Check the fuses. There are two fuses that control the turn signals and brake lights: one for the left side and one for the right side. Check the fuse box to find the blown fuses and replace them.
Check the turn signal switch. The turn signal switch is located on the steering column. Ensure that the switch is in the correct position and moves smoothly between the left and right turn positions. If the switch is broken, replace it.
Check the wiring. Ensure the wiring is not damaged or loose. Look for any broken or frayed wires and repair or replace them as necessary.
Check the flasher relay. The flasher relay controls the flashing of the turn signals. Ensure the flasher relay is properly seated in its socket and not broken. If the flasher relay is broken, replace it.
