NEW SUN 4-way Flat to 6-way Round Trailer Adapter — 12-inch Harness with Bracket, Weatherproof Zinc Socket

Convert a 4-way flat trailer plug to a 6-way round connection quickly using the NEW SUN 12" harness adapter with mounting bracket. This compact adapter bridges older or simpler 4-way flat trailer wiring to a 6-way round socket so you can add auxiliary functions like electric brakes or auxiliary power without rewiring your vehicle. Built for frequent use and outdoor exposure, the assembly combines a pre-wired harness, a zinc die-cast 6-pin socket, and corrosion-resistant contacts to create a reliable link between trailer and tow vehicle. The included bracket holds the adapter securely in place while the spring-loaded dust cover helps keep moisture and dirt out when the connector is idle.

How does this adapter simplify hooking up different trailer plugs?

The NEW SUN adapter eliminates the need to change the tow vehicle’s connector or modify the trailer harness. You plug the 4-way flat into the vehicle and the 6-way round socket accepts accessories or trailer plugs that require the extra pins. This saves time at the hitch and avoids permanent changes to existing wiring.

• Plugs directly into a vehicle 4-way flat connector
• Provides a 6-pin round socket for brakes, aux power, or reverse lights
• Pre-wired harness reduces installation steps
• Bracket keeps the adapter within comfortable reach at the hitch

What makes this adapter durable for road and weather exposure?

Materials and design focus on corrosion resistance and mechanical strength for long-term outdoor use. The 6-pin socket uses zinc die-casting while connector pins are pure copper for reliable conductivity and less oxidation. A spring-loaded dust cover shields the socket from water, salt, and road debris when not in use.

• Zinc die-cast 6-pin socket for structural strength
• Pure copper connector pins for efficient conductivity
• Weatherproof dust cover with spring action
• Insulated wiring resists abrasion and moisture

How easy is installation and what can I connect with the extra wires?

Installation is straightforward: the harness is pre-wired so you simply mate the 4-way plug and mount the bracket where convenient. The 12" lead gives you room to add devices like electric brake controllers, reverse lights, or auxiliary power for accessories without stretching connections. No soldering or cutting is generally required for typical conversions.

• Pre-wired 4-way to 6-way conversion — plug-and-play setup
• 12" harness length allows room for brake/controller wiring
• Mounting bracket included for secure placement
• Compatible with common trailer electrical accessories

Will this affect trailer lighting or brake function?

This adapter passes existing lighting and basic signals through unchanged while providing extra pins for functions your 4-way flat cannot natively carry. It routes signals to the 6-way socket so accessories that expect separate circuits—such as electric brakes or auxiliary power—can operate when connected. Always verify wiring assignments and ground continuity before towing heavy loads.

• Maintains original lighting circuits for taillights and turn signals
• Adds separate pins for brakes, backup, or auxiliary power
• Prevents permanent changes to vehicle wiring
• Check wiring mapping for safe installation and operation

Who is this for? If you tow multiple trailers or want to add brake controllers, backup lights, or accessory power without swapping connectors or redoing wiring, the NEW SUN 4-way to 6-way adapter is designed for quick adaptation. It suits weekend boaters, landscapers, RV owners, and contractors who need a durable, weather-resistant, and easy-to-install solution to expand trailer functionality while keeping their original vehicle connector intact. The included bracket and 12" harness length aim to make installation tidy and practical for frequent hooking and unhooking.

FAQ

Q: Can I use this adapter for electric trailer brakes?

A: Yes. The adapter provides a 6-way socket that includes a brake circuit, but verify your vehicle wiring supports the brake controller current and proper pin mapping.

Q: Does the adapter resist road salt and rain?

A: Yes. Zinc die-cast housing, copper pins, and a spring-loaded dust cover improve resistance to moisture and corrosion.