1998 ford f250 brake lights and turn signals quit working checked all fuses in cab and under hood center brake light works

Check for a broken wire or loose connection at the multifunction switch. This can occur especially often if you use tilt steering. there is a few screws under the steering column shroud, unscrew the tilt wheel knob, you may vice grips to get it to unscrew. remove the shroud and check wiring and connections, remove the multifunction switch and make sure there are no wires loose in the connectors. If you have a wiring diagram you can jump the circuits at the connector, if no loose anything and you get lights to go on by jumping the switch, replace the multifunction switch (that's the lever on the left of the steering wheel, in case you were wondering)