7 Pole to 7 Way RV Trailer Adapter Connector, OEM Standard 7 Pin Round to 7 Blade Wiring Harness for Semi Trucks & Commercial Vehicles

Trailer adapter worked perfectly going from my new tractor to an old dump trailer. Very easy to use and worked perfectly

As other have mentioned, the pigtail seems to have power on the brake wire. Not a huge deal, just a matter of re-configuring the wiring inside. Just don't buy it, throw it in your truck, only to realize it won't work for your needs unless it's rewired.Other than that, the pigtail seems nice and sturdy. We'll see how long it lasts.

Works as intended so far. Seems like decent quality for the low price.

Note that the pin assignments in the 7-way blade connector are standard, but the factory pin assignments for the 7-way round pin connector can vary from vehicle to vehicle. The pins for turn signals and tail lights are fairly standard but not so for 12V power, backup lights and brake control. I recommend getting a tester and making sure that the pins on the 7-way blade connector are doing what you expect before you hook up a trailer or you may end up with the electric brakes locked on, etc. Depending on your vehicle you may need to swap a couple of pins in the adapter. You can do this easily by taking apart the round-pin end, sticking a mini screwdriver into the hole in the front of the connector next to a pin socket, pulling the pin socket out by the wire, prying the retaining tab on the pin socket out a bit, and pushing it back into the correct hole until it locks.Note that this adapter will only work on vehicles where the brake lights are combined with the turn signals (one wire for the left-turn/brake light and one wire for the right-turn/brake light). This includes most pickups and vans, but on semi tractors and some other vehicles the brake light is separate (there is one wire for left turn, one for right turn, and one for brake lights) and this adapter will not work--you will need one that has a built-in converter that takes in the 3 wires for left, right and brake and puts out 2 wires for left/brake and right/brake.

Works great

Great quality adapter that worked perfect on my truck. Shipped quickly and was a great price!

Quality isn’t the best. But it works

It works well for what it is intended to do, (probably not what I used it for) and it seems to be good quality. I hooked it up to my 5th wheel, and to a semi tractor. Blinkers, tail, and marker lights all work perfect, but no brake lights. I know it is a different type of electrical system, but I thought I would try it to see what happens. Hopefully that helps someone answer the same question I had.