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Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' Long

Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' Long

Item # 787207
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787207 - Plug and Lead Wesbar Wiring Adapters
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Lowest Prices for the best trailer wiring from Wesbar. Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' Long part number 787207 can be ordered online at or call 1-800-496-5010 for expert service.
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Wesbar Trailer Wiring - 787207

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


  • Adapts 7-way flat pin blade connector to 5-flat connector
    • the 7-way end mates to OE style 7-way blade connectors
    • the 5-way end mates to either a 4-way or 5-way flat connector
  • Provides the following 5 connections: ground, running lights, left turn/brake signal, right turn/brake signal and reverse lights
  • Sealed 16 gauge coiled wire to prevent tangling
  • No-fade marine yellow color
  • Length: 4'

This heavy-duty, coiled cable adapter is compatible with a 7 way RV blade trailer socket on the vehicle and adapts it to work with a 4 or 5-wire flat connector on the trailer.

787207 Wesbar Coiled Adapter 7-Way Flat Pin Blade Style to 5-Flat - 4' Long

California residents: click here

Video of Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' 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 - 787207 Review

Today we're reviewing part number 787207 from Wesbar. This is a vehicle trailer coiled wire jumper. It has a 7-way trailer side connector on this end, and a 5-way flat connector for the vehicle end on the other side. This is a heavy-duty coiled cable adaptor that's compatible with a 7-way RV blade trailer socket on the vehicle, and it adapts it to work with the 4- or 5-way flat connector on the trailer. The 7-way end mates to an original equipment style 7-way blade connector, and the 5-way end mates to either a 4-way or a 5-way flat connector. It's 4' long when you uncoil it.

This is a sealed 4' long 16-gauge coiled wire that will not tangle, and it's made in the color marine yellow that will not fade. And there you have it for part number 787207 from Wesbar, the vehicle trailer coiled wire jumper.

Customer Reviews

Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' Long - 787207

Average Customer Rating:  4.8 out of 5 stars   (86 Customer Reviews)


Recently bought a used boat and trailer and needed this connection for the lights to work. I wasn’t able to find it locally but Etrailer had a couple of choices in stock. Works perfectly, fast delivery.

Still works like new after saltwater use
Jamie - 01/25/2022


I purchased this Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4' Long
for my boat and have to say after many towing trips to the water this thing is bullet proof, heavy duty and is built to last for many years.

I would highly recommend this for any type of towing application's


Just what I was looking for to maintain a consolidated connection between my boat trailer and truck. I will definitely check your site again if I need any future trailer supplies. Only other comment would be to have manufacturer offer it in black.


Good product. Had an issue until I coated connectors with dielectric grease. Now works flawlessly.

Sold the boat. Still worked great at that time
Guy G - 12/06/2020


Makes hooking up the trailer much easier. Highly recommend it.


Out standing product. This is easily one of the best trailer power extensions out there. Coils up back into smaller form factor after every use and stays firmly connected into the 7 pin or 5 pin connection without wiggle room. I use for my boat connection and you don't have to worry about the hair pin turns pulling on the electrical connection as the coil allows for that extra room. This cable is highly recommended for anyone with this type of connection.


It was what I required


Superb customer service, very friendly and helpful staff. Excellent products with affordable prices and quality craftsmanship. I will be a returning customer and also let everyone I know of etrailer Corporation. Thank you!


TFX225 was good
TX430-1 was good also
787207 is not a 7 way pin to 5 flat, IT IS A 5 PIN TO A 5 FLAT,
product didn't work. I initially thought it was a defective product but was told no by customer service that a 7 pin always has 2 dummy locations. Info was forwarded to Tech Service who called later that day stated the above and that my trailer shouldn't be working as I have stated it does. Four separate vehicles have towed my trailer and none have had an issue with it and the electric brakes work fine with the controller. It was strongly implied that I have messed with the trailer wiring, which I hadn't.

I believe I know what is going on. A basic 4-pole flat has the following 4 connections: ground, running lights, left turnbrake, and right turn/brake. A five pole flat either adds an electric brake circuit or reverse light circuit. The reverse light circuit is used quite a bit for boat trailers. They use hydraulic actuator brake systems and the reverse light signal is used to lock-out the brakes for backing down a boat ramp. This adapter is wired for reverse lights on the 5th pin, and your trailer is wired for electric brakes on the fifth pin. The center pin of the 7-way is used for reverse lights, not brakes. So the brakes on your trailer will engage when you put the vehicle into reverse.
-- Etrailer Expert Patrick B - 10/08/2013


Product works very well for my MasterCraft boat trailer. Well made and I do like the coil which keeps the long cable from drooping when in use.

Product still works and looks new. Great product.
Nick O - 12/28/2017


The trailer connector was competitively priced, shipped quickly and arrived on time. I tested it and it works just as advertised. I ordered a 4' long coiled adapter and that is what I received, but I should have ordered the longer version as the 4' long version is stretched pretty tight on my boat trailer to truck connection. But, that is my error and has no bearing on the product quality or I would order again from this company. Keith Z.


This was just what I needed to hook up my trailer lights to my new vehicle! I needed to convert my 7 pin vehicle connector to my 4 pin trailer connector, plus I needed a little extra length for my trailer pigtail to reach the factory connector on the vehicle. The delivery was fast too! Thanks!


I was originally concerned that this adapter might be to light weight but it turned out much better than expected. Excellent product!

The wiring harness adapter still works great.
Cheryl T - 09/21/2016


Can't really say much about the product itself other than it works as expected & is a fantastic design w/ the coiled cable. My main glowing recommendation is for etrailer itself, as I have received stellar customer service from time of order to receipt of product ordered. Very helpful, professional, personal(sized), & prompt. I couldn't ask for anything more from a company! Thank you, etrailer! :-)


It is what I ordered, came to me in fair time, and works perfectly! Thank you etrailer.


Product worked as expected. Great service. Needed item NOW shipped to a remote lake in AR. Will do business with etrailer again.

Still working well!!!!!!
Tom N - 04/23/2016


Both items perfect as always. Hitch lock long enough for up to 3 plus inches if needed which is great and the 5 pin adapter in the coil makes it so handy you will want all your cords like it.


Hard to find product. Etrailer offered 3 different ones.
Quality of the product is good. Will make my life


The product is holding up very well and works great for keeping the wiring out of places it should not be.


The cord end look to be hi quality with the extra cord coiled for any stretch that is needed. The yellow cord is faded new out of the box and the coating is very tight this may not weather well, guess time will tell. Over all for the price seam to be a good product.

the product is working well
Randall P - 05/04/2017


Phone staff was very helpful and knowledgeable. While I had a good description of what was needed I was asked all the right questions to be sure that I got the correct part to suit my needs. Let's hope the trailer brakes don't come on in reverse any more. Thanks for your help.


etrailer was just about the only place I could find rv to car connection for our particuular connections-7 to 5, flat connection. Big plus for them on that fact. Bigger plus is that I needed the part fairly quickly being at our location for just a few days. etrailer got it to my brother,s house nearby in two days. etrailer will be one of my go to sites when looking for rv parts.


Product IS as promised! Quality is good and the shipping fast. Wish I would've simply looked here to begin with. My 4runner has the plugin for a trailer way up and away from the trailer tongue and this adapter done the trick.


Excellent works perfect


Product was exactly as ordered. Very well made and very reasonably priced. Very fast delivery thank you e-trailer.

Show More Reviews

See what our Experts say about this Wesbar Trailer Wiring

  • 7-Way to 5-Way Extension Adapter for Boat with Surge Brakes
    Actually the part # 787207 that you mentioned would be the perfect solution for you to use. The 7-way of the adapter will plug into the 7-way of your truck and then the coiled extension will give you 4 feet of extra wire to attach to the 5-way of your trailer.
    view full answer...
  • Will Coiled Adapter 7-Way to 5-Flat Adapter part # 787207 Work on a Boat Trailer with Surge Brakes
    The Coiled Adapter 7-Way Flat Pin Blade to 5-Flat # 787207 WILL work for you as long as the reverse light circuit is active on the 7-way of your 2012 Toyota Tundra (it should work). The reviewer you referenced unfortunately was confused on what this product does. Since one end of this adapter only has 5 circuits then there is no way 7 circuits could possibly be carried through the adapter. Since you have surge brakes those additional 2 circuits would not be necessary for you since they...
    view full answer...
  • Dimensions of Wesbar Coiled Adapter 7-Way Flat Pin Blade to 5-Flat
    The Coiled Adapter 7-Way Flat Pin Blade to 5-Flat # 787207 cord has a 0.35" diameter and the coiled section is 5.5" long. I have attached a photo demonstrating this.
    view full answer...
    Image 1 for
  • What are Pin Functions of 5-Way End on Wesbar Adapter # 787207
    When looking at the 5-Way end of the Wesbar Coiled Adapter # 787207 like you described, with the male pin being number 5, the pin functions are as follows: 1. Backup Light Circuit 2. Right Turn/Brake 3. Left Turn/Brake 4. Running/Tail 5. Ground With this in mind it definitely looks like something might be miswired on your setup. The first thing I recommend doing is testing the 7-Way on your RV in the same manner that you tested the 5-Way on the adapter. The functions should match the...
    view full answer...
    Image 1 for
  • Needed Connection of 7-Way Flat Pin Blade to 5-Flat/4-Flat
    It is a 7-Way Flat Pin Blade to 5-Flat/4-Flat. To be used with something such as the # 787207 used for the 7 way RV blade trailer socket on the vehicle and adapts it to work with a 4 or 5-wire flat connector on the trailer.
    view full answer...
    Image 1 for Image 2 for
  • Recommended Wiring Adapter For A 5 Pin Connector To A 7 Pin Round Connector
    When it comes to towing your 5 pin aluminum boat trailer with your 2009 Toyota Tacoma with a 7 pin round you need The Coiled Adapter 7-Way Flat Pin Blade to 5-Flat - 4 foot Long # 787207. The 7 pin side will plug into your vehicle and the other side will be a 5 pin which will plug into your boat trailer. The wiring has a 16 gauge coiled wire to prevent tangling, and has a no-fade marine yellow color. I attached a review video link below.
    view full answer...
  • Old Trailer Wiring 5-Way had 6 Wires But New 5-Way Has 5 Wires
    The trailer connector that you had is what is called a wishbone harness. It has 2 running light wires so you do not have to run a jumper wire for running lights from one side of the trailer to the other. Wesbar harness # W002290 is an example of a wishbone 5-Way. All you have to do is connect the 2 running light wires from the trailer wiring together and then to the brown wire on the new harness. Or, if you are replacing all the wiring, you would run a jumper wire from one side of the...
    view full answer...
  • Availability of Flat Towing Umbilical Cable Longer Than 3 Feet in Length
    We do offer some longer coiled cables that would work for you. Wesbar offers a 7-way to 5-pole coiled adapter, that will also work fine for a 4-pole. For a 4 foot length, use part # 787207. For an 8 foot length, use part # 787196.
    view full answer...
  • Is There a Different Sized Plug Version of the Wesbar 787207?
    The simple answer to this is going to be no, because trailer connections adhere to an industry standard in order to ensure compatibility between different manufacturers and for end user convenience. Trailer connector adapters like the Wesbar # 787207 will be the same size as something like the Hopkins # HM47065 -they are all going to have the same dimensions assuming they're the same type of connections (7 flat, 4 or 5 blade, etc.). For these reasons, the 7 way end on the Wesbar # 787207...
    view full answer...
  • How to Use the Coiled Adapter 7-Way to 5-Flat Part # 787207 with a Reverse Lockout Solenoid
    I assume you are referring to the reverse lockout solenoid wire and if that is the case then you would need to wire or check that the trailer side trailer connector has this wire on the far left pin which you can see in the attached photo of the Coiled Adapter 7-Way Flat Pin Blade to 5-Flat part # 787207. This pin should then match up with the reverse light circuit on your vehicle's 7-way.
    view full answer...
    Image 1 for
  • Recommended Way to Re-Wire a Boat Trailer with a 7-Way Plug
    The adapter will work but it's more of a short term solution because of the potential corrosion issues in the future not to mention when you introduce additional connection points problems can arise. I would test the reverse lockout (purple or blue wire) with a circuit tester with the 7-Way center pin. If that works you are good. I would recommend rewiring the trailer with a 7-Way plug because it will prove to be more reliable than using an adapter. I would start with a trailer junction...
    view full answer...
  • Towing Triton Bass Boat Behind 2017 Ram 1500 Short Bed with Lance 650 Truck Bed Camper
    In order to tow your Triton boat behind your 2017 Ram 1500 with the Lance 650 on board, you need a Class V hitch like the Curt # C15572 . Once you have the Class V hitch, you need an extender bar similar to the Hitch Extender # HE18 paired with an extended ball mount like the Hidden Hitch 15-3/4" Extended Ball Mount # 80232 in order to get the correct length clearance from the back of your camper. You'll also want to consider adding a wiring extension like the Wesbar Coiled Adapter 7-Way...
    view full answer...
  • How Many Wires Inside Wesbar Coiled 7-Way Flat Pin Blade to 5-Flat Adapter # 787207
    The Wesbar Coiled 7-Way Flat Pin Blade to 5-Flat Adapter # 787207 actually has 5 wires. This adapter takes a trailer-side 7-way plug and mates it to a 5-pole flat connector. All 5 pins on the 5-pole are connected at the 7-way side but a 12V power feed and trailer brake circuit are NOT supported. Two pins on the 7-way are inactive. If you need 7-wire jacketed cable we offer Deka # DW04914-1 which is sold by the foot and that has no connectors included. Or if you need a 7-way with the trailer-side...
    view full answer...
    Image 1 for
  • Recommended 2-1/2 Inch Trailer Hitch Extension and Wiring for Boat Trailer Behind In-Bed Camper
    It sounds like you need about a fairly long extender and there unfortunately is not an extender that isn't also a reducer for your 2-1/2 inch hitch receiver. My recommendation is to use the Curt Hitch Extension and Reducer for 2-1/2" Trailer Hitches - 24" to 34" Long # C45048 which has the same capacities as the similar Reese # RP45292 and then use a more cost effective option for your ball mount like the Curt Channel Style Adjustable Ball Mount # C45900. This will give you an adjustable...
    view full answer...
  • Recommended 5-way Connector To Replace Damaged 5-way Connector With Two White Wires
    I have an option for you, but we do not carry a 5-way connector that has two white wires. What I recommend is the # A40W5B which has the two brown running light wires, one green passenger turn signal and brake wire, one yellow driver side turn signal and brake wire, and a blue wire which is commonly used for a reverse lockout solenoid. You will need to cut the connector off the # A40W5B as far back as needed and match the colors. Since you have two ground wires you will need to cut the...
    view full answer...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Brian T
Updated by:
Brian T

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