I wouldn't assume the flasher can is working.
3 Step Process:-
1. Check the flasher can with a testlight to see if it is getting power? (Don't forget that the can has 2 power supplies. If YES, then a new can is required. If NO, then ....
2. Check the indicator power to the stalk. If YES, check power coming from the stalk but probably stalk needs work. If NO, then ....
3. Follow the power wire back through the loom, checking at each join, check both sides of the fusebox.
You will eventually get your testlight to fire up. Then work back towards the globes replacing/repairing as you go until your test light fires up.
I haven't done this on mine, so the above relies on the stalk being positively powered. If the stalk switch provides the earth:
1. ensure the stalk is earthed by temporarily providing an effective earth (another wire properly earthed hooked in). If work YES, service stalk and ensure permanently effective earth - retest. If work NO, then ....
2. earth negative side of flasher can. If work YES, service stalk and retest. If work NO, then ....
3. Replace flasher can and retest. If work YES, service stalk and retest. If work NO, then .....
4. test both sides of the fuse box and replace fuses (again) if required. If work YES, service stalk and retest. If work NO ....
5. Check your globes (unlikely this is the issue, but if a couple went at the same time due to water or heat, there may not be enough load on the circuit to activate the can - unlikely but possible) If work YES, then service stalk and retest. If work NO, then ....
6. Take vehicle to auto elec or sell to me very cheaply.
MaygZ