Hi, I've now found my old HBL and it shows the flasher can is a three pin. I will come to the can markings in a minute. There's a green (G)wire from the fuse, this is the fused ignition power, there's a light green/brown (LG/B) wire which goes to the indicator stalk. Finally there's a light green/purple (LG/P) which is the earth for the cluster tell tales. According to the wiring diagram the pins are marked (B) (B) and (L) which is really helpful
As the only common one is the (L) which presumably means 'load' has the (LG/B) for the switch. Now as the tell tales earth on one of the (B) terms and power goes on the other (B) term, which could mean one is connected internally to the can case and needs to be earthed.
So I would suggest that you keep the can away from the body for the moment connect the LG/B wire to pin L and connect the (G) wire to one of the others and try the indicator switch and see if they work (the tell tales won't). If it does connect the LG/P to the remaining pin and earth the can.
If it doesn't change the (G) to the other pin and try the indicators again and it should work.
If it still doesn't then either the can is suspect or the indicator switch is. To prove the switch is OK connect the (G) wire to the (LG/B) wire temporarily and try the indicator switch and the lights should come on but not flash.
If they come on that means it's the flasher can, if they don't then it's the indicator switch.
You can use a three pin can and connect as said or a two pin can and earth the (LG/P) separately.
Don't bother with the hazards at this time as they have a totally different wiring set up through the hazard switch, just concentrate on the indicators for now and use a flasher can, not a hazard can as they have a different load to work.
Hope this helps and not too confusing.
Colin