plug on the end of the Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 10' Long # W787270 is 0.180". This would be the case for any 4-way wiring connection since they are universal.
    view full answer...
  • Wire Gauge of Wesbar 4-Pole Flat Connector With Jacketed Cable
    I verified with Wesbar that the 4-Pole Flat Connectors # W787274 for the 14 foot, # W787270 for the 10 foot, and # W787268 for the 8 foot are all 14 gauge wires.
    view full answer...
  • Replacement Trailer Wiring
    if there wasn't much cut off you can use this 4 foot long 4 pole pigtail # W787264 or if you need a little bit more you can get the 10 footer # W787270. If you have a 7 pole you can get this 8 foot long 7 pole wiring # H20046. Whenever wires get cut, I am weary about patching it up as it could cause other problems in the future. I would much rather replace the whole harness.
    view full answer...
  • Connecting a 3rd Brake Light on an In-Bed Camper to a 2022 Ford F-150 Lightning
    I do have an option for you that will allow you to not have to splice into your taillights, but we do not have a product that is similar to the Leer 300200 harness. The Tekonsha T-One Vehicle Wiring Harness # 118384 will connect in line of the factory 7-way already on your F-150. This gives you a 4-way flat trailer connector. To that you can attach the Wesbar 4-Pole Flat Connector w/ Jacketed Cable # W787270. This cable gives you a place to disconnect your wiring if you need to remove...
    view full answer...
    Image 1 for Image 2 for
  • Connecting A 3rd Brake Light With The Pacer 3RD Brake Light Module On a 2018 Chevrolet Silverado
    For your 2018 Chevrolet Silverado I have another way of connecting the 3rd Brake Light Logic Module # PP20-702 so that you do not have to splice any wires in your tail lights. The Tekonsha T-One Vehicle Wiring Harness # 118384 will connect in line of the factory 7-way already on your Silverado. This gives you a 4-way flat trailer connector. To that you can attach a Wesbar 4-Pole Flat Connector w/ Jacketed Cable # W787270. This cable is protected with its heavy duty jacket and give you...
    view full answer...
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  • Replacing Trailer End 4-Pole Connector That Has 8 Wires
    For starters, a quick-fix type connector shown in your photo is typically a good choice for an emergency repair, but I wouldn't use it as a permanent fix. It looks like your trailer wiring has 3 separate grounds and 3 separate running lamp circuits for some reason. This is kind of a strange setup, but if everything worked fine beforehand, there really wouldn't be any need to change that at this point. Your suspicion is correct, I don't believe all those wires will fit in there either. For...
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  • Can Roadmaster RM-910030-6 6-Pin Be Used to Replace 4-Pole Trailer Connector
    You could certainly do that if you wish, but if durability is what you're primarily concerned with, I'd use the # PK11609 die-cast socket along with the # RM-910030-8 plug, versus the plastic 6 pin plug provided with the # RM-910030-6 plug you'd looked at. The metal socket would withstand abuse better than the plastic socket. One thing to keep in mind, if you wire the vehicle and trailer this way, you'll have an issue if you ever try to to that trailer with another vehicle. You might...
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Do you have a question about this Trailer Wiring?

Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Cole B
Installed by:
Cole B
Employee Adam E
Installed by:
Adam E
Employee Chris R
Video by:
Chris R
Employee Jared G
Test Fit:
Jared G

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