Tail lights inop, but brake lights ok

If dash lights and front park lights work,fuse will be ok. Check for burned out bulbs in the rear tail lights

check for a loom connection to the rear as it may have come apart.

Did you actually check the brake light switch for power in and out ?
There are two different fuses, one for each side. And the circuit includes the turn signal switch.
The third brake light bypasses the turn signals.

If tail lights don't work, check your dimmer switch for any shorts. If the brake lights don't work, then check the brake switch behind the brake pedal. You can test them with a multitester.
For brake shoes you need socket or star wrench, and needle nose pliers for the springs unless you have a spring too. If you have disc brakes, then socket set and a c-clamp to push the pistons back in.

O2 Sensor Circuit Low Voltage Bank 1 Sensor 2, this is the sensor screwed into the tail pipe behind the catalytic converter, most likely it is defective.

No. All those lights are on the same fuse and are controlled by the headlamp switch.

Make sure that the fuses were all checked on the fuse panel inside the vehicle under the dash. That is where the fuse for those lights is.

A VERY common Ford issue, is grounding. a ground may look clean, but it is too dirty to allow function. find your grounds and give them a scrub with a scotch brite pad they should be nearby to the bulb, normally they rear lights all combine into one

could be the socket where you put the bulb or the wire that goes to the socket. there could be no power going to the wire.

tnx 4 using fixya,

drcool

Open the rear door and there should be 2 screws or bolts going into the side of the light from the door opening.

the issue is the trailer, negative or power feed back,check grounds