if your vehicle is not equipped with trailer option, then you can wire it as an addition.
you will send to splice into the existing wiring harness on the truck. I will try to send you wiring diagram to help you find proper wires. you can install in line fuse to protect truck.
if you are checking fuse one in Engine compartment fuse box - it is not used
trailer fuse is in Smart Junction box - fuse box behind dash.