is it just turn signals or hazards or both? they have seperate flashers. u might want to try swapping the two to determine if its the flasher or something in your wiring. cheap to replace also, like $10 or less
if the hazards work and the turn signals don't. try moving the turn signal arm(on switch) a bit more up or down and see it that causes them to work, if so, the contants in the switch may be bad.
try this when you start your car and they dont work.when you turn the key forward and it starts you let go of the ignition and it kicks back a little.sometimes it doesnt so while its running,with out turning off the ignition turn it towards you backwards to get rid of the slack.they get worn.mine did that and blinkers worked off an on.my friend owns a garage and told me about this.