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Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long

Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long

Item # 707250
Our Price: $33.67
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Trailer Wiring
Shipping Weight: 0.75 lbs
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Wesbar Multi-Function Adapter Trailer Wiring - 707250
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This 18" long adapter plugs in to your 7-way, RV-style, vehicle-end connector to convert it for use with a 4-way or 5-way flat connector on your towed vehicle or trailer. Great Prices for the best trailer wiring from Wesbar. Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long part number 707250 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (65)
  • Q & A (0)
  • Videos (1)
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Wesbar Trailer Wiring - 707250

  • Wiring Adapters
  • Multi-Function Adapter
  • 4 Flat
  • 5 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • 7 Round - Blade
  • Wesbar

This 18" long adapter plugs in to your 7-way, RV-style, vehicle-end connector to convert it for use with a 4-way or 5-way flat connector on your towed vehicle or trailer.


  • Adapter converts the 7-pole, blade-style, connector on your vehicle for use with the 4-way or 5-way flat connector on your towed vehicle or trailer
  • Overall length: 18"
  • 1-Year limited warranty

707250 Wesbar Adapter - 7-Way Flat Pin Blade Style to 4-Way or 5-Way Flat - 18" Long

California residents: click here

Video of Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long

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

Video Transcript for Wesbar Wiring - Wiring Adapters - 707250 Review

Today we're going to take a look at the Wesbar 18-inch long adapter, 7-way RV, to a 4-way, or 5-way flat. This adapter will convert the 7-way blade-style connector that's on your vehicle, for use with a 4-way or 5-way flat connector that's on your tow, via car or trailer. Overall length on this cord is 18 inches long, end-to-end, and again, this is the part that would plug into the 7-way blade-style connector. On this end, you can see, there's where a 5-way would plug right into that, and you can also use a 4-way. A 4-way, when you plug it in, you just use the ground, which is the exposed terminal, and then the three right next to it. The end one would only be used if it was a 5-way, because the end one would be for the reverse light circuit.

That should do it for the Wesbar 18-inch long adapter, 7-way RV, to 4-way or 5-way flat connector.

Customer Satisfaction Score:

Customer Reviews

Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long - 707250

Average Customer Rating:  4.9 out of 5 stars   (65 Customer Reviews)

This 18" long adapter plugs in to your 7-way, RV-style, vehicle-end connector to convert it for use with a 4-way or 5-way flat connector on your towed vehicle or trailer.


Thank the TEAM for doing
a great job.


excellent product, ruggidly built and fits tightly for confident towing

Ernie I.




Worked great and was shipped promptly


Worked great, quality product!

by: 05/04/2023

Great company to deal with


Great quality product and lightning fast shipping!


Sturdy and well designed product. I like that the the unit is totally molded to the connectors without gaps or exposed wires.


The Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long is excellent.
The cable is thick, not flimsy. The end connectors are sturdy. It's a good product.

After receiving it today I was able to confidently connect my boat trailer to my Explorer and haul the trailer to get it inspected. Perfect ride. Thanks


Items were exactly as described and the Adapter and oval trailer light (amber). I accidentally ordered the wrong size Trailer wheel center caps (ordered 15" and I needed 14") the staff (Madison) was very helpful and friendly and walked me through the exchange process. Love doing business with etrailer.


I've got a flat 5 pigtail on my truck and boat. I bought this so my buddies late model GMC can tow my Ranger 1880MS. I gave it 5 stars but have yet to open the package and try it.


The item came quickly. Haven't had a chance to install and use yet.


Works perfectly. No problems.


Awesome, this adapters extender and 7 way to 4 way adapter offers a 2_in_1 deal, provide flexibility in connection source and offers extended cable length for connection to various devices.


Found trailer after quick internet search, explained what I was looking for and they steered me right to it. Works perfectly on my 2018 Acura MDX. I ordered and received it in just few days. Would certainly shop here again!


It was exactly what I needed. Works well. Got it in great time and exactly what I wanted.
Thank you etrailer





Etrailer has been a life saver for our business! We repair trailers and install truck accessories and have found etrailer to sell name brand parts at much cheaper prices. Melissa A is absolutely the BEST!!


Perfect length for 3/4 ton Chevy with trailer plug in the bumper. Very satisfied and good, timely service. Thanks George.


High quality electrical adapter.


Excellent quality and the answer for backing trailers using the "key" lockout.


needed to extend my light cord on my new Silverado pickup. old cord would not reach ,and did not want too splice into my new boat wiring WORKS FINE GREAT CORD


Very good product. Works well and solid construction. Ordered product on
Friday morning and it was delivered on Monday, Great communication from
etrailer throughout process.


Good service...friendly & helpful staff...fair prices.....


Good product. Exactly what I needed. Very prompt delivery. You are the go to people when I need something! THANKYOU!!


Product was excellent. Perfect interface with my SUV. Shipping and tracking were great. Couldn't be more satisfied.


Works great



Still works GREAT

Show More Reviews

See what our Experts say about this Wesbar Trailer Wiring

  • Is 7-Way of Westbar Adapter # 707250 USCAR Standard Pin Out
    The USCAR pin out is the standard 7-way pin out which the Wesbar adapter part # 707250 matches.
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  • Will Wesbar 7-Way to 5-Way Adapter 707250 Fit 2013 Chevy Silverado
    Yes, the Wesbar 7-way to 4/5-way part # 707250 is exactly what you would need. This would plug right into your 7-way and give you a 4-way or 5-way flat connector for your trailer.
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  • Wesbar Adapter 7-Way To 4 or 5-Way Flat Adapter Compatibility With 2017 Chevy Silverado
    Yes, the Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long # 707250 is compatible with your 2017 Chevy Silverado Z-71 with trailer package. This adapter will fit into the factory 7-way connector to allow you to use a 4-way flat trailer connection or a 5-way trailer connection.
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  • Recommended 4-Way to 7-Way Vehicle Wiring Adapter
    The Adapter 4-Pole to 7-Pole and 4-Pole part # 37185 is a great and easy way to convert the 4-way you have to the 7-way you want and still have a working 4-way if needed in the future. This is a simple plug and play installation if you are only looking for the lighting signals you will simply plug in the 4-way to the adapter and you're all set. Simply ground the connector to the vehicle frame or an existing ground.
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  • 4-Way to 7-Way Trailer Wiring Adapter for Tow Vehicle
    To adapt the 4-way on your vehicle to match the 7-way on your trailer you'd just need the part # 37185 and you'd be set.
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  • Adapter Recommendation to Go From Vehicle 4-Way to Trailer 7-Way
    The adapter you need to go from a 4-way to a 7-way is the part # 37185 which your 4-way will plug right into and give you a 7-way that has all of the taillight functions covered. If you ever need to activate other trailer functions like brakes or 12 volt accy those wires will be ready to be used on the adapter.
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  • How To Convert From A 7-Way To A 5-Pole Connector For Towing A Boat Trailer
    If your truck has a 7-way connector then you already have a pin for the reverse lights, but it might not currently be hooked up since a lot of people rarely use it and will typically just cap it off. The reverse light function on a typical 7-way is the center pin. You can take the boot off of your 7-way and get into the wiring to see if you have the wire ran or not. If not you'll connect a wire to the center terminal and splice it into the reverse light circuit in either one of your tail...
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  • Recommended 7-way to 4-way Flat Trailer Connector Adapter
    Yes, we have a few options for a 7 way to 4 way flat trailer connection. One option if you don't need an extension is the Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover, # 47345. This adapter has an LED tester internally to allow you to check your vehicle side trailer wiring functions at the connection. If you need an extension adapter, I recommend the Wesbar Coiled Adapter - 7-Way RV to 4-Way or 5-Way flat # 787196 for an 8 foot option. For a much shorter extension adapter...
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  • Converting 5-Way Trailer Connector to 7-Way for 12V Power
    The reason you aren't finding anything is because a standard 6-way or 7-way trailer connector moves to the round style like what you have on your truck. What you need to do is swap out your 5-way flat with a 7-way trailer connector like the # H20046. You will match up your existing connections with those on the new 7-way and then connect the 12V power running from your battery. Make sure you match the functions and don't just match colors since they aren't always the same. See the chart...
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    Image 1 for
  • How To Connect A 7 Way to 6 Way On A Camper
    If you already have a 6-way square connecter on your camper, the best thing for you to do is to remove the 6 way-square connector and replace it with a 7-way connector. The 6-way square plug is an unique plug. When you cut off the 6 way square plug and connect The Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End # PK12706. Then you would connect the wires to the new 7 way like below. Before cutting off the 6 way plug I would test the wires to see what goes where first....
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  • Why Do 4 to 7-Way Trailer Connector Adapters Have Missing Pins Inside the 7-Way Plug
    In order to convert a trailer from a 4 or 5-way flat to a 7-way round you will need to use the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box part # e99011. The reason for this is because 4-way or 5-way flat trailer connector only carry circuits for stop/turn, running, and sometimes reverse lights. The 7-way has all of these circuits as well a brake output and a battery charge line.
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  • 7-Way to 4-Way Adapter With Lamp-Out For a 2023 Mercedes GLS With LED or Incandescent Trailer Lights
    The 7-Way to 5-Way/4-Way Trailer Adapter # TR20141 will prevent the error light when towing a trailer with LED tail lights behind your 2023 Mercedes-Benz GLS. It will also allow for a trailer with incandescent lights to also work so you will not need a 2nd adapter.
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  • Adapter Needed To Convert A 7-Way To 5-Way And Lockout Surge Brakes
    If you have a factory 7-way on your vehicles they should be wired to the reverse light circuit so all you would need is an adapter to go from your 7-way to a 5-way like part # 707250. Typically this wire is purple or yellow and is the center pin of the 7-way. You can put your tow vehicle in reverse and use a tester like # PTW2993 to see if the 7-way is indeed wired to the reverse light circuit or just use the adapter to test if it is. If it's not then you'll need to run a wire from the...
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  • Recommended 7-Way Trailer Connector to 4-Way Vehicle Connector Adapter
    Yes, you can use the Wesbar Adapter item # 707250 to connect a 7-Way trailer connector to your Escapes 4-way connector. However, you won't be able to control the brakes or have an accessory line that keeps your battery charged. If you are concerned about these functions you will want to add the Universal Installation Kit item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the rear of your Escape with an included bracket. This kit is designed...
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  • Adapter for Boat Trailer with 5-Pole Flat Trailer Connector
    Since your boat trailer has a 5-pole connector with 6 wires, you have what's known as a wishbone harness, with the running lamp circuit split into two wires, with one running down each side of the trailer. To make this work with the 7-way connector on your tow vehicle, you'll need an adapter like # 707250. In order for the reverse lockout on the trailer to function, you'll want to make sure that the center pin on your 7-way is tied into the reverse lamp on your truck. You can confirm...
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  • Recommendation For Using Trailer 4-Way With Vehicle 7-Way
    Since you have a 7-way wired into your 2016 Ford Transit, I recommend using a simple adapter to go from a trailer with a 4-way to your vehicle's 7-way. This will allow you to easily switch between the two by simply inserting or removing the adapter as needed. I recommend the Pollak 7 Pole to 4 Way Connector Adapter # PK12716 for just a plug, or if you want some length, the 18" long Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat # 707250. I have added links to video reviews of these...
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  • Recommended 7-Way to 4-Way Wiring Adapter for 2015 VW Tiguan R-Line Package
    It sounds like you you have a standard 7-way trailer connector, so I recommend either the Pollak 7 Pole to 4 Way Connector Adapter # PK12716 or the Wesbar Adapter - 7-Way RV to 4-Way # 707250. If you happen to have a European 7-way, then you will want adapter # 118710.
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  • Does 2003 Mercedes ML320 Need Brake Controller to Activate Trailer Brakes
    Sounds like the brake lights circuit of your trailer wiring was either accidentally or intentionally ran to the brake output circuit of your trailer wiring which is why your brakes lock up when the brakes are touched. You do need a brake controller to take care of applying the brakes as full 12 volts from a light circuit will always lock them up. A brake controller will vary the voltage of the circuit to give the brakes the correct amount of pressure. The easiest solution is the Curt...
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  • Recommended Trailer Wiring For A 2016 Volvo XC60
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56355 you referenced is a compatible fit for your 2016 Volvo XC60. This custom-fit T-connector plugs into your vehicle's wiring harness, which is located in your rear cargo area. You will have to remove the trunk floor coverings and the rear scuff panel to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and...
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  • Creating 7-Way Trailer Connection Adaptor for 13-Way European Bike Rack Lighing
    We do not have any European 13 way adapters to make your bike rack lights compatible so you will need to rewire it. So you would need to create a custom adapter using a 7-way connector and probably a junction box to protect an external converter box that you will need to separate the stop light from the turn signal for your 13 way bike rack wiring. For this conversion, I recommend the Vehicle to Vehicle Tail Light Converter # 118158 along with the Wesbar Adapter - 7-Way RV to 4-Way or...
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  • Recommended 5-Way Adapter Harness
    In order to add a 5-way harness to your X5 you'll need to use the Curt Trailer Connector Adapter item # C57187 with a 4-way connector like the Curt Powered Tail Light Converter item # C59236 you were looking at. I am sorry but they don't make vehicle specific 5-way wiring harnesses which is why you need the adapter. If your vehicle has a 7-way connector you will want to use the Wesbar Adapter item # 707250.
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  • Replacement Trailer Side Connector with Jacketed Wire
    It sounds like you're looking for a trailer side 5-way connector but your picture is of a 7-way. If you're looking for a 5-way we have part # HM47910 that has a nylon sleeve covering the wires to protect them. I've linked a video for you as well. If you're actually looking for a 7-way then instead look at part # H20043. It's a jacketed trailer side connector. This video is linked as well.
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    Image 1 for
  • Wiring Adapter for 4-Way Connector on 2014 Ram 1500 Snug Top Canopy
    What you need to pair the 4-Way on your Snug Top Canopy to the 7-Way connector on your 214 Ram 1500 is the Pollak 7 Pole to 4 Way Connector Adapter # PK12716, but if you need a lead to reach the canopy wiring then the Wesbar # 707250 might do the trick since it's the same thing but with an 18" wire lead. If this doesn't look like what you have on your canopy please reach out with some photos and I'll be more than happy to help you figure out what you're needing!
    view full answer...
  • Recommended Wiring or Adapter for 7-Way Connector to 4-Way Utility Trailer Plug
    A trailer can be wired to connect to a 7-way without using all the functions. I recommend the Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long # 277-000141 to give you a clean molded connector and then only connect the functions in the junction box needed for the trailer. Your other option is to use a basic adapter from 7-way to standard 4-way like # PK12716 or # 707250. When making electrical connections a little dielectric grease like # 11755 will help with the electrical...
    view full answer...

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