High Beam lights
When I try to turn my headlights on high beam, my headlights go off. All of the
rest of the light are fine
Highly unlikely that both high beam filaments decided to go bad at the same time. It happens though. Do a continuity test of the bulbs. The other prospect is looking for a short on just the high beam circuit. Do the lights ever blink back on, in high beam, if you wait a while?
This will more than likely be a bad dimmer switch in column.
I would replace the bulbs or at least inspect them. It is not unusual for both bulbs to go out at the same time as they have been on for the exact same amount of time.
Looking for a Used F-250 Super Duty in your area?
CarGurus has 47,667 nationwide F-250 Super Duty listings starting at $1,795.
Search Ford F-250 Super Duty Questions
Ford F-250 Super Duty Experts