No, and that's because flashers are NOT part of the GI fed by the 6.3VAC winding direct from the transformer (through the GI relay on the power board). Each lamp pulls 0.25A max

Flashers are just another solenoid to the board. They should flash when the respective solenoid trigger is firing in the solenoid test runs. They run at a higher voltage (7 to 13V) and pull many more amps (0.6 to 0.9) each.

If flashers are not lighting during the solenoid test, the driving transistor is probably bad, but could also be broken warming resistors, a bad relay that toggles the multiplexed solenoid drivers, bad socket, bad bulbs, bad connectors in the solenoid area.