Hubby installed one of these
is that good enough?
Also, your tow vehice should have the "trailer towing package", which usually includes a wiring package that isolates the vehicle wiring (marker lights, brake, stop, and turn signals) from the trailer wiring. That way, if there is a fault in the trailer wiring wirig short, etc.) it wonn't affect the vehicle systems.
If it doesn't, aftermarket kits are available, and bUilding one is also easy.
Just a thought.