7 Pin Trailer Plug Vs 4 Pin. The best way to make sure the harness wiring on your vehicle is working properly is to test each pin on the connector plug with a circuit tester, or have a friend connect their trailer plug. Free delivery and returns on eBay Plus items for Plus members.
I had to upgrade my four pin to a seven pin for my boat trailer.
We cover quick easy tips to help ensure your trailer makes a good connection to your vehicle.
The best way to make sure the harness wiring on your vehicle is working properly is to test each pin on the connector plug with a circuit tester, or have a friend connect their trailer plug. Connect the major vehicle and the additional trailer; Transfer the electronic signal from the Prevents difficulty in plug removal. I'm thinking of picking up the above mentioned parts as well as the factory trailer brake controler.