The 7 Best 4 Pin round Plugs (2023 reviews)

We consider a 4 pin round plug to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Super repairman 4 Pin round Plug READ REVIEW

Best tow Hitch light Plug: Buy: WOFTD 4 Pin round Plug READ REVIEW

Best For Boat: Buy: COROTC 4 Pin round Plug READ REVIEW

Best With No problems: Buy: Kohree 4 Pin round Plug READ REVIEW

Best For RV hookup: Buy: Pollak 4 Pin round Plug READ REVIEW

Best For multiple Trailer types: Buy: Oyviny 4 Pin round Plug READ REVIEW

Best Easy To Use: Buy: online LED 4 Pin round Plug READ REVIEW

Best Overall: Super repairman 4 Pin round Plug

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It’s nice to have two different pins, a 4 & 5 plug. This plug allows the use of both 4 pin and 5 pin trailer plugs, so it serves double duty in a single unit. If you have a trailer with surge brakes it uses the reverse light signal to let you back up without locking brakes also. It looks awesome with the break light.

It’s a standard size adapter as long as your Denali has the round plug in. It has the 7 pin connection and this plug fits great with the reverse light. It's nice to have two different pins, a 4 & 5 plug.

• Great product, well built, works great
• Nice and easy for multiple connections
• Delivers what they promise

Best tow Hitch light Plug: WOFTD 4 Pin round Plug

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If you vehicle has a round trailer connector this adapter will do the job for you. The Woftd trailer plug adapter adopts the 2 in 1 design, which combines 4 way plug with 5 way plug, and can be used by most trailers, easily convert 7 way flat blade into 5 way and 4 way round connector. It fits into any 7 pin round trailer plug.

The plugs are a tight fit but they work just fine. It is easy to use and a good solid unit. It is nice to have the options of multipal plug adaptors. This adapter works great especially if you happen to use someone's 7000lb car trailer.

• Perfect fit and handles both 4 and 5 pin plugs
• Nicely converts round to straight plugs no matter the pin number
• Very well made and trailer lights work perfectly

Best For Boat: COROTC 4 Pin round Plug

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Compared with other plug in this category, the corotc 4 pin round plug has a convenient design. This adapter is designed to take a round seven pin trailer light and brake connection and step it to 4 pin or 5 pin depending on your trailer setup. It allows towing 4 and the less common 5 wire trailers without worrying about compatability with a standard 7 wire receptacle. It can be used on many hydraulic systems to activate an electric solenoid valve to close the hydraulic brake line in reverse allowing the trailer to be backed up easily without applying the brakes. This is far more durable than the slightly cheaper option and gives you a couple options on connections.

It is suitable for boat, rv, atv, chevrolet, ford, dodge, ram, toyota or gmc.

• Holiday trailer plug and was easy to install
• Easy way to convert multiple lighting plugs
• New and hot release

Best With No problems: Kohree 4 Pin round Plug

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The kohree 4 pin round plug is satisfactory and appropriate and fits well with your daily purpose. It offers a trusted power supply for towing, well lights up running lights, tail lamps, rv camper lights or other 4-pin led accessories. It comes with a nice bracket and all the required attachment hardware. A well-sealed spring-loaded dust cover protects the connector.

The product is great, the attachment for the bumper is very good having the small slit to open to apply the main electrical plug. It is good for light duty use. It’s easy to hook up, the wires are all there. It is good for any vehicle with a 4 pin flat.

• Looks well constructed, and wires appear to be 12 gauge which is good
• Eases installation and allows versatile use
• Delivers what they promise

Best For RV hookup: Pollak 4 Pin round Plug

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We would, of course, be remiss if we didn't mention pollak 4 pin round plug for daily purpose. This product is an adapter for converting the normal "cheep" 4 pin flat connector that comes on most small trailers to the plug that is found built in to some vehicles. It allows one vehicle to tow utility trailers or boat trailers. The 717 EP 6-Way Round Pin to 4-Way Flat Adapter connects 6-way round pin connectors to a 4-way flat connector plug.

It has a non-corrosive glass-filled nylon shell and fits all 6-way sockets. It is all hard plastic. The full-length plug shell ensures positive latching with the socket. It is so easy to use, just plug and play. It is perfect for RV hookup.

• Good investment for long term
• Lot of satisfied buyers

Best For multiple Trailer types: Oyviny 4 Pin round Plug

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The oyviny 4 pin round plug is capable of outshining several other plug featured in this list in overall features for the price point. The Oyviny trailer plug adapter adopts the 2 in 1 design, converts a 7 way RV. It provides high-quality trailer towing accessories including universal trailer wiring harness, vehicle custom fit trailer wiring, trailer plug & adapter, trailer converter, trailer brake control wiring adapter, trailer lights and trailer tester etc. It features a standard round 7-way flat blade connector, easily snaps into the trailer's existing socket and holds securely, no loose fitting. It comes with 2 dust covers at the plug, so it keeps terminals clean and protected when not in use towing a trailer.

It is suitable for chevrolet, ford, dodge, ram, toyota or gmc, boat, trailer, rv, atv etc. Its Simple Plug & Play design eliminates the need for cutting or splicing, hassle free setup, easy to install and remove. The caps seal nicely protecting the electonics.

• Versatile, easy to install and works
• Delivers what they promise

Best Easy To Use: online LED 4 Pin round Plug

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The online led 4 pin round plug should be able to handle its purpose and duties with ease. Nickel-plated copper electrical terminals yield superior conductivity. It easily adapts your 6-way round socket to a 4-way flat connector used on lightweight trailers. The secure fitting design of the adapter allows your vehicle’s socket cover to lock it into place. It is easy to store and simple to install with no tools required.

This fully enclosed adapter is designed to stringent specifications and manufactured to last. The Durable nylon housing is designed to be latched on by the tow vehicle's socket while finger lugs allow easy removal when needed. It is very simple and works great.

• Finger lugs on each side allow for easy disconnect when ready
• Heavy duty nylon exterior is weather, shock, and temperature resistant
• Water, temperature, and shock resistant to provide years of reliable service