*Please note this is a basic installation, and all jobs are a little different. If you're installing a larger trailer with electric brakes, you'll need a brake controller, which will involve some wiring to be done under the dash.
You can also jump straight to the Trailer Wiring Color Chart if that's all you need!
If you like to keep tabs on all of your trailer wiring functions like electric brakes, brake lights, turn signal flashers and running lights you might consider buying a trailer plug tester. They make these testers for small and large wiring plugs and they really make troubleshooting your trailer wiring much easier!