7-Way Round to 4-Pin Flat Trailer Plug Light Adapter – RV, Boat, or Utility Trailer
Part Number / SKU: 12716
Converts your vehicle’s 7-Way Round blade plug to a 4-Pin flat trailer connector — perfect for small utility, boat, or camper trailers.
About This Product
The 7-Way Round to 4-Pin Flat Trailer Plug Light Adapter lets you connect a 4-Pin flat trailer plug to any tow vehicle with a 7-Way Round blade socket. It provides essential lighting functions — running, brake, and turn signals — without the need for cutting or rewiring.
Features
- Converts 7-Way Round (RV-style blade) connector to a 4-Pin flat trailer plug
- Supports running, turn, and brake light functions
- Plug-and-play design — no tools or splicing required
- Durable molded housing with corrosion-resistant brass terminals
- Weather-sealed body suitable for outdoor and marine use
- Compact size fits easily in storage compartments or glove boxes
Compatibility
- Vehicle Side: 7-Way Round blade connector
- Trailer Side: 4-Pin flat connector
- Works with most trucks, SUVs, RVs, and vehicles equipped with towing packages
Visual Reference
| Your Towing Vehicle Plug Looks Like This | Your Trailer Plug Looks Like This |
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Specifications
| Part Number | 12716 |
| Vehicle Connector | 7-Way Round (blade-style) |
| Trailer Connector | 4-Pin Flat |
| Voltage | 12 V DC |
| Supported Functions | Running lights, brake, left/right turn |
| Ground Connection | Through 4-Pin flat connector |
| Material | Molded plastic housing, brass contacts |
| Weather-Resistant | Yes |
Note: This adapter provides lighting functions only (running, turn, and brake). The auxiliary, reverse, and brake-controller circuits in the 7-Way plug are not used by 4-Pin trailer systems.
Need more trailer wiring or lighting parts? Visit our eBay store for plug adapters, harnesses, and connector kits.