How do I replace or fix my turning signal switch left turning signal works

Replace the flasher to start with..... turn left signal on and listen to locate the flasher!

The problem may be in the emergency flasher button on the steering column. All the wiring runs through this switch. Try activating and deactivating the flashers many times. If this solves the problem and the symptom returns you could try a little WD40 in the switch by applying a squirt down the side of the switch or replace the switch.