Been wiring my pick-up today and all is in and working connected up a front sidelight/indicator (only 1) and it flashers! Yippee however I have fitted stalks for all controls and they all work and 2 speed wipers, so I located the light green wire from the flasher unit and routed it to the sppeedo, but sadly it does not flasher? Do I need all 4 fitted to make it flash, I would have thought it would just illuminate without any lamps installed?
Hazzard warners work fine with 1 lamp fitted the pull switch flashes, once the unit is removed it that just illuminates, stays on
Many thanks any help welcome.
I have run a new warning lamp from the junction behind the dash but that also fails to illuminate, what do I need to do?

All other dash warning lamps work

bottom left Light green to green warning lamp in dash

everything else on the stalk works fine?