Check the headlight switch.
There is sometimes a separate flasher for the four way curcuit.
its marked "guages"
Fuses?
Check fuses, common circuit
Did you check the fuses for that circuit?
Check the fuses
Fuses are located in the middle armrest and near the floorboard of each front door.
change the headlight switch !
check the fuses.
check fuses
Check the headlight switch and make sure you are getting current out of the switch when you turn on the lights.
Working brake lights are important for safety reasons while driving. It is important to check all of the wiring, if the brake lights are not working and the fuses and bulbs have been checked.