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Dust Cover for Wesbar 4-Pole Flat Connectors

Dust Cover for Wesbar 4-Pole Flat Connectors

Item # W787301
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This rubber dust cap fits over a Wesbar trailer- or vehicle-end, 4-wire flat plug to protect it from damage caused by dust and corrosion. 1-636-306-4830 to order Wesbar accessories and parts part number W787301 or order online at Free expert support on all Wesbar products. Guaranteed Lowest Price and Fastest Shipping for Dust Cover for Wesbar 4-Pole Flat Connectors. Accessories and Parts reviews from real customers.
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  • Reviews (40)
  • Q & A (0)
  • Videos (2)
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  • Why etrailer?

Wesbar Accessories and Parts - W787301

  • Trailer Wiring
  • Wire Protection
  • Connector Covers
  • 4 Flat
  • Wesbar

This rubber dust cap fits over a Wesbar trailer- or vehicle-end, 4-wire flat plug to protect it from damage caused by dust and corrosion.


  • Fits a Wesbar trailer- or vehicle-end, 4-way flat connector when it is not in use
  • Protects the connector from damage caused by dust and corrosion
  • Constructed of durable rubber
  • 1-Year limited warranty

787301 Dust Cover for Wesbar 4-Pole Flat Connectors

Video of Dust Cover for Wesbar 4-Pole Flat Connectors

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 Dust Cover Review

Ryan: Hey everybody, Ryan here at etrailer. Today, we're going to be taking a look at the Wesbar dust cover for four way trailer connector ends. So these dust covers are pretty straightforward, really not anything too complicated about them, but they are a pretty important little piece that'll help keep all your terminals protected.And a lot of times what will happen is over time this might break or kind of start to dry rot, something like that. But it did it's job, so your four way connector is still in good shape. So wouldn't make a lot of sense to replace your connector itself when it still works. So don't bother getting a whole kit.

You can get just a cover and replace that.That way, you can still keep it protected and have years of use with it. Now, believe it or not, these do a pretty good job of preventing that corrosion on your terminals, especially trailers that are stored outside for long periods of time and things like that. You can imagine if you just have this connector exposed after the rain, the heat, the cold, the snow, all that weather, these are going to deteriorate over time. They're going to get corroded and become unusable.So by just using a small cover like this, it keeps them out of that weather and protected. So this cover itself is a relatively thick rubber actually.

And so I see it lasting for quite a while. Really don't see it wearing out. I can get some pretty good use out of it. And today, we just put on this brand new Wesbar four-pole connector, and I want to keep it in good shape. So that's why I went ahead and grabbed the cap too.

That way I'll keep it protected.Now, what's nice is is inaudible 00:01:53 say if your vehicle has a four way that we can hook up to your trailer, if you don't have a cover on that one, you can just grab two of these and have one for each that way you keep them both protected, working. Because you know as well as I do, it's always a headache whenever you plug in your trailer, test your lights. They're not working. You're trying to look around and figure it out. And it never fails.

It's usually at night time or in the rain, something like that.So something like this can just prevent that hassle. What you can do too, is actually use the dust cover as almost a keeper. So what I like to do when I'm not towing is just loop it around a bolt here on the trailer and then I can just close it up and that'll keep it in one spot, keeps my wiring off the ground and everything else. So just a neat, little tip that I thought I'd share with you.There is one thing I do recommend using in conjunction with your dust cover and that's some dielectric grease. You can grab that here at etrailer. And from time to time, apply that to the terminals. And with the combination of both of these, you really shouldn't have any issues of corrosion or problems like that.Now to get the cover on, it's super easy, you don't have to cut your wires and slide it on first or rewire them up or anything like that. All you simply have to do is take the end of it here and just work it right over your four way connector. And the one I have today is actually a five wire. And so it's actually relatively wide and you can see no issues, slides right over the way it should.So at the end of the day, just a small preventative measure you can take to help extend the life of your wiring connector. And that'll finish up our look at the Wesbar dust cover for four way flat trailer connector ends.

Customer Reviews

Dust Cover for Wesbar 4-Pole Flat Connectors - W787301

Average Customer Rating:  4.4 out of 5 stars   (40 Customer Reviews)

This rubber dust cap fits over a Wesbar trailer- or vehicle-end, 4-wire flat plug to protect it from damage caused by dust and corrosion.


Bought the dust cover along with the Wesbar cable and it has held up very well. The rubber has stayed soft and pliable for more than a year. Excellent protection for the plug.


These were kind of hard to find.I bought 2, 1 for my trailer and the other for my cargo carrier. Now all the plugs are protected


Not a snug fit on the Wesbar connector and will not work on other brands of connectors. We have a 4-wire and a 7-wire harness on the same trailer and bought this cover to prevent the 4-wire plug from grounding out on the trailer's frame when the 7-wire was in use. Loose fit issue solved with some electrical tape on the plug and cover.


Thank you for your quick reply & shipme nt.

Patrick - 10/01/2021


I purchased this dust cover to prevent corrosion on my trailers wiring harness plug when not in use. The product was easily installed and fit well on my 4 pin plug.


Cover was too small and did not fit my 99 ford truck wiring plug. For the price I paid, not worth sending back. However it did fit my 2015 Jeep wiring. Must have been a design change to plugs after 1999


Cathy was very helpful & knew her products well. I ordered the cover once before & she was able to find the order quickly to re-order for me as the other cover fell off. Neither of us could figure out why the original cover had fallen off. Hopefully, this one will remain attached.

It was lost by the dealer when they washed the car. They replaced the part.
Patrick D - 06/11/2020


These covers are exactly what I was looking for and they arrived simple quick. Ordering was easy! Thanks! It's always better to find the product one needs to do the designed task. I was shielding these connector ends with plastic bags and My arrangement lacked class.


product was wrong fit. supposedly was to fit OEM male plug but was too small. ended up buying a whole new plug/cover assembly and wiring it into truck for a total replacement. That works.


The above product is great for storing and keeping my trailer pigtail clean and out of the weather. Easy to install. No more bad trailer plug connections!


Good vendor and quality part I just didn't fit my connector at all. I think it's best when you get both sides of this at the same time so you know it's going to fit up together. Can't use mine at all even after trying to modify the prong side.


I wish there was a photo of the inside of this cover. It is made for a vehicle end of a flat 4 connection, not the trailer end. I had to cut some of the rubber form the inside to make it fit.


Everything works well. I will definitely order form etrailer again when I need stuff.


Fits like a glove, very flexible, Great Price. Keeps my trailer connections nice an dry.
A ++++++++++


The two products is exactly what I wanted! They came super fast, I will order from ETrailer again!


Support staff was incredibly helpful


The cover is a little loose on the 4 way connector.


Product works great, will buy from again, wonderful service,,,George did a great job handling everything.


very well built flat 4 pole plug should give me years of service in the coming winters.


Cover does not fit Hopkins Connector


Cap protects from corrosion. Works grest

Great. Just what I needed to protect against dirt and limit corrosion.
Malcolm w - 10/15/2017


Works fine

Still like new
Mike - 03/25/2019


Good Quality, as described


Product received in a timely manner. Thank you so much for the excellent service and follow up. Will buy from you again.


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Info for this part was:

Employee Tyler C
Written by:
Tyler C
Employee Jameson C
Expert Research:
Jameson C
Employee Joshua S
Video by:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Ryan G
Installed by:
Ryan G

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