SPEEDWOW
SPEEDWOW Heavy Duty 7 Way Inline Trailer Plug, 8 Feet Connector Cable 7Pin RV Round Extension Wiring Harness Weatherproof Junction Box, Premium Light & Brake Control Wiring Wires for RV Towing Car
SPEEDWOW Heavy Duty 7 Way Inline Trailer Plug, 8 Feet Connector Cable 7Pin RV Round Extension Wiring Harness Weatherproof Junction Box, Premium Light & Brake Control Wiring Wires for RV Towing Car
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➤【Wire Harness】: 7-way plug trailer cable is up to 8 feet long,provides enough extra length with 7 pcs of RV standard color coded wires,the cable inside is made of 14-10AWG pure copper with safe and stable conductivity,outside is made of pvc flame retardant jacket,plug is tightly connected with all parts,good sealing makes it waterproof and corrosion-resistant,designed for outdoor trailers.
➤【Trailer Box】: Trailer wire box with unique color coding,easy to quickly identify color function of the corresponding wire,simplify your wiring process,and help to manage loose trailer wires,provided open and closed rubber grommets can be flexible to choose your convenient wiring position;
➤【7 Way Plug】: 7-pin trailer heavy-duty plug is molded from a 7-way copper blade,upgraded from a single plug with poor contact to a safe and high-quality double plug,which plugs more securely into trailer's socket,and is a perfect replacement for trailer's original short cable.
➤【Widely Used】: Suitable for most RV trailers,campers,food trucks, etc,can be directly connected to to turn /brakes/ reverse/tail/auxiliary light etc,with abs trailer wire box can also adapt to all kinds of bad weather,prevent wire connectors from being exposed to the outside world,waterproof and dust-proof to prolong the service life of the trailer wires.
➤【Tips】: Since some differences between different trailer manufacturers,there are many different wiring types,we provide two kinds of cables,RV standard and sae,before purchasing,please refer to our wiring instructions and choose according to corresponding color and function to avoid mistakes.
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I needed to upgrade from a 4pin to a 7pin connector after adding brakes to my trailer. This kit worked perfectly. The cord was longer than I needed, but that was my choice during selection. The overall quality of both the cord and the connection box is very good.
The wiring and plug look to be of good quality, and the junction box made for an easy installation.
Installation was straightforward, although the wiring was reversed compared to my truck. This was an easy fix. The unit is wellbuilt and fits perfectly.
This is the best method I've found for wiring a trailer. I used it to add all new lights and wiring to a large flatbed trailer. You must pay attention to the colors on the junction box as they differed from my wiring, but it is still easy to follow. I took photos before closing the box for future reference.
It looks like it will be easy to install, though I haven't completed the installation yet.

I needed to upgrade from a 4pin to a 7pin connector after adding brakes to my trailer. This kit worked perfectly. The cord was longer than I needed, but that was my choice during selection. The overall quality of both the cord and the connection box is very good.
The wiring and plug look to be of good quality, and the junction box made for an easy installation.
Installation was straightforward, although the wiring was reversed compared to my truck. This was an easy fix. The unit is wellbuilt and fits perfectly.
This is the best method I've found for wiring a trailer. I used it to add all new lights and wiring to a large flatbed trailer. You must pay attention to the colors on the junction box as they differed from my wiring, but it is still easy to follow. I took photos before closing the box for future reference.
It looks like it will be easy to install, though I haven't completed the installation yet.