Seachoice 7-Way to 4/5-Way Trailer Connector Adapter (50-13811)
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Overview
The Seachoice 50-13811 7-Way to 4/5-Way Trailer Connector Adapter bridges the gap between a vehicle's 7-way round-pin connector and a trailer's standard 4 or 5-way flat-pin plug. It allows trucks, SUVs, and tow vehicles equipped with a 7-way blade connector to tow boat trailers, utility trailers, and other trailers wired with a 4-flat or 5-flat connector — without any cutting, splicing, or rewiring required.
Features
- Adapts a 7-way round vehicle connector to a 4 or 5-way flat trailer plug
- No wiring modifications required — plug-and-play installation
- Supports standard trailer lighting functions: running lights, brake lights, turn signals, and ground
- Durable construction suitable for marine and road trailering environments
- Compact design for easy storage in the tow vehicle when not in use
Best Use Cases
- Towing a boat trailer with a 4 or 5-flat connector from a truck or SUV with a factory 7-way blade outlet
- Connecting a utility or equipment trailer with standard flat-pin wiring to a 7-way tow vehicle
- Keeping as a spare adapter for rental or borrowed trailers with mismatched connector types
Connector Compatibility
- Vehicle side: 7-way round blade connector (standard on most trucks and SUVs)
- Trailer side: 4-way flat or 5-way flat connector (standard on most boat and utility trailers)
Parts Desk Insights
Best Use Case: This adapter is the go-to solution when a customer's tow vehicle has a 7-way blade outlet but their boat trailer uses a 4-flat or 5-flat plug. It is the most common connector mismatch encountered when customers upgrade their tow vehicle or borrow a trailer. Confirm which flat connector the customer's trailer uses (4-flat or 5-flat) — this adapter accommodates both.
Fitment Note: This adapter handles lighting circuits only (running lights, brake lights, turn signals, ground). It does not pass through the 7-way's auxiliary power, electric brake, or reverse light circuits to the trailer. If the customer's trailer has electric brakes or requires auxiliary power, a different wiring solution will be needed.
Common Scenario: Customers purchasing a new truck with a factory 7-way outlet who are towing an older boat trailer with a 4-flat connector. This adapter resolves the mismatch immediately without any trailer rewiring.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.