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Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 14' Long

Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 14' Long

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This 4-wire flat, trailer-end connector includes an 14' long, jacketed cable with stripped, color-coded, 14-gauge wires for easy installation. Great Prices for the best trailer wiring from Wesbar. Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 14' Long part number W787274 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (60)
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Wesbar Trailer Wiring

  • Trailer Connectors
  • Trailer End Connector
  • 4 Flat
  • Plug and Lead
  • 11 - 20 Feet Long
  • Wesbar

This 4-wire flat, trailer-end connector includes an 14' long, jacketed cable with stripped, color-coded, 14-gauge 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: 14'
  • Jacketed cable diameter: 0.40"
  • Wire gauge: 14
  • 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

787274 Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 14' Long

Item # W787274

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Video of Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 14' 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 - 14' Long - W787274

Average Customer Rating:  4.9 out of 5 stars   (60 Customer Reviews)

This 4-wire flat, trailer-end connector includes an 14' long, jacketed cable with stripped, color-coded, 14-gauge wires for easy installation.


We installed this cord on a tilt bed trailer that we use to transport scissor lifts. We have multiple trucks that pull this trailer and the receptacle on these trucks are in different locations. This required using a 4 flat extension on many of them and as you would expect, the extensions come up missing and of course no one knows what happened to them. We tried every trailer supply store in the Phoenix area and no one carries a cord like this. Because this one is 14' long, we can cut off what we don't need and wire it into the J-box on the trailer and make it long enough that we don't need an extension. Great product.

Geiger E.


Works great, no change in my opinion.


Just received today so haven't installed. Looks heavy duty and the quality is evident when the package was opened.


Exactly what I wanted to replace a cable that has suffered from being dragged on the street while I drive (I am new to Trailer Life). The website is very nicely organized and loads up quickly. Order tracking was also convenient. Now I know why everyone tells me that Etrailer is the best source for trailer parts.





We installed this on a small trailer. It didn't need to be this long, but we just cut off what we didn't need. Works great.


Heavy duty cable. Perfect length to go from factory 4-pole flat connector for after market lighting on head ache rack on Ram 2500 SWB.

David S.


Good as new. Working perfectly.


Nice heavy cable and end. Better than the unjacketed style.


As with anything, you get what you pay for. I have been constantly repairing/trouble shooting a lesser quality trailer wiring kit. This is a far superior quality product. This 14 gauge wire will save you time and grief that the wimpy 22 gauge kits commonly sold will do. In addition, the plug end fully encloses the wiring to prevent wire fatigue and breaking at the connector. Hooked this up, trailer lights working again! No disappointments here. Thanks e trailer!


The Wesbar 4-Pole Flat connector w/Jacketed Cable has enough wire to reach the rear of most trailers so no wiring connectors are needed at the tongue of the trailer where most wiring problems occur.


etrailer is by far the best place for trailer parts, the trailer cord with molded end and protective cover was very high quality and the price was very reasonable.

Pat T.


Great, it will probably out last the trailer


I am very pleased with the wiring I received. It has a nice thick outer casing which should prove to be quite protective, particularly from the elements. I did add an additional shell I found on[line] which is a coated metal conduit. The etrailer wiring fit into it perfectly (with a little boost from a squirt of silicone). It's not that the etrailer wiring was bad - anything but - it's that we have particularly determined mice (we live in the country) who have eaten through wire coatings in the past, even thick ones. Together - unstoppable. This is the third time I have had to rewire that trailer (because of the mice) and hopefully the last.


Just installed this cable on my trailer. The jacket is very thick and looks as if it will last s long time. No more using a whole of electrical take to protect the wires. Plug seems to be very tough too. Delivery was quick only 3 days with standard shipping. I will buy again when I rewire my other trailers.


Thicker than I expected. Nice surprise.




After years of using standard flat 4 wiring harnesses and breaking wires, I decided to look for a professional moulded plug and jacketed wire set. That is when I came across this product at etrailer. The product was packed well and arrived quickly. I will be replacing my current trailer wiring with this item on my trailer and getting a second product for a friend's trailer in the spring.


This trailer plug-in kit is great. I've had it a year and it has stayed flexible even when -20 degrees. Highly recommended for new or replacement of trailer wiring.


I used this cable to rewire my trailer. The cord is molded at the connector and was excellent quality. I used this with a dust cover and junction box. The rewiring job came out fantastic.


Excellent product! Solves the issue of water intrusion from the plug to the wiring harness. No more cleaning corrosion from the backside of the connector. Coupled with the Wesbar Dust Cover to keep the pins free of contamination, this is a reliable combination that will last years.


Products from E-Trailer are top quality and are exact fit.


When I received the trailer light cord it was more heavy duty than expected very good-looking product.
Also,customer service was excellent !
I needed help with tracking they help me promptly and found my package .


Fast shipping,excellent looking harness. I'll be installing it this weekend.

Michael H.


Great !!


Amazing. I replaced my troublesome original wiring with this. Heavy duty. Been perfect for a year now. I exoect it to last the lifetime of my trailer.


This item met my needs to a T. Wanted a 12 foot four pin product but could only find an 8 foot listed. Called the help desk and the lady on the phone told me the had a 14 foot product and the item number. Place the order and received the item in a very timely manner. If you need trailer parts this the place to go.


Product received as advertised in a timely manner. Jacketed cable and the available dust cover accessory are major points to this purchase.


The product is working great yet! I had wonderful service when I first ordered the wiring as well.


Excellent product and very effective in overcoming the wear and tear that trailer wiring is exposed to.

Show More Reviews

See what our Experts say about this Wesbar Trailer Wiring

  • Wire Gauge and Jacket Diameter for Wesbar 4-Pole Flat Connector w/ Jacketed Cable, # W787274
    I used a wire gauge and some digital dial calipers to get the measurements that you need for Wesbar 4-Pole Flat Connector w/ Jacketed Cable, # W787274. The copper wire gauge using the gauge measurer fell between 14 and 16 for all wires so 16 gauge is what I would call it. The diameter of the jacketed wire is 0.4 inches measured with the dial calipers.
    view full answer...
  • Availability of Protective Cover for Wesbar # W787274 Trailer End 4-Pole Connector
    We have exactly what you're looking for, part # W787301 which is compatible with the Wesbar # W787274 you mentioned.
    view full answer...
  • Wesbar Trailer Side 4-Way Recommendation with Short Wire Leads
    The Wesbar trailer end 4-way we offer that has the shortest amount of wire lead is the part # 002402 which has an 18 inch wire lead.
    view full answer...
    Image 1 for
  • Wesbar 4 Pole Flat Connector Damage Repair or Replace for Trailer
    I would recommend replacing the entire cable harness to the weather proof connection. Wesbar 4-Pole Flat Connector w/ Jacketed Cable # W787268 is an 8' cable but we do offer a 14' option # W787274 if you need the additional length. In my opinion it is never a good idea to try and replace a connection end. They are almost never weather tight and will sometimes come apart when in use.
    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...
  • How to Test to Determine Function Carried on Trailer Wiring
    Often trailers will use the commonly-accepted wire colors for specific functions, such as a blue wire for trailer brake power, but there is no guarantee that a wire's color correctly tells you what it does. The surest way to know what a trailer wire does is to directly apply 12V power to it and see what function on the trailer is activated. In typical 4-pole trailer wiring a yellow wire will carry left-side stop and turn light signals. You can use your vehicle's battery (or a well-charged...
    view full answer...
  • Recommendation for Higher Gauge Wiring to Use on Trailer
    I recommend taking a look at the Wesbar 4-Pole Flat Connector # W787274 for your trailer. This 4-Way flat, trailer-side connector includes 14 feet of jacketed, 14-gauge wires for easy installation. This thicker wire will definitely hold up better than the existing wiring on your trailer. If you just need jacketed wire and not the connector, you can use the Deka # DW04923-1. This 4-Wire, jacketed wiring uses 14-gauge wire and is sold by the foot, so you can order the exact length you are...
    view full answer...
  • Will Wesbar 4-Pole Trailer Connector be Long Enough for 10 Foot Trailer
    The best way to know if the 14 foot Wesbar 4-Pole Trailer Connector # W787274 is long enough for you is to measure. Hook your trailer to your truck and measure from the truck's trailer connector back to one tail light. You'll need some slack in the harness for it to work. You can always add wire if you need to, or for making the jumper connection, using # DW04923-1, which is sold by the foot.
    view full answer...
  • How to Get Trailer Wiring From One Side of Running Light Circuit to Other Side of Trailer
    Since the Wesbar 4-Pole Flat Connector w/ Jacketed Cable # W787274 is 14 feet long and you need 13 feet to get to the taillights on each side of the trailer you'd have enough wire for each color aside from the brown wire. You'd want to run it to one side of the vehicle and then use a jumper wire like part # 12-1-1 to get the circuit to the other side. The # 12-1-1 is sold by the foot.
    view full answer...
  • Heavy Gauge Trailer 4-Way Wiring, 16 Gauge
    The longest 4-way harness we offer that has all 16 gauge wire is the Wesbar Harness part # W787274 which is 14 feet long. For one that is 30 feet long that has a 16 gauge ground wire and 18 gauge signal wires you would want the part # W002230.
    view full answer...
  • Availability of 20 ft Long 4-Way Harness as Well as 2-Way Connector
    We do have a 20 foot long 4-way plug and lead with the Wesbar part # 002220. We do sell 2-pin connectors like with the HM47965 which his 12 inch inches long. Normally you cut the harness in half and wire it to either side of where needed. The amp rating of 4-way wiring is typically between 10 and 15 amps.
    view full answer...
  • 16 Gauge Wiring Options for the Hopkins Replacement Endurance 4-Way Trailer Connector
    While it is possible this may work, I did contact Hopkins who confirmed this Hopkins Endurance Quick-Fix Replacement 4-Way Flat Trailer Connector # HM48192 is designed for use with 16 or 18-gauge, not the 14-gauge of the Wesbar 4-Pole Flat Connector w/ Jacketed Cable # W787274. They did not recommend this approach of stripping wires to make it fit. The Hopkins Endurance Quick-Fix Replacement is not a great long term solution but with the appropriate length of Deka Wire - Jacketed 4-Wire...
    view full answer...
  • Available Vehicle and Trailer Wiring Connectors
    I cannot recommend custom-fit trailer wiring for your vehicles without knowing their year, make, model and version but I can help you with basic 4-pole type connectors for both the vehicle and trailer. I linked pages for both types of connectors. For a trailer side 4-pole you can wire in to your trailer we have items like # W787274 and # 54000-026. For a vehicle side 4-pole we have # 18252 and # C58345 which includes a bracket. For a bracket only use # 18144. I also linked a helpful article...
    view full answer...
  • Trailer Lights Not Working After Launching Boat Trailer Into Water
    It sounds to me like you may have shorted out a wire somewhere along on the trailer's wiring harness. To test this, I recommend using a circuit tester like part # PTW2993. Have a friend sit in the vehicle and apply the brakes and turn signals while you test the wires just before the taillights. If power is reaching the taillight but still not working, you will first want to ensure the connections at the back of the taillights are secure and corrosion free. If no problems are present, you...
    view full answer...
  • Replacement Trailer Side 4-Pole Connector for Boat Trailer
    We do offer replacement trailer-side 4-pole wiring kits that you can use to replace the damaged one on your boat trailer. For a trailer-side 4-pole we offer various lengths, such as the 4-foot Wesbar # W787264, 8-foot harness # W787268 and 14-foot # W787274. The Hopkins part # HM48240 that you referenced is a similar 20-foot harness. This features a wishbone construction, which means dual running light wires so that there is one for each side of the trailer. We also have a 35-foot long...
    view full answer...
  • Replacement 4-Pole Trailer Wiring Connectors and Harnesses for Harbor Freight Trailer
    Bargain-priced import trailers often use lower-grade parts that tend to wear out faster than better aftermarket products. This is as true for wiring items like your 4-pole harness as it is for other mechanical parts like bearings. We can help. For a replacement trailer-side 4-pole connector only that you can splice to your existing wiring you can use the Hopkins Endurance Quick-Fix Replacement 4-Way Flat Trailer Connector # HM48192. If you prefer a connector with wiring we have many styles...
    view full answer...
  • Wiring Guide for Installing Lights on Trailer with 5 Wires
    A trailer can have either 4-pole or 5-pole connectors and the number of actual wires can vary too. For instance, the part you referenced # 16-4B-1, is 4-pole wiring like what is included in a part like # W787274 which is a trailer-side 4-pole setup that carries stop, turn and tail light signals. There are also 5-pole connectors like # HM47910 that add one additional circuit that can be used for trailer brakes or another function. Then there are also wishbone style harnesses that have...
    view full answer...
    Image 1 for
  • Recommended Trailer Lights and Parts Needed to Install With Wesbar 4 Pole Flat Connector
    When using the Wesbar # W787274 you can just run a jumper wire for the running lights on the other side of the trailer; you're likely going to want to split the jacketing so that you can run the tail/blinker/brake light wires down each individual side of the trailer to allow for easier installation. If you need butt connectors you can use the Deka Heat Shrink Butt Connectors # DW05745-5 to make your wiring connections, and you'll need 14 gauge wiring to match the Wesbar harness. For lights...
    view full answer...

Do you have a question about this Trailer Wiring?

Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeff D
Video Edited:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Andrew S
Installed by:
Andrew S
Employee Adam E
Installed by:
Adam E

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