99 alero turn signals not working

Please, Can anyone help me? My turn signals have quit working on my 1999 Alero. I have checked the bulbs, the fuses, and have replaced the hazard switch (in Alero's the flasher & the hazard switch are in the same component) & I've tried replacing the turn signal switch....Is there anything else that can be causing this problem? And how do I fix it?

turn singnal switch or flasher relay.