what should i look for when my blinkers and hazzard lights quit working

Well: the circuit, the bulbs, the fuse, the relays,the switch itself.The sockets that the bulbs are in could be corroded: remove the lens to see if corrosion is present and if the bulb is dark,which means it is blown, and I would replace all the bulbs while I am at it because they tend to blow close together.the switch could be worn and loosing contact inside. The circuit wires could be short-circuiting somewhere .Use diaelectric grease to pre vent corrosion.

I assume you have checked ALL the fuses?