Hello all

,
Have a 1969, the 4-way flasher has a plastic center knob similar to a VW.
The 4-way signal lights work, I hear the flasher intermittent sound when pulled.
When the flasher is on:
1. No lights are blinking in the top signal light arrows of the RPM gauge
2. No lights are blinking in the pull knob center
As I take the knob out, I see what appears a glass/plastic clear tube inside the knob.
The turning signal arrows flash normal when the flasher is Not on!
Should the knob or the gouge signal arrows flash?
All input is appreciated
Thanks in advance,
Jose