And while it could be in response to the power demand of the turn signals, two factors make it unlikely. One is that especially with headlights on, brakes on, at slow idle the regulator points are probably at the full flow position
In my case I have electric VR no points but I get what you are saying effectively it is at full charging
Not arguing here. Just noting what I see.
With engine running If you press the brake pedal the needle momentarily moves left then centers if you let off the pedal the needle has a slight bounce to the right. Apply , release, apply, release at the right frequency and you get the same bounce.
