Difference Between 7-Way Round and 7-Way Blade Connectors

Question

Question:

is there a difference between a 7 pin round style trailer connector and a 7 way rv blade connector? i keep seeing the two different descriptions of seemingly the same part, is it just different terms for the same style connector?

asked by: Scot

0

Expert Reply:

There is a difference between a 7-way round and and 7-way rv blade connector. If you take a look at the accompanying photo, which is from our linked article on trailer wiring you can see that the connector on the left has blade-style pins while the one on the right has round pins.

There is even an adapter, the Trailer Connector Adapter # HM47425, which is a 7-pole round to 7-way blade if you need to go from the uncommon 7-way round to more common 7-blade.

I have linked each of our available 7-pin round and 7-way blade connectors for you to take a look at as well.

expert reply by: Kyle S

0

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Jason M.

4/13/2020

It seemed the other day when I went to pull home a toyhauler we just purchased, the camper plug didnt fit exactly correctly. The truck plug is the factory 7 blade plug on a 2016 Toyota Tundra. It seemed like the male blade part on the truck was too big to slide in the female camper plug. The width was fine but the trucks metal blade are, what I would call, folded over spring type metal prongs, to where the camper plug looks like it takes more of a single thickness metal spade terminal. It all actually worked, but it was only held in by the spring-loaded cover pressure holding it in place. It did get us home but I want something that makes better contact. Do you have any thoughts on this?

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Chris R.

4/14/2020

I think you might just have two 7-Ways that have enough manufacturer variances with regards to their size/design that they just don't completely get along. If the trailer was equipped with a 7-Way round pin (instead of the blade on your truck), it not only wouldn't fit, but nothing on the trailer would work either - as the actual functions are configured differently between the two. If it's a brand new trailer (with a brand new connector) it might just take a few plugs to loosen things up too.

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Answer 1

It sounds like you have a 7-way blade connector on your boat trailer as that is a very common connector on boat styles. This connector has 6 pins around the outside of the connector and a center pin for a total of 7. Part #A7WCB would be what a 7-way…

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Answer 2

The 7-Way blade style trailer connector is the most common 7-Way in use at this time. It would be beneficial to switch to this style. However, if you already have a 7-Way round connector you can just use an adapter to go to a 7-Way blade style when…

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Answer 3

Hey Russ, sorry for any confusion but the trailer taillight kits we offer like the Optronics part #TLL9RK that you referenced all use standard 4-way connectors. So they would plug right up to the 4-way of your vehicle.

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Answer 4

The only difference between 7-Way Utility and 7-Way RV is the color of the wires. The pin outs are the exact same so either would work just fine with the other. If you check out the picture I attached you'll see that the functions are all the…

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Answer 5

The #30717 is exactly what you're looking for as long as you don't need the 7-way to supply anything other than lights on the trailer. You just plug the 4-ways together, connect the white ground wire to the vehicle's frame using the…

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Answer 6

I have an excellent option for you to setup your 2020 Jeep Wrangler Unlimited for both trailer towing and dinghy towing. The Curt T-Connector Vehicle Wiring Harness part #C56407 will transmit the trailer lights and the Curt Custom Tail Light Wiring…

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Answer 7

The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring #HM40975-11998 is a hard wire application, as you can see in the linked installation video we made of this being put on a 2008 Ford F-250. If you only need to connect the…

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Answer 8

I do believe you're asking how to determine whether or not your RV has a combined or separate lighting system. If the motorhome’s trailer plug energizes the same pins on the 4 way connector for both brake lights and turn signals, then a 3-to-2…

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Answer 9

For a 2023 Jeep Wrangler 4XE you'll need the following components: Baseplate: Roadmaster Direct-Connect Base Plate Kit #RM-521453-5. These custom-fit baseplates are designed to work with factory bumpers, if you have an aftermarket bumper please…

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Answer 10

The part #HM40975 is designed to fit the round 7-way connector that is found on several vehicles. To install it would require your vehicle to have this round connector. (see picture) If instead you needed a way to hardwire in a 7-way to a vehicle you…

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Answer 11

To flat tow your Jeep Wrangler JK behind your motorhome, you will need a base plate kit, tow bar, safety cables, tail light wiring harness, and a supplemental braking system. Depending on the year of your Wrangler, you may also need a Brake-Lite…

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Answer 12

The electrical cord that comes with the Roadmaster Nighthawk All Terrain #RM-676 is already routed through the cable guide but the safety cables are not. This is because some people prefer the cables to be set up on their own. If you want the cables…

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Difference Between 7-Way Round and 7-Way Blade Connectors

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