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

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

Item # W787264
Our Price: $16.70
Trailer Wiring
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This 4-wire flat, trailer-end connector includes a 4' 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 - 4' Long part number W787264 can be ordered online at or call 1-800-940-8924 for expert service.
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Wesbar Trailer Wiring - W787264

  • Trailer Connectors
  • Trailer End Connector
  • 4 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • Wesbar

This 4-wire flat, trailer-end connector includes a 4' 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: 4'
  • Wire size: all four are 16 gauge
  • 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

787264 Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 4' Long

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

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Customer Reviews

Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 4' Long - W787264

Average Customer Rating:  4.9 out of 5 stars   (141 Customer Reviews)

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


Heavy duty plug that has a good snug fit and I like the jacketed cord that provides strength and extra protection.


I have been very pleased with etrailer orders recently. Everything shows up when expected and products are as expected. Attached are a couple before and after pictures of my recent project to add lights to a cargo rack per my wife's request. Thanks for the professionalism of all at trailer


Delivery was quick and electeical was just what I was looking for.
Was able to mount bracket to hitch and running the wiring was easy with it all color coded.
The single sheathed trailer plug was also what I was looking for and priced below anywhere else.
Was very industrial and was almost an exact match to replace the existing one on
my triton trailer.


This is a great replacement trailer light 4-prong connector. The wires are wrapped in an insulation cover and the connection itself is rugged and well-made. This is the one to buy.


Exactly as advertised fixed old connector that was worn out


Just what I needed. Just went to etrailer looked it up had it in a couple of days. No stress. etrailer is the best. My go to place for anything for my trailers!



Good. Just what I needed..


The spring loaded connector cover on my 2014 Ram pickup was pressing so hard on my 4 prong plugs that it was breaking the conductors inside the insulation, right at the entry to the connector. I switched to using the 7 prong socket and bought a 7 - to - 4 - pole adaptor. As added insurance I added these heavy duty connectors with heavy gauge wire pigtails. Great quality on these, and a nice 4 foot pigtail clad in heavy rubber to protect from sun and other damage. Bought 2, and will be buying 4 more from etrailer for my other trailers. Fast ship from etrailer, too.

Norm C.


Great quality and heavy duty wire. Ive bought 6 of these and Im replacing all of my trailer plugs as time permits.


This four pin harness is heavy duty and the quality is very good. I needed to upgrade the 47 year old harness on my trailer which had multiple splices and the extra length of this product was enough to get rid of the old wiring. Looks really nice and professional. And I still can not get over the customer service and promptness when dealing with guys are great, keep up the good work!!! Don't forget to order the mounting clamps to complete the installation.

Edmund G.


Been using this harness now for about a year and it has held up well.....still flexible and pins are sturdy. It is a pleasure to use compared to the old cheepo wiring that came with the trailer :


I bought this to replace the one that came on my boat trailer. This is a good quality cable and molded connector. I'm sure that if I am careful with it , that it will last for as long as i need it. I have bought a number of items from etrailer and have yet to be disappointed. Good stuff, good service.

Jimmy M.


Looks like it did when I installed it, good stuff. Much better than what came on it from the factory. Well pleased.


Thanks guys for offering the best answer to repairing the front end of trailer wire harness with quality not just the flimsy harnesses on the open market. just wish I could find you closer.


This product is perfect for use on utility/other trailers as it is far superior and much more durable and rugged than "plain" flat four-wire, so it will hold up much better to repeated use and weather.

Paul B.


Installed the quality product in prep for future car tow. Insulation on cable is far superior to flat wire, which helps protect the wires in harsh environments, be it under hood for towing car as dingy, or perfectly suitable for utilityother trailers using 4-wire connections.


See previous review.


Nice heavy duty cable with good connect or


The wire harness is holding up just fine after a little over a year! Definitely recommend!


I really cannot grade the product as I never got to use it. The trailer where the wiring harness was needed ended up being in worse condition than I thought and got recycled. As far as customer service, you were great.


Replacement plug is working great. The sheath cover over the actual wires should make it last along time. Easy install with heat shrink connectors I had on hand. great product at a great price. Thank you James.


Trailer connector was installed with waterproof splices. So fay every time I plug it in it works, its when I unplug it that it stops works. totally baffled by this. Will have to leave it plugged in every time I use it.


Wesbar plugs are great quality. They snap together and stay connected. The pins are molded into the plug, very durable. The wire cover is heavy duty.I will definitely buy Wesbar plug harnesses again. Mike at etrailer provides great customer service. He helped me with a fender order that had the wrong picture on the web site. He reshipped the correct fender the day we spoke on the phone and rushed it to me . Thanks again Mike for your help and great customer service. That is what keeps me coming back again & again.


This is a great product that I wish knew existed years ago. I have wired many trailers and the connection will last for many years due to the fact that the connector is molded into the actual harness instead of having 4-5 loose wires that seems to take a beating and break.


Perfect in every respect. Integrated into a Honda Civic wiring harness for Break llight, LT, RT, and running lights.


I bought two of these previously and liked them so much that I bought 3 more. 16 gauge wire is way heavier than most trailer plugs/harnesses come with, plus the plugs are heavier duty and the cable is clad in heavy rubber for protection. I would buy more but I only have 5 trailers at the moment.


Molded plug & shielded cable makes for a clean & protected installation.

Ray S.


Great, Keeping it as a spare.


Item was as described. Heavy duty shielded cable and wiring. Very happy with purchase and communication.

Roy G.


Trailer wiring cable is holding well. I would recommend this product to others


Quality of trailer wire connecter was beyond expectancy. I'll be buying all my boat trailer items from you! Note-my boat-buddy is working fine, thanks for helping me with my orders, and your friendly personality Emily. The super fast delivery is
greatly appreciated too!

Ron C 7/11/16 (my birthday)


High-quality piece. I chose this connector over the cheaper alternatives because it looked sturdy and the wires are covered. Due to the condition of the previous connector the covered wires for my boat trailer were the way to go. I was able to install this with no problems and it works great! Also, the length was a big upside and I can make left turns with the trailer without worrying that the connector is going to pull out!

Show More Reviews

See what our Experts say about this Wesbar Trailer Wiring

  • How To Make 15' 4-way Trailer Wiring Harness With 14 Gauge Wiring
    We have the parts you are looking for, but none of our 4-way connector harnesses use 14 gauge wiring as 4-way connectors typically use 16 gauge wire. With that said you can make your own using the Deka Jacketed 4-Wire - 14 Gauge # DW04923-1 which is sold by the foot and 4-way connector # HM48192. To make the connections to the lights on the trailer I recommend using heat shrink butt connectors # DW05744-5. I included a few videos of the products mentioned for you to take a look at.
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  • 4-Way Recommendation for Roadmaster Magnetic Tow Lights part # RM-2120 for Connect to Tow Vehicle
    The Roadmaster Magnetic Tow Lights part # RM-2120 that you referenced will work for you, but you will need to also purchase and wire a 4-way like part # W787264 to the blunt cut wires of the # RM-2120. The 4-way you described on the # RM-2120 plugs in to the 4-way of the light assemblies, and then the wire of that 4-way is left without a connector so that you can wire it up to match the connector of your tow vehicle. In your case you would just need to wire up the # W787264 to it and you...
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  • Solution for Connecting Vehicle With 4-Way Flat to Trailer With 4-Way Round
    There are adapters that go from a 4-round on a vehicle to a 4-flat on a trailer but not vice-versa, but we do have a simple solution for you. All you need to do is cut off your trailer's 4-round and wire in a trailer-side 4-flat, the Wesbar 4-Pole Flat Connector - 4' Long # W787264 or 8' Long # W787268. To install either you just need the Butt Connectors # 05731-5. I've added a link to an install video for you to check out as well.
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  • Recommendations for Converting a Pop Up Trailer 6-Way to a 4-Way
    If your trailer is a Jayco you could pretty easily use a 4-way to 6-way round adapter # A10-6034VP and the 6-way round to 6-way square adapter # HM47415. If the brand of your trailer is different then your best bet would be to cut off the 6-way of the trailer and wire up a 4-way to the circuits. For a 4-way you could use a Wesbar 4-Pole Connector # W787264. You will need to determine what the wiring of your trailer is and then wire those circuits to the 4-way accordingly. You could use...
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  • Troubleshooting Trailer Wiring Harness Installation in 2014 Dodge Avenger R/T
    Since you have had your wiring harness installation tested with a circuit tester and have found it to carry the appropriate lighting signals from your 2014 Avenger, the issue is almost certainly within the trailer's wiring. Inspect the trailer connector for any signs of corrosion. The contacts do not have to appear rusty or deteriorated to have a corrosion issue; even slight greenish or whitish discoloration can indicate mild corrosion that can interfere with signal transmission. Clean...
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  • Which License Plate Bracket with Light for Cargo Carrier to be Used with Curt Auxiliary LED Lights
    In order to add a light to a cargo carrier I recommend using the Optronics LED Trailer License Plate Light w/ Bracket - 5 Diodes - Clear Lens # LPL55CB. The Curt Auxiliary LED Indicator Lights # C53201 does not provide an easy solution for powering the license plate light, however you will want to tap into the running light circuit either on the wire that runs to the plug or you can bypass the plug on the wiring and connect directly to the running light circuit on your vehicle's 4 way plug...
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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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    Image 1 for
  • How To Add 4-Way Trailer Connector On Trailer With 5 Wires
    I would be happy to help walk you through how to install a 4-way connector on your trailer. Since your trailer has two green wires going down the right side of the trailer, that tells me that one of the wires is powering your running lights. The easiest way to test which of the wires is for the running lights, connect the white ground wire and one of the green wires to a 12v battery and see what lights come on. To install a 4-way trailer connector like the # W787264 you will need to connect...
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  • Vehicle Side 4-Way Trailer Connector that is 4 Feet Long
    The Hopkins Endurance Easy-Pull 4-Pole Connector # HM48044 is a 4 foot long vehicle side 4-way trailer connector. It isn't exactly like the Wesbar # W787264 but it is the opposite end and the same length so it will work for you.
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  • What Gauge Wire does 4-Way Trailer Wiring Use
    Typically 4-way wiring consists of 18 and 16 gauge wires. For a 4-way that has all 16 gauge wire you would want the Wesbar 4-Pole Flat Connector # W787264. The part # HM38138 uses 18 gauge for all wires but the white that uses 16 gauge.
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  • 4-Way Recommendation Where all 4 Wires are 16 Gauge
    I spoke with my contact at Hopkins and they informed me that the Hopkins Endurance 4-Way Flat Trailer Connector # HM48110 that you referenced has 16 gauge for the white (ground) wire and 18 gauge for the rest. For a 4-way that has all 16 gauge wire you would want the Wesbar 4-Pole Flat Connector # W787264.
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  • Creating Adapter to Go From 7-Way Round to 4-Way Flat
    The 7-way round connector is odd as it typically means the vehicle has the stop lights and turn signals on separate circuits which is the opposite of what trailer wiring has so you'd need to come up with an adapter since there isn't one ready-made. If this is the case you can build an adapter using the part # RM-732 as a signal converter. You will need a round pin male connector, # PK11702 and then the part # W787264 for a 4-way. Basically you will be splicing the converter between these...
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  • Can Roadmaster RM-910030-6 6-Pin Be Used to Replace 4-Pole Trailer Connector
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  • What Size Wire Gauge Do 4 Pole Connectors Use
    The Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector # HM38134 you referenced has 18 gauge wires for the brown (taillight), green (right turn and brake), and yellow (left turn and brake) wires. The white (ground) is a 16 gauge wire. Typically 18 or 16 gauge wire is sufficient to run trailer lights, especially when you use LEDs since they draw much less power than incandescent bulbs. For similar trailer connector that has all 16 gauge wire the Wesbar 4-Pole Flat Connector w/...
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  • What Gauge Wire Does 4-Way W787264 Use
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  • Is There a Universal 4-Flat Trailer Wiring Harness That Connects to Tail Lights
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  • Availability of 4-Flat Trailer End Connector
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  • How to Wire Up a Trailer with Separate Taillights to a 4-Way
    You are going to need two thing, a taillight converter like part # 118158 and a trailer side 4-way like part # W787264. You will need to cut the connector off of the trailer and then wire the # 118158 to the trailer wiring like the diagram I attached to the right shows and then wire the # W787264 to the wires on the input side of the converter.
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    Image 1 for
  • Can Standard Trailer 4-Way Replace One With 7 Wires
    A 4-way with seven wires has two wires for each side of the taillight circuit, and you can use a standard 4-way, like you mentioned, the Wesbar 4-Pole Flat Connector # W787264. I have added a link below to a video review for you to take a look at, as well as a couple help articles on trailer wiring you may want to check out.
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  • Recommended Replacement 4-Way Connector For 1960 Trailer
    We do offer flat 4-way trailer connectors. I recommend the Wesbar 4-Pole Flat Connector w/ Jacketed Cable, part # W787264. You would need to cut the connector off of your trailer and test the wires on the trailer for function using a 12-volt power source and a circuit tester like part # PTW2993. I recommend using a junction box like part # 38656, to protect the wiring. For ring terminals I recommend part # DW05702-1 for 14-16 gauge wires and part # 44-5310A for 10-12 gauge wires. I...
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  • How To Add Tail Lights To a Bike Rack
    In order to create a wiring harness for the two Thinline LED Trailer Tail Lights part # STL59RB I recommend using the Wesbar 4-Pole Flat Connector part # W787264 along with the Deka Heat Shrink Butt Connectors part # DW05744-5. The white wire on each light as well as the trailer connector will need to be run to a bare metal surface. The black wire for each light can be combined and run to the brown wire on the trailer connector. The red wire for each light can then be run to the yellow...
    view full answer...

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Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Laura H
Updated by:
Laura H
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

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