Do the turn signals work normally?
The hazzard warning flasher and the turn signal flashers are two different units (will both be either #552 - standard thermal, #536 - HD thermal, or will accept a Tridon EL12 electronic unit.) If the turn signals are still working normally, I'd start with changing out the flasher unit.
If you get a regular flasher (thermal "silver can" style,) I think you'll only get hit for $3-4 each. For the electronics, expect to pay about 10. Advantage to the electronics? They last longer, and don't really care how many lights are plugged in - as long as it's not too many (thermal flashers will change flash speed when you plug in a trailer, for instance.)
5-90